A high-speed production line for fin processing

Abstract

The present invention discloses a high-speed production line for fin processing, which includes a progressive die for punching and longitudinal cutting. A fin buffer area is arranged after the progressive die, and a special-shaped cutting device, a feeding device and a transverse cutting device are sequentially arranged after the fin buffer area; the special-shaped cutting device includes a special-shaped cutting lower knife and a special-shaped cutting upper knife, and a special-shaped cutting driving mechanism for controlling the up and down movement of the special-shaped cutting upper knife is also arranged; the transverse cutting device includes a transverse cutting lower knife and a transverse cutting upper knife, and a transverse cutting driving mechanism for controlling the up and down movement of the transverse cutting upper knife is also arranged. By adjusting the fin processing procedure, the present invention moves the special-shaped cutting and transverse cutting out of the progressive die of the punching machine, and through the structural design of the special-shaped cutting device and the transverse cutting device, the processing speed of the special-shaped cutting fins can be effectively improved, and it can be widely applied to the field of fin processing.

Description

Technical Field

[0001] The present invention relates to the technical field of fin processing, and in particular to a high-speed production line for fin processing. Background Art

[0002] In the processing of heat exchanger fins, traditional equipment mainly continuously completes processes such as fin stretching, punching, flanging, longitudinal cutting, and transverse cutting on a punching press, and fin processing is basically completed on the punching press. This structure requires maintaining the consistency of the speeds of each step. A reduction in the speed of any one link will affect the progress of the entire processing. The main factors affecting the speed are transverse cutting and special-shaped cutting. For transverse cutting, mainly because the transverse cutting device is cantilever-mounted at the rear end of the progressive die of the punching press, and the up and down movement of the punching press drives the transverse cutting device to complete the cutting of the fins. The transverse cutting speed of this structure is slow. The main reason is that the transverse cutting blade can only complete the cutting of the fins when the moving template is at the bottom dead center. Therefore, relative to the movement cycle of the die, the transverse cutting time is short, and the faster the die speed, the shorter the time left for transverse cutting. And within this limited time, it is necessary to complete the falling and retracting of the transverse cutting blade, which requires the transverse cutting speed to be fast enough. If the speed is slow, it will inevitably affect the progress of subsequent processes. This requires that the spring force in the transverse cutting device be large enough to quickly retract the blade, and the greater the spring force, the greater the reverse impact force on the striking rod. Under the action of the lever arm, the dynamic balance of the die is changed, which easily causes the punching press to generate eccentric load, resulting in changes in the longitudinal cutting load, causing the fins to be longitudinally cut out of alignment or burrs to be generated during longitudinal cutting, thus affecting the processing quality of the entire fins. For this reason, Chinese Patent Application No. 2016205642625 discloses a high-speed production line for fins, which separates the transverse cutting device from the punching press and moves it backward, and sets a reserved area to overcome the problem of inconsistent speeds between the punching press and the transverse cutting device. However, it can be seen from the figure that the transverse cutting device of this structure still adopts the traditional punching structure of the punching press, with low efficiency.

[0003] In addition, when the existing punching press performs special-shaped cutting with a feeding pitch that is inconsistent with the processing, it is necessary to return the material for blanking, which may lead to problems such as repeated punching and longitudinal cutting of the fins, resulting in burrs on the fins and affecting the quality of the fins. At the same time, it will also affect the processing speed of the fins. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-speed production line for fin processing to solve the problem of low processing speed of existing fin processing production devices.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a high-speed production line for fin processing, including a progressive die for realizing punching and longitudinal cutting. After the progressive die, a fin buffer area is provided, and after the fin buffer area, a special-shaped cutting device, a feeding device, and a transverse cutting device are sequentially arranged;

[0006] The special-shaped cutting device includes a special-shaped cutting lower knife fixedly arranged below the fin conveying direction and a special-shaped cutting upper knife floatingly arranged above the fin conveying direction for performing special-shaped cutting on the fins, and a special-shaped cutting driving mechanism for controlling the up-and-down movement of the special-shaped cutting upper knife is also provided;

[0007] The cross-cutting device includes a cross-cutting lower knife fixedly arranged below the fin conveying direction and a cross-cutting upper knife floatingly arranged above the fin conveying direction for performing cross-cutting on the fins, and a cross-cutting driving mechanism for controlling the up-and-down movement of the cross-cutting upper knife is also provided.

[0008] Further, the special-shaped cutting driving mechanism includes a special-shaped cutting driving shaft arranged in parallel above the special-shaped cutting upper knife, a first eccentric wheel arranged on the special-shaped cutting driving shaft, a first connecting rod is arranged between the first eccentric wheel and the special-shaped cutting upper knife, and a special-shaped cutting driving source for controlling the rotation of the special-shaped cutting driving shaft is also provided.

[0009] The cross-cutting driving mechanism includes a cross-cutting driving shaft arranged in parallel above the cross-cutting upper knife, a second eccentric wheel arranged on the cross-cutting driving shaft, a second connecting rod is arranged between the second eccentric wheel and the cross-cutting upper knife, and a cross-cutting driving source for controlling the rotation of the cross-cutting driving shaft is also provided.

[0010] Preferably, both the special-shaped cutting driving source and the cross-cutting driving source are servo motors.

[0011] To ensure the reliability of transmission, the cross-cutting upper knife is fixedly arranged on a cross-cutting sliding plate, a cross-cutting fixed seat is fixedly arranged on the cross-cutting sliding plate, a first rotating bearing is arranged below the second connecting rod, and a bearing connecting pin is arranged between the first rotating bearing and the fixed seat; a second rotating bearing is arranged between the cross-cutting driving shaft and the second eccentric wheel; the connection structure between the special-shaped cutting upper knife and the special-shaped cutting driving shaft is the same as the connection structure between the cross-cutting upper knife and the cross-cutting driving shaft.

[0012] Preferably, a group of the second connecting rods are uniformly arranged along the axial direction of the cross-cutting driving shaft.

[0013] To ensure the continuity of feeding, a feeding device is also provided before the progressive die, a strip coil fixing frame is arranged before the feeding device, and a strip buffer area is arranged between the strip coil fixing frame and the feeding device.

[0014] To ensure the accuracy of the strip entering the special-shaped cutting device, a guiding punch for controlling the strip direction is also provided on the special-shaped cutting device.

[0015] Advantages of the present invention: By adjusting the fin processing station, punching and longitudinal cutting are carried out in the progressive die, and the special-shaped cutting and cross-cutting originally completed in the progressive die are removed. Therefore, the punching and longitudinal cutting speeds of the fins can be increased. The present invention moves the special-shaped cutting and cross-cutting behind the progressive die and sets up a fin buffer zone between the progressive die and the special-shaped cutting and cross-cutting. The fins can be temporarily stored in the fin buffer zone. Therefore, the problem that the stamping speed of the progressive die is inconsistent with the working speeds of the special-shaped cutting and cross-cutting can be solved. The special-shaped cutting uses a special-shaped cutting drive shaft to drive an eccentric wheel to rotate to control the up and down movement of the special-shaped cutting upper knife, and the special-shaped cutting can be carried out at any time when the fin advances. At the same time, multiple special-shaped cutting devices can be arranged side by side according to the number of special-shaped cuts on the fin to improve the efficiency of the special-shaped cutting. The special-shaped cutting device is driven by a servo motor and has the advantage of fast reaction speed. Combined with the installation structure of the special-shaped cutting upper knife, high-speed processing is realized. This special-shaped cutting structure solves the problem that the traditional special-shaped cutting is set in the progressive die. When the punching machine processes special-shaped cuts with inconsistent feeding pitches, it is necessary to return the material for blanking, which is not only slow, but may also cause repeated punching and longitudinal cutting of the fins, resulting in burrs on the fins. The cross-cutting device can also cut the fins at any time according to the feeding speed of the fins to improve the production speed. At the same time, it overcomes the traditional structure of cantilever installation plus spring return. At the moment when the cross-cutting upper knife works, the upper die is subjected to an instantaneous impact force, which destroys the dynamic balance of the die and is prone to cause the problem of off-load of the punching machine on the progressive die. The cross-cutting upper knife is driven by an independent drive mechanism, thus overcoming the problem that the existing cross-cutting upper knife structure fixed on the upper die can only cut the fins when the die moves to the bottom dead center, and the available time for cross-cutting is short. The present invention can perform cross-cutting immediately after the fins are fed in place, and the reserved cutting time is long. Therefore, the residence time of the fins can be reduced, the advancing speed of the fins can be accelerated, and at the same time, the speed of the drive mechanism can be increased, further shortening the working operation time and further accelerating the advancing speed of the fins.

[0016] The present invention will be described in more detail below with reference to the drawings and embodiments. Brief Description of the Drawings

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a side view of the special-shaped cutting device in the present invention.

[0019] Figure 3 It is a three-dimensional structural schematic of the cross-cutting device in the present invention Figure 1 .

[0020] Figure 4 It is a three-dimensional structural schematic of the cross-cutting device in the present invention Figure 2 .

[0021] Figure 5This is the front view of the cross-cutting device in the present invention.

[0022] Figure 6 This is the side view of the cross-cutting device in the present invention.

[0023] Figure 7 This is the schematic structural diagram of the feeding device in the present invention using servo feeding. Detailed implementation manners

[0024] Embodiment, as Figure 1 shown, a high-speed fin processing production line is used for processing fins to improve the processing speed of fins, especially the production speed of fins with special-shaped cuts. The production line includes a coil holder 7, a feeding device 6, a progressive die 1, a special-shaped cutting device 3, a feeding device 4 and a cross-cutting device 5 arranged in sequence. A strip buffer area 8 is arranged between the coil holder 7 and the feeding device 6 to overcome the problem that the feeding amount on the coil holder 7 is inconsistent with the feeding amount of the feeding device 6. A fin buffer area 2 is arranged between the progressive die 1 and the special-shaped cutting device 3 to overcome the problem that the processing speed of the progressive die 1 is inconsistent with the special-shaped cutting processing speed.

[0025] The coil holder 7 is used for placing the coil and ensuring that the strip is conveyed along a set path. A strip driving motor and a strip guiding mechanism are arranged on the coil holder 7 for forwardly conveying the strip.

[0026] The feeding device 6 is arranged at the front end of the progressive die and is used for intermittently feeding the strip into the progressive die 1 according to the feeding pitch of the progressive die. The feeding device 6 is also driven by a servo motor to achieve fast and accurate feeding.

[0027] The progressive die 1 is fixedly installed on a punching press, and the punching and forming of the strip are completed through the up-and-down movement of the punching press. In the present invention, processes such as drawing, punching, and longitudinal cutting are arranged in the progressive die 1 for completing the punching and longitudinal cutting of the fins. Since both punching and longitudinal cutting are consistent with the feeding pitch of the progressive die, the punching speed of the punching press can be maximally improved and is not restricted by other factors except the feeding speed.

[0028] As Figure 2As shown in the figure, the special-shaped cutting device 3 includes a special-shaped cutting lower knife 31 fixedly arranged below the fin conveying direction and a special-shaped cutting upper knife 32 floatingly arranged above the fin conveying direction for performing special-shaped cutting on the fins. A special-shaped cutting driving mechanism 33 for controlling the up and down movement of the special-shaped cutting upper knife 32 is also provided. A guiding punch 34 for controlling the tape direction is arranged at the feeding end of the special-shaped cutting device 3 to ensure that the tape enters the special-shaped cutting device 3 in accordance with the set direction to complete the special-shaped cutting. The number of the special-shaped cutting devices 3 can be set according to the number of special-shaped cuts required for each section of fins, that is, multiple special-shaped cutting devices can be arranged along the tape conveying direction to improve the special-shaped cutting speed. Separating the special-shaped cutting of the fins from the progressive die 1 can effectively solve the problem that the special-shaped cutting is inconsistent with the feeding pitch, and the need to return the fins for special-shaped cutting affects the processing speed of the fins. After pulling out the special-shaped cutting, the fins on the progressive die can be continuously conveyed forward according to the set feeding pitch.

[0029] To improve the speed of the special-shaped cutting itself, the special-shaped cutting driving mechanism 33 includes a special-shaped cutting driving shaft 331 arranged in parallel above the special-shaped cutting upper knife 32, a first eccentric wheel 332 arranged on the special-shaped cutting driving shaft 331. A first connecting rod 333 is arranged between the first eccentric wheel 332 and the special-shaped cutting upper knife 32. A special-shaped cutting driving source 334 for controlling the rotation of the special-shaped cutting driving shaft 331 is also provided, and the special-shaped cutting driving source 334 is a servo motor. The servo motor has the advantages of fast corresponding speed and high precision. Therefore, the working time and rotation speed of the servo motor can be adjusted according to the position of the special-shaped cutting. And it can adjust the parameters of the servo motor according to different fins to meet the requirements of special-shaped cutting of various sizes of fins. Therefore, it has high versatility and is convenient for adjustment and maintenance.

[0030] After being cut by the special-shaped cutting device 3, the fins are sent into the cross-cutting device 5 through the feeding device 4. To ensure the feeding accuracy and speed, the feeding device 4 can select a rolling feeding device disclosed in the Chinese patent application No. 201620564262.5, with the patent name of a high-speed fin production line, or a servo feeding structure can also be used for feeding. The servo feeding structure is as Figure 7As shown in the figure, it includes a feeding servo motor 41, a swing arm 42 driven by the servo motor 41. The other end of the swing arm 42 is connected with a feeding connecting rod 43, and the feeding connecting rod 43 is connected with a feeding movable plate 44. Feeding fingers 45 are arranged on the feeding movable plate 44. A feeding fixed plate 46 is arranged behind the feeding movable plate 44, and feeding fingers 45 are also arranged on the feeding fixed plate 46. A feeding cover plate 47 for controlling the up and down floating of the fins is further arranged above the feeding movable plate 44 and the feeding fixed plate 46. The rotation of the feeding servo motor 41 drives the swing arm 42 to swing, thereby driving the feeding connecting rod 43 and the feeding movable plate 44 to move back and forth. Under the action of the feeding fingers 45 on the feeding movable plate 44, the fins are driven to move towards the feeding fixed plate 46. This feeding structure can control the feeding time and speed according to the rotation time and speed of the feeding servo motor 41, with a fast response speed and high efficiency.

[0031] As Figures 3 to 6 As shown in the figure, the cross-cutting device 5 includes a tool holder 510 fixedly arranged on the lower die plate of the mold, and a cross-cutting lower knife 52 arranged on the tool holder 510. The cross-cutting lower knife 52 is fixedly arranged below the traveling route of the fins. It further includes a cross-cutting upper knife 51. The cross-cutting upper knife 51 is floatingly arranged above the traveling route of the fins, and a cross-cutting driving mechanism 53 for controlling the up and down movement of the cross-cutting upper knife 51 is also arranged.

[0032] The specific installation and connection structure of the cross-cutting upper knife 51 is as follows: The cross-cutting upper knife 51 is fixedly arranged on the cross-cutting sliding plate 54. A set of waist-shaped holes 541 in the same movement direction as the cross-cutting sliding plate 54 are arranged on the cross-cutting sliding plate 54. A set of limit bolts 5101 matched with the waist-shaped holes 541 are fixedly arranged on the tool holder 510, thereby restricting the stroke of the cross-cutting upper knife 51.

[0033] The cross-cutting drive mechanism 53 includes a cross-cutting drive shaft 531 arranged in parallel above the cross-cutting upper knife 51. At least two support seats 512 are fixedly arranged on the tool holder 510, and the cross-cutting drive shaft 531 is rotatably supported on the support seats 512. A group of second eccentric wheels 532 are evenly and eccentrically installed on the cross-cutting drive shaft 531, and a second rotating bearing 58 is arranged between the second eccentric wheel 532 and the cross-cutting drive shaft 531. A second connecting rod 533 is fixedly arranged below the second eccentric wheel 532, and a first rotating bearing 57 is arranged below the second connecting rod 533. A group of cross-cutting fixed seats 55 that cooperate with the second connecting rod 533 are fixedly arranged on the cross-cutting sliding plate 54, and a bearing connecting pin 56 is arranged between the first rotating bearing 57 and the cross-cutting fixed seat 55. Under the action of the second eccentric wheel 532, the rotation of the cross-cutting drive shaft 531 drives the second connecting rod 533 to move up and down, thereby driving the cross-cutting sliding plate 54 and the cross-cutting upper knife 51 fixed on the cross-cutting sliding plate 54 to move up and down. To control the rotation of the cross-cutting drive shaft 531, a cross-cutting drive source 534 for driving the cross-cutting drive shaft 531 to rotate is also provided. The cross-cutting drive source 534 preferably adopts a servo motor. A motor support seat 511 for installing the servo motor is also arranged on the tool holder 510. A driving gear 535 is arranged at the output end of the servo motor, and a driven gear 536 is arranged at one end of the cross-cutting drive shaft 531. A transmission chain 537 is arranged between the driving gear 535 and the transmission gear 536. Through this cross-cutting device 5, the rapid cross-cutting of the fins can be realized, and the fins can be cross-cut at any time period. The cross-cutting speed is fast and the time used is short. At the same time, the working time and rotation speed of the servo motor can be adjusted according to different fin lengths, so as to meet the requirements of high-speed production. The specific connection structure of the special-shaped cutting device 3 can be the same as that of the cross-cutting device 5 or adopt a similar structure.

[0034] The present invention has been described exemplarily in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention; or without improvement, the above-mentioned concept and technical solution of the present invention are directly applied to other occasions, they are all within the protection scope of the present invention.

Claims

1. A high-speed production line for fin processing, including a progressive die (1) for punching and longitudinal cutting, Characterized in that: A fin buffer zone (2) is arranged after the progressive die (1), and a special-shaped cutting device (3), a feeding device (4) and a transverse cutting device (5) are successively arranged after the fin buffer zone (2); The special-shaped cutting device (3) includes a special-shaped cutting lower knife (31) fixedly arranged below the fin conveying direction and a special-shaped cutting upper knife (32) floatingly arranged above the fin conveying direction for special-shaped cutting of the fin, and a special-shaped cutting driving mechanism (33) for controlling the up and down movement of the special-shaped cutting upper knife (32) is also arranged; The transverse cutting device (5) includes a transverse cutting lower knife (51) fixedly arranged below the fin conveying direction and a transverse cutting upper knife (52) floatingly arranged above the fin conveying direction for transverse cutting of the fin, and a transverse cutting driving mechanism (53) for controlling the up and down movement of the transverse cutting upper knife (52) is also arranged; The special-shaped cutting driving mechanism (33) includes a special-shaped cutting driving shaft (331) arranged in parallel above the special-shaped cutting upper knife (32) and a first eccentric wheel (332) arranged on the special-shaped cutting driving shaft (331). A first connecting rod (333) is arranged between the first eccentric wheel (332) and the special-shaped cutting upper knife (32), and a special-shaped cutting driving source (334) for controlling the rotation of the special-shaped cutting driving shaft (331) is also arranged; The transverse cutting driving mechanism (53) includes a transverse cutting driving shaft (531) arranged in parallel above the transverse cutting upper knife (52) and a second eccentric wheel (532) arranged on the transverse cutting driving shaft (531). A second connecting rod (533) is arranged between the second eccentric wheel (532) and the transverse cutting upper knife (52), and a transverse cutting driving source (534) for controlling the rotation of the transverse cutting driving shaft (531) is also arranged; Both the special-shaped cutting driving source (334) and the transverse cutting driving source (534) are servo motors; The transverse cutting upper knife (52) is fixedly arranged on a transverse cutting sliding plate (54), a transverse cutting fixed seat (55) is fixedly arranged on the transverse cutting sliding plate (54), a first rotating bearing (56) is arranged below the second connecting rod (533), and a bearing connecting pin (57) is arranged between the first rotating bearing (56) and the transverse cutting fixed seat (55); A second rotating bearing (58) is arranged between the transverse cutting driving shaft (531) and the second eccentric wheel (532); The connection structure between the special-shaped cutting upper knife (32) and the special-shaped cutting driving shaft (331) is the same as the connection structure between the transverse cutting upper knife (52) and the transverse cutting driving shaft (531); A guiding punch (34) for controlling the tape direction is also arranged on the special-shaped cutting device (3); The feeding device (4) is a servo feeding structure, including a feeding servo motor (41) and a swing arm (42) driven by the feeding servo motor (41). The other end of the swing arm (42) is connected with a feeding connecting rod (43). The feeding connecting rod (43) is connected with a feeding movable plate (44). A feeding finger (45) is arranged on the feeding movable plate (44). A feeding fixed plate (46) is arranged behind the feeding movable plate (44). A feeding finger (45) is also arranged on the feeding fixed plate (46). A feeding cover plate (47) for controlling the up and down floating of the fin is arranged above the feeding movable plate (44) and the feeding fixed plate (46). The rotation of the feeding servo motor (41) drives the swing arm (42) to swing, thereby driving the feeding connecting rod (43) and the feeding movable plate (44) to move back and forth. Under the action of the feeding finger (45) on the feeding movable plate (44), the fin is driven to move towards the feeding fixed plate (46).

2. The high-speed fin processing production line according to claim 1, characterized in that: A set of the second connecting rods (533) is uniformly arranged along the axial direction of the cross-cutting drive shaft (531).

3. The high-speed fin processing production line according to claim 1, characterized in that: A feeding device (6) is further arranged before the progressive die (1). A coil holder (7) is arranged before the feeding device (6). A strip buffer zone (8) is arranged between the coil holder (7) and the feeding device (6).

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