Low frequency drawing device for thin-walled copper tube

Abstract

The present application relates to a kind of low-frequency drawing device of thin-walled copper pipe, belong to copper pipe processing device technical field.The two symmetrical installation plates are included, transmission mechanism is arranged between the two installation plates, forming mechanism is slidably arranged on the top of the two installation plates, drawing mechanism is fixedly arranged on transmission mechanism, adjusting mechanism is fixedly arranged between the two installation plates.The present application is compared with traditional device by setting two long core rods of intermittent alternate use, and the time of intermediate feeding is saved, so that the processing efficiency and overall practicability are greatly improved.The whole process is highly automated, automatically pushes the die holder to move during the movement of support plate, so that the pointed end of copper pipe is automatically inserted through the die holder, and clamping and drawing operation is completed.In addition, the position of the two long core rods is automatically adjusted and exchanged, and during the adjusting process, the die holder is automatically released from the limit, so that the die holder is automatically reset, to ensure the normal switching use of the two long core rods.

Description

Technical Field

[0001] This invention belongs to the technical field of copper tube processing equipment, and relates to a low-frequency drawing device for thin-walled copper tubes. Background Technology

[0002] Copper tube drawing is a plastic forming process that uses external force to force copper billets through a die, achieving diameter reduction, wall thickness fixation, or wall thickness reduction. It is widely used in industries such as refrigeration, electronics, and power. Traditional copper tube drawing operations are mostly manual. Operators first straighten the tipped copper tube using a straightening machine and then insert it onto a long mandrel. Next, the tip of the copper tube is passed through the die hole, and then a drawing carriage clamps the tip, completing the drawing operation. Traditional operations typically use a single long mandrel, mainly for slightly larger diameter tubes; multiple long mandrels can be operated simultaneously for tubes with a diameter of around 1 cm. When using only one long mandrel, the next copper tube can only be fed after the previous one has been drawn. This process involves a certain waiting time, preventing continuous drawing and resulting in low overall processing efficiency and limited practicality. Therefore, we propose a low-frequency drawing device for thin-walled copper tubes to solve the aforementioned problems. Summary of the Invention

[0003] In view of this, in order to solve the problem that traditional drawing devices have a certain waiting time during the processing, cannot achieve continuous drawing processing, resulting in low overall processing efficiency and poor practicality, the present invention provides a low-frequency drawing device for thin-walled copper tubes.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a low-frequency drawing device for thin-walled copper tubes, comprising two symmetrically arranged mounting plates;

[0005] A transmission mechanism is disposed between the two mounting plates;

[0006] A forming mechanism is slidably disposed on top of the two mounting plates;

[0007] A drawing mechanism is fixedly mounted on the transmission mechanism. The transmission mechanism drives the drawing mechanism to move back and forth to complete the drawing of the copper tube. During the movement of the drawing mechanism, the forming mechanism is pushed to move and achieve automatic positioning so as to draw and form the copper tube.

[0008] An adjustment mechanism is fixedly disposed between the two mounting plates;

[0009] Two long core rods are symmetrically fixed on the adjustment mechanism for drawing and deforming the copper tube. The adjustment mechanism switches and adjusts the positions of the two long core rods, and automatically releases the positioning of the forming mechanism during the adjustment of the two long core rods, thereby ensuring the normal switching of the positions of the two long core rods.

[0010] The oil collection tank is fixedly connected between the two mounting plates, located between the transmission mechanism and the adjustment mechanism, and below the forming mechanism.

[0011] Furthermore, the transmission mechanism includes two transmission shafts symmetrically rotatably connected between two mounting plates. Each transmission shaft is fixedly fitted with a sprocket, and the same chain is driven and fitted on the two sprockets. A pulling mechanism is fixedly connected to the chain. A servo motor is fixedly connected to the outer side of one of the mounting plates. The output shaft of the servo motor rotates through one side of the mounting plate and is fixedly connected to one end of one of the transmission shafts.

[0012] Furthermore, the pulling mechanism includes a pulling seat fixedly connected to the upper surface of the chain. A support plate is fixedly connected to the top of the pulling seat, and the support plate extends outward from the side near the forming mechanism. Its extended end intermittently abuts against the forming mechanism. Two clamping blocks are symmetrically slidably connected to the top of the support plate. A slider is slidably connected to the top of the support plate. Two connecting rods are symmetrically rotatably connected to the top of the slider, and the other ends of the two connecting rods are rotatably connected to one side of the two clamping blocks respectively. A cylinder is fixedly connected to the top of the support plate, and the output shaft of the cylinder is fixedly connected to one side of the slider.

[0013] Furthermore, the molding mechanism includes a sliding plate slidably connected to the top of the two mounting plates. A mold base is fixedly connected to the top of the sliding plate, and the sliding plate intermittently abuts against the extended end of the support plate. Two strip plates are fixedly connected to the top of the two mounting plates on opposite sides, and the tops of the two strip plates are flush with the tops of the two mounting plates. The top sides of the sliding plate extend to the two strip plates respectively. A fixing block is fixedly connected to the edge of the top of the two strip plates near the support plate. A sliding rod is slidably connected through one side of each fixing block. One end of each sliding rod is fixedly connected to one side of the sliding plate. A first return spring is sleeved on the outer wall of each sliding rod, and the two ends of the first return spring are fixedly connected to the end of the corresponding sliding rod away from the sliding plate and the side of the fixing block away from the sliding plate, respectively.

[0014] Furthermore, two positioning rods slide symmetrically through the top two sides of the sliding plate, and the bottom ends of the two positioning rods abut against the top of the two strip plates respectively. The outer walls of the two positioning rods are fitted with tension springs, and the two ends of the tension springs are fixedly connected to the top of the positioning rods and the top of the sliding plate respectively. The top side of the two strip plates is provided with positioning holes for use with the positioning rods.

[0015] Furthermore, each of the two mounting plates has a sliding hole on one side, and the same movable plate is slidably connected in the two sliding holes. The movable plate is in transmission cooperation with the adjustment mechanism. Two top rods are symmetrically fixed through the top of the movable plate. The top ends of the two top rods extend upward from the bottom openings of the two positioning holes into the two positioning holes respectively. Support blocks are fixedly connected to the opposite sides of the two mounting plates. The bottom ends of the two top rods slide through the bottom of the two support blocks and extend downward. A second return spring is sleeved on the outer wall of each of the two top rods. The two ends of the second return spring are fixedly connected to the bottom end of the corresponding top rod and the bottom of the support block respectively.

[0016] Furthermore, the adjustment mechanism includes a vertical plate fixedly connected between two mounting plates. One side of the vertical plate extends upward and is rotatably connected to a rotating plate. Two long core rods are fixedly connected vertically and vertically symmetrically to the side of the rotating plate away from the vertical plate. The side of the vertical plate away from the rotating plate is provided with a driving component for rotating the rotating plate and adjusting it. The driving component also drives the movable plate to move upward.

[0017] Furthermore, the driving component includes a drive motor fixedly connected to one side of the vertical plate, a small gear fixedly sleeved on the output shaft of the drive motor, and a rotating shaft fixedly connected to the side of the rotating plate near the vertical plate. One end of the rotating shaft rotates through one side of the vertical plate and is fixedly sleeved with a large gear that meshes with the small gear.

[0018] Furthermore, a rotating rod is rotatably connected through one side of the bottom of the vertical plate, and the same connecting plate is fixedly connected between the two mounting plates. One end of the rotating rod is rotatably connected to one side of the connecting plate. A driven pulley is fixedly sleeved on the outer wall of the end of the rotating rod away from the connecting plate, and a driving pulley is fixedly sleeved on the outer wall of the rotating shaft. The driving pulley and the driven pulley are driven by the same synchronous belt.

[0019] Furthermore, a fixed ring is fixedly sleeved on one side of the outer wall of the rotating rod, located directly below the movable plate. The outer wall of the fixed ring is integrally formed with two symmetrically arranged actuating rods that intermittently abut against the bottom of the movable plate.

[0020] The beneficial effects of this invention are as follows:

[0021] This invention, by using two intermittently alternating long mandrels, eliminates the intermediate loading and waiting time compared to traditional devices, significantly improving processing efficiency and overall practicality. The entire process is highly automated; the support plate automatically moves the mold base, allowing the copper tube's pressing tip to automatically pass through the mold base, completing the clamping and pulling operation. Furthermore, the positions of the two long mandrels are automatically adjusted and switched, and during the adjustment process, the mold base is automatically released from its limiting position, allowing it to automatically reset and ensuring the normal switching between the two long mandrels. Attached Figure Description

[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0025] Figure 3 This is a perspective view of the connection structure of the mounting plate, transmission mechanism, and pulling mechanism of the present invention;

[0026] Figure 4 This is a perspective view of the overall structure of the drawing mechanism of the present invention;

[0027] Figure 5 This is a perspective view of the overall structure of the molding mechanism of the present invention;

[0028] Figure 6 This is an exploded three-dimensional view of the overall structure of the molding mechanism of the present invention;

[0029] Figure 7 This is a perspective view of the overall structure of the adjustment mechanism of the present invention;

[0030] Figure 8 This is a perspective view of the connection structure of the forming mechanism, drawing mechanism and adjusting mechanism of the present invention;

[0031] Figure 9 This is a bottom perspective view of the connection structure between the molding mechanism and the adjustment mechanism of the present invention;

[0032] Figure 10 This is a bottom perspective view of the overall structure of the present invention;

[0033] Figure 11 For the present invention Figure 10 Enlarged view of the structure of part A in the middle.

[0034] Reference numerals: 10, mounting plate; 101, sliding hole; 20, transmission mechanism; 201, transmission shaft; 202, servo motor; 203, sprocket; 204, chain; 30, forming mechanism; 301, strip plate; 3011, positioning hole; 302, sliding plate; 303, mold base; 304, fixing block; 305, sliding rod; 306, first return spring; 307, positioning rod; 308, tension spring; 309, movable plate; 310, support block; 311, push rod; 312, second return spring; 40. Pulling mechanism; 401, Pulling seat; 402, Support plate; 403, Clamping block; 404, Cylinder; 405, Slider; 406, Connecting rod; 50, Adjusting mechanism; 501, Vertical plate; 502, Connecting plate; 503, Rotating plate; 504, Drive motor; 505, Pinion; 506, Rotating shaft; 507, Large gear; 508, Driving pulley; 509, Rotating rod; 510, Driven pulley; 511, Synchronous belt; 512, Fixed ring; 513, Actuating rod; 60, Oil collection tank seat; 70, Long core rod. Detailed Implementation

[0035] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] Example 1: As Figures 1-3As shown, the low-frequency drawing device for thin-walled copper tubes includes two mounting plates 10, a transmission mechanism 20, a forming mechanism 30, a drawing mechanism 40, an adjusting mechanism 50, an oil collection tank 60, and two long core rods 70. The two mounting plates 10 are symmetrically arranged, and the transmission mechanism 20 is located between the two mounting plates 10. The forming mechanism 30 is slidably mounted on the top of the two mounting plates 10. The drawing mechanism 40 is fixedly mounted on the transmission mechanism 20, and the transmission mechanism 20 drives the drawing mechanism 40 to move back and forth to complete the drawing of the copper tube. During the movement of the drawing mechanism 40, it pushes the forming mechanism 30 to move and achieve automatic positioning, so as to draw and shape the copper tube. The adjusting mechanism 50 is fixedly located between the two mounting plates 10. Two long mandrels 70 are symmetrically fixed on the adjusting mechanism 50 for drawing and deforming the copper tube. The adjusting mechanism 50 switches the positions of the two long mandrels 70, and automatically releases the positioning of the forming mechanism 30 during the adjustment process, thus ensuring the normal switching of the positions of the two long mandrels 70. The oil collecting tank seat 60 is fixedly connected between the two mounting plates 10, located between the transmission mechanism 20 and the adjusting mechanism 50, and below the forming mechanism 30.

[0037] In one aspect of this embodiment, the transmission mechanism 20 includes two transmission shafts 201 symmetrically rotatably connected between two mounting plates 10. Each transmission shaft 201 is fixedly fitted with a sprocket 203, and the same chain 204 is driven onto both sprockets 203. A pulling mechanism 40 is fixedly connected to the chain 204. A servo motor 202 is fixedly connected to the outer side of one of the mounting plates 10. The output shaft of the servo motor 202 rotatably passes through one side of the mounting plate 10 and is fixedly connected to one end of one of the transmission shafts 201. When the servo motor 202 is started, one of the transmission shafts 201 rotates, simultaneously rotating the corresponding sprocket 203. The chain 204 is then driven by the transmission of the two sprockets 203, thereby moving the pulling mechanism 40 to complete the pulling of the copper tube.

[0038] This invention can be used in the field of low-frequency drawing devices for thin-walled copper tubes, and can also be applied to other fields of this invention.

[0039] Example 2: This example is a further improvement on the previous example: as follows Figures 1-4As shown, the drawing mechanism 40 includes a drawing seat 401 fixedly connected to the upper surface of the chain 204. A support plate 402 is fixedly connected to the top of the drawing seat 401, and the support plate 402 extends outward from the side near the forming mechanism 30, with its extended end intermittently abutting against the forming mechanism 30. Two clamping blocks 403 are symmetrically slidably connected to the top of the support plate 402, and a slider 405 is slidably connected to the top of the support plate 402. Two connecting rods 406 are symmetrically rotatably connected to the top of the slider 405, and the other ends of the two connecting rods 406 are rotatably connected to one side of the two clamping blocks 403 respectively. A cylinder 404 is fixedly connected to the top of the support plate 402, and the output shaft of the cylinder 404 is fixedly connected to one side of the slider 405. When the tip of the copper tube passes through the forming mechanism 30, the entire drawing mechanism 40 moves under the drive of the chain 204 to be close to and in contact with the forming mechanism 30. At this time, the tip of the copper tube is located between the two clamping blocks 403. Then, cylinder 404 starts and drives slider 405 to slide. At the same time, two connecting rods 406 drive two clamping blocks 403 to move closer to each other, completing the clamping of the copper tube tip. Next, servo motor 202 starts again and drives chain 204 to reverse the transmission, causing puller 401 to move away from forming mechanism 30 along chain 204. This, in turn, drives clamping block 403 to move through support plate 402, thereby realizing the pulling operation of copper tube.

[0040] Example 3: This example is a further improvement on the previous example: as follows Figures 1-11As shown, the molding mechanism 30 includes a sliding plate 302 slidably connected to the top of two mounting plates 10. A mold base 303 is fixedly connected to the top of the sliding plate 302, and the sliding plate 302 intermittently abuts against the extended end of the support plate 402. Two strip plates 301 are fixedly connected to the top of each of the two mounting plates 10 on opposite sides, and the tops of the two strip plates 301 are flush with the tops of the two mounting plates 10. The top sides of the sliding plate 302 extend onto the two strip plates 301 respectively. Fixed blocks 304 are fixedly connected to the top edge of plate 301 near the support plate 402. Sliding rods 305 are slidably connected to one side of each fixed block 304. One end of each sliding rod 305 is fixedly connected to one side of the sliding plate 302. A first return spring 306 is sleeved on the outer wall of each sliding rod 305. The two ends of the first return spring 306 are fixedly connected to the end of the corresponding sliding rod 305 away from the sliding plate 302 and the side of the fixed block 304 away from the sliding plate 302, respectively. When the pull seat 401 moves the support plate 402 close to the mold base 303, the extended end of the support plate 402 abuts against one side of the sliding plate 302. As the support plate 402 continues to move, it drives the sliding plate 302 to slide on the mounting plate 10, and at the same time drives the mold base 303 to move, so that the pressing tip of the copper tube automatically passes through the mold base 303 and extends between the two clamping blocks 403. During the movement of the sliding plate 302, it simultaneously drives the two sliding rods 305 to move and compresses the first return spring 306.

[0041] In one aspect of this embodiment, two positioning rods 307 symmetrically slide through the top sides of the sliding plate 302, and the bottom ends of the two positioning rods 307 respectively abut against the tops of the two strip plates 301. A tension spring 308 is sleeved on the outer wall of each positioning rod 307, and both ends of the tension spring 308 are fixedly connected to the top ends of the positioning rods 307 and the top of the sliding plate 302, respectively. A positioning hole 3011 for use with the positioning rods 307 is provided on one side of the top of each of the two strip plates 301. When the support plate 402 pushes the sliding plate 302 to move, it simultaneously drives the positioning rods 307 to move. When the bottom end of the positioning rod 307 corresponds to the positioning hole 3011, under the elastic force of the tension spring 308, the positioning rod 307 moves downward and is positioned and inserted into the positioning hole 3011, thereby achieving the automatic positioning effect of the sliding plate 302. By positioning the sliding plate 302, after the clamping block 403 clamps the copper tube tip and drives the copper tube to be pulled and moved, the mold base 303 will not follow the movement of the support plate 402 to reset, thereby ensuring the normal pulling operation of the copper tube.

[0042] In one aspect of this embodiment, each of the two mounting plates 10 has a sliding hole 101 on one side. A movable plate 309 is slidably connected within each of the two sliding holes 101, and the movable plate 309 is in a transmission cooperation with the adjustment mechanism 50. Two push rods 311 are symmetrically fixedly connected to the top of the movable plate 309. The top ends of the two push rods 311 extend upwards from the bottom openings of the two positioning holes 3011 into the two positioning holes 3011. Support blocks 310 are fixedly connected to the sides of the two mounting plates 10 that are far apart from each other. The bottom ends of the two push rods 311 slide through the bottom of the two support blocks 310 and extend downwards. A second return spring 312 is sleeved on the outer wall of each of the two push rods 311. The two ends of the second return spring 312 are fixedly connected to the bottom end of the corresponding push rod 311 and the bottom of the support block 310, respectively. When the movable plate 309 slides upwards within the sliding hole 101, it simultaneously drives the push rods 311 to move upwards, simultaneously compressing the second return spring 312. After the positioning rod 307 is inserted into the positioning hole 3011, it can limit the movement of the sliding plate 302. The bottom end of the positioning rod 307 is in contact with the top end of the push rod 311. When the push rod 311 moves upward, it can push the positioning rod 307 to move upward synchronously. When the positioning rod 307 is completely pushed out of the positioning hole 3011, the sliding plate 302 will move and reset under the elastic force of the first reset spring 306, thereby realizing the effect of automatic reset of the mold base 303.

[0043] Example 4: This example is a further improvement on the previous example: as follows Figures 1-11 As shown, the adjustment mechanism 50 includes a vertical plate 501 fixedly connected between two mounting plates 10. One side of the vertical plate 501 extends upward and is rotatably connected to a rotating plate 503. Two long core rods 70 are symmetrically fixedly connected to the rotating plate 503 on the side away from the vertical plate 501. The side of the vertical plate 501 away from the rotating plate 503 is provided with a driving component for rotating and adjusting the rotating plate 503, and the driving component simultaneously drives the movable plate 309 to move upward. The two long core rods 70 are symmetrically fixedly connected to the rotating plate 503. The lower long core rod 70 corresponds exactly to the mold base 303, and the height of the upper long core rod 70 is higher than that of the mold base 303. When the copper tube on the lower long core rod 70 is being pulled, the operator can use the pulling time to straighten another copper tube to be pulled and directly insert it onto the upper long core rod 70. By using the two long core rods 70 intermittently, the waiting time can be shortened and the pulling efficiency can be greatly improved. Then, the rotating plate 503 is rotated 180 degrees by the drive component, which can switch the upper and lower positions of the two long core rods 70. The copper tube on the upper long core rod 70 is moved to the lower position and automatically aligned with the mold base 303, and then pulled out. The lower long core rod 70 is moved to the upper position and the next copper tube is inserted. This cycle can be repeated.

[0044] In one aspect of this embodiment, the driving component includes a drive motor 504 fixedly connected to one side of the vertical plate 501. A small gear 505 is fixedly sleeved on the output shaft of the drive motor 504. A rotating shaft 506 is fixedly connected to the side of the rotating plate 503 near the vertical plate 501. One end of the rotating shaft 506 rotatably passes through one side of the vertical plate 501 and is fixedly sleeved with a large gear 507 that meshes with the small gear 505. When the drive motor 504 is started, the meshing motion of the small gear 505 and the large gear 507 drives the rotating shaft 506 to rotate, which in turn drives the rotating plate 503 to rotate. By controlling and setting the drive motor 504, the entire drawing mechanism 40 can be made so that after the copper tube is drawn, the drive motor 504 automatically starts and drives the rotating plate 503 to rotate 180 degrees and then stops rotating, thereby causing the positions of the two long core rods 70 to be interchanged. A rotating rod 509 is rotatably connected to one side of the bottom of the vertical plate 501. A connecting plate 502 is fixedly connected between the two mounting plates 10, and one end of the rotating rod 509 is rotatably connected to one side of the connecting plate 502. A driven pulley 510 is fixedly sleeved on the outer wall of the end of the rotating rod 509 away from the connecting plate 502. A driving pulley 508 is fixedly sleeved on the outer wall of the rotating shaft 506. The driving pulley 508 and the driven pulley 510 are connected by the same synchronous belt 511. When the rotating shaft 506 rotates, driving the rotating plate 503 to rotate, the rotating rod 509 can be simultaneously driven to rotate via the synchronous belt 511. A fixing ring 512 is fixedly sleeved on one side of the outer wall of the rotating rod 509, located directly below the movable plate 309. Two actuating rods 513 are integrally formed and symmetrically provided on the outer wall of the fixing ring 512, intermittently contacting the bottom of the movable plate 309. When the drive motor 504 is started, it drives the rotating shaft 506 to rotate 180 degrees, which in turn drives the rotating rod 509 to rotate 180 degrees. Simultaneously, the rotating rod 509 drives the actuating rod 513 to rotate via the fixed ring 512. When one end of the actuating rod 513 contacts the bottom of the movable plate 309, it moves the movable plate 309 upwards, which in turn moves the push rod 311 upwards and compresses the second return spring 312, thus releasing the brake on the sliding plate 302. Since the mold base 303 moves one end synchronously during the movement of the support plate 402, this is to allow the copper tube's pressure tip to automatically pass through the mold base 303 and be clamped by the clamping block 403, thereby completing the pulling operation. However, after the upper long core rod 70 is fitted with the copper tube, the pressure tip of the copper tube overlaps with the position of the mold base 303. Therefore, directly swapping the positions of the two long core rods 70 would cause the pressure tip of the upper copper tube to directly abut against the mold base 303, making direct rotational swapping impossible. Therefore, by releasing the brake on the mold base 303, it is automatically reset in advance to avoid the copper tube from contacting the mold base 303, thereby ensuring the positional adjustment between the two long core rods 70.By setting two levers 513, the movable plate 309 can be pushed upward by the levers 513 every time the rotating rod 509 rotates 180 degrees, thereby realizing the automatic reset of the mold base 303.

[0045] However, as is well known to those skilled in the art, the working principles and wiring methods of the servo motor 202, cylinder 404 and drive motor 504 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A low-frequency drawing device for thin-walled copper tubes, characterized in that, include: Two symmetrically arranged mounting plates (10); A transmission mechanism (20) is disposed between the two mounting plates (10); The forming mechanism (30) is slidably disposed on the top of the two mounting plates (10); The drawing mechanism (40) is fixed on the transmission mechanism (20). The transmission mechanism (20) drives the drawing mechanism (40) to move back and forth to complete the drawing of the copper tube. During the movement of the drawing mechanism (40), the forming mechanism (30) is pushed to move and achieve automatic positioning so as to draw and form the copper tube. An adjustment mechanism (50) is fixedly disposed between the two mounting plates (10). Each of the two mounting plates (10) has a sliding hole (101) on one side. The same movable plate (309) is slidably connected in the two sliding holes (101), and the movable plate (309) is in transmission cooperation with the adjustment mechanism (50). Two long core rods (70) are symmetrically fixed on the adjustment mechanism (50) for pulling and deforming the copper tube. The adjustment mechanism (50) switches and adjusts the position of the two long core rods (70). The adjustment mechanism (50) includes a vertical plate (501) fixedly connected between two mounting plates (10). One side of the vertical plate (501) extends upward and is rotatably connected to a rotating plate (503). The two long core rods (70) are symmetrically fixedly connected to the side of the rotating plate (503) away from the vertical plate (501). The side of the vertical plate (501) away from the rotating plate (503) is provided with a driving component for rotating the rotating plate (503). The driving component also drives the movable plate (309) to move upward. A rotating rod (509) is rotatably connected through the bottom of one side of the vertical plate (501). The two mounting plates (10) are fixedly connected to each other. The same connecting plate (502) is used, and one end of the rotating rod (509) is rotatably connected to one side of the connecting plate (502). The outer wall of the rotating rod (509) away from the connecting plate (502) is fixedly fitted with a driven pulley (510). The outer wall of the rotating shaft (506) is fixedly fitted with a driving pulley (508). The driving pulley (508) and the driven pulley (510) are connected with the same synchronous belt (511). The outer wall of one side of the rotating rod (509) is fixedly fitted with a fixed ring (512) located directly below the movable plate (309). The outer wall of the fixed ring (512) is integrally formed with two symmetrically arranged actuating rods (513) that intermittently abut against the bottom of the movable plate (309). During the adjustment of the two long core rods (70), the positioning of the forming mechanism (30) is automatically released, thereby ensuring the normal switching of the positions of the two long core rods (70). The oil collection tank seat (60) is fixedly connected between the two mounting plates (10) and located between the transmission mechanism (20) and the adjustment mechanism (50), and is located below the forming mechanism (30).

2. The low-frequency drawing device for thin-walled copper tubes as described in claim 1, characterized in that, The transmission mechanism (20) includes two transmission shafts (201) symmetrically rotatably connected between two mounting plates (10). A sprocket (203) is fixedly sleeved on each of the two transmission shafts (201). The same chain (204) is driven on the two sprockets (203). A pulling mechanism (40) is fixedly connected to the chain (204). A servo motor (202) is fixedly connected to the outer side of one of the mounting plates (10). The output shaft of the servo motor (202) rotates through one side of the mounting plate (10) and is fixedly connected to one end of one of the transmission shafts (201).

3. The low-frequency drawing device for thin-walled copper tubes as described in claim 2, characterized in that, The pulling mechanism (40) includes a pulling seat (401) fixedly connected to the upper surface of the chain (204). A support plate (402) is fixedly connected to the top of the pulling seat (401), and the support plate (402) extends outward from the side near the forming mechanism (30). Its extended end intermittently abuts against the forming mechanism (30). Two clamping blocks (403) are symmetrically slidably connected to the top of the support plate (402). A slider (405) is slidably connected to the top of the support plate (402). Two connecting rods (406) are symmetrically rotatably connected to the top of the slider (405), and the other ends of the two connecting rods (406) are rotatably connected to one side of the two clamping blocks (403) respectively. A cylinder (404) is fixedly connected to the top of the support plate (402), and the output shaft of the cylinder (404) is fixedly connected to one side of the slider (405).

4. The low-frequency drawing device for thin-walled copper tubes as described in claim 3, characterized in that, The forming mechanism (30) includes a sliding plate (302) slidably connected to the top of two mounting plates (10). A mold base (303) is fixedly connected to the top of the sliding plate (302), and the sliding plate (302) and the extended end of the support plate (402) intermittently abut against each other. Two strip plates (301) are fixedly connected to the top of each side of the two mounting plates (10) that are far apart from each other, and the top of the two strip plates (301) is flush with the top of the two mounting plates (10). The top sides of the sliding plate (302) extend to the two strip plates (301) respectively. (301) has a fixed block (304) fixedly connected to the edge of the top of the support plate (402). A sliding rod (305) is slidably connected through one side of each of the two fixed blocks (304). One end of each sliding rod (305) is fixedly connected to one side of the sliding plate (302). A first return spring (306) is sleeved on the outer wall of each sliding rod (305). The two ends of the first return spring (306) are fixedly connected to the end of the corresponding sliding rod (305) away from the sliding plate (302) and the side of the fixed block (304) away from the sliding plate (302), respectively.

5. The low-frequency drawing device for thin-walled copper tubes as described in claim 4, characterized in that, Two positioning rods (307) slide symmetrically through the top two sides of the sliding plate (302), and the bottom ends of the two positioning rods (307) abut against the top of the two strip plates (301). The outer walls of the two positioning rods (307) are fitted with tension springs (308), and the two ends of the tension springs (308) are fixedly connected to the top of the positioning rods (307) and the top of the sliding plate (302), respectively. The top side of the two strip plates (301) is provided with positioning holes (3011) that cooperate with the positioning rods (307).

6. The low-frequency drawing device for thin-walled copper tubes as described in claim 5, characterized in that, The top of the movable plate (309) is symmetrically fixed with two top rods (311). The top ends of the two top rods (311) extend upward from the bottom openings of the two positioning holes (3011) into the two positioning holes (3011). The two mounting plates (10) are fixedly connected to the side away from each other with a support block (310). The bottom ends of the two top rods (311) slide through the bottom of the two support blocks (310) and extend downward. The outer walls of the two top rods (311) are fitted with a second return spring (312). The two ends of the second return spring (312) are fixedly connected to the bottom end of the corresponding top rod (311) and the bottom of the support block (310) respectively.

7. The low-frequency drawing device for thin-walled copper tubes as described in claim 6, characterized in that, The driving component includes a drive motor (504) fixedly connected to one side of the vertical plate (501), a small gear (505) fixedly sleeved on the output shaft of the drive motor (504), and a rotating shaft (506) fixedly connected to the side of the rotating plate (503) near the vertical plate (501). One end of the rotating shaft (506) rotates through one side of the vertical plate (501) and is fixedly sleeved with a large gear (507) that meshes with the small gear (505).

Images