An automatic die-changing system for a two-car, three-position press

Abstract

This utility model discloses an automatic mold changing system for a press with two carriages and three positions, relating to the field of refrigerator manufacturing technology. The system includes a frame and a guide rail. Two mold changing carriages are mounted on the guide rail, and a switching mechanism is provided between the two carriages. The traction mechanism includes a guide frame, with a synchronizing rod at one end and driven sprockets at both ends of the synchronizing rod. Multiple guide sprockets are mounted on the guide frame, and driven chains drive the guide sprockets and driven sprockets. A plug-in assembly is also mounted on the guide frame. The mold can be connected to the moving frame through the cooperation of the plug and slot. A second servo motor drives the synchronizing rod to rotate, which in turn drives the two driven chains to move, causing the moving frame to move the mold along the guide frame. This facilitates mold disassembly and installation without manual pushing. Mold changing can be prepared during press operation using the two mold changing carriages, greatly saving mold changing time, improving production efficiency, and reducing labor costs.

Description

Technical Field

[0001] This utility model relates to the field of refrigerator manufacturing technology, specifically to an automatic mold changing system for a two-car, three-position press. Background Technology

[0002] The application of compressors in refrigerator production spans the entire process from "core structural components → refrigeration components → functional accessories." They are a key equipment link that determines the structural stability, refrigeration efficiency, and assembly precision of refrigerators, and are irreplaceable, especially in processes such as "forming, punching, and shaping."

[0003] Die changing in presses is an indispensable and essential step in refrigerator stamping production. It is both a fundamental guarantee for adapting to the differentiated processing requirements of various components and ensuring product quality, and a core means for achieving flexible production of multiple models and optimizing efficiency and costs. Without die changing operations, the stamping line cannot produce diverse refrigerator parts, nor can it cope with die wear and changes in market demand, ultimately affecting refrigerator production delivery and product performance.

[0004] When changing the mold on a press, the old mold must be removed first, and then a trial production must be conducted after replacing it with the new mold. Only after the test is successful can formal production begin. The weight of the press mold varies considerably depending on its size, material, and structure, generally ranging from several hundred kilograms to several tons. Some existing presses have loading and unloading stations on the front and rear sides. During mold changes, the mold is usually manually removed from the press, pushed to the loading and unloading station, and then removed by a forklift. A new mold is then placed at the loading and unloading station and manually pushed back into the press. However, due to the large weight of the mold and the large size and limited precision of the forklift, frequent adjustments are required during the changeover process, resulting in a long time consumption. During this period, the press must be stopped, reducing mold-changing efficiency and increasing labor costs. Utility Model Content

[0005] The purpose of this invention is to provide an automatic mold changing system for a two-car, three-position press, in order to overcome the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic mold changing system for a press with two carriages and three positions, including a frame, a guide rail fixedly mounted on one side of the frame, two mold changing carriages fixedly connected on the guide rail, and a shifting mechanism between the two mold changing carriages; a traction mechanism for moving the mold, including a guide frame fixedly mounted on the frame, a synchronizing rod rotatably mounted at one end of the guide frame, driven sprockets fixedly mounted at both ends of the synchronizing rod, multiple guide sprockets rotatably mounted on the guide frame, a driven chain driving between the guide sprockets and the driven sprockets, and a plug-in assembly mounted on the guide frame.

[0007] Preferably, the switching mechanism includes a connecting plate fixedly disposed between two mold changing carriages, a first servo motor fixedly disposed on the connecting plate, a toothed plate fixedly disposed on the side wall of the guide rail, and a gear meshing with the toothed plate fixedly disposed at the output end of the first servo motor.

[0008] Preferably, a second servo motor is also fixedly mounted on the frame, and a drive sprocket is fixedly mounted on both the output end of the second servo motor and the synchronizing rod, and a drive chain is driven between the two drive sprockets.

[0009] Preferably, the insertion assembly includes a movable frame slidably mounted on a guide frame, a cylinder fixedly mounted on the movable frame, and an insertion rod slidably mounted on the movable frame. The two ends of the movable frame are fixedly connected to two driven chains corresponding to each other.

[0010] Preferably, each mold changing vehicle is fixedly equipped with a support frame on both sides, and each frame is rotatably equipped with multiple support rollers.

[0011] Preferably, each of the support frames has multiple side guide wheels rotatably mounted on its side wall.

[0012] Preferably, limit rods are fixedly provided at both ends of each support frame.

[0013] In the above technical solution, this utility model provides a two-car, three-position automatic mold changing system for presses, which has the following beneficial effects: the mold can be connected to the moving frame through the cooperation of the insert rod and the slot; the second servo motor drives the synchronous rod to rotate, which in turn drives the two driven chains to move, so that the moving frame drives the mold to move along the guide frame, which facilitates the disassembly and installation of the mold without manual pushing. The mold changing can be prepared by the two mold changing carts when the press is working, which greatly saves the mold changing time, improves production efficiency, and reduces labor costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0016] Figure 2 A schematic diagram of the connecting plate provided in an embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the mold changing vehicle provided in an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the toothed plate provided in an embodiment of the present utility model;

[0019] Figure 5 A schematic diagram of the structure of the guide frame provided in an embodiment of this utility model;

[0020] Figure 6 A schematic diagram of the support frame provided in an embodiment of this utility model;

[0021] Figure 7 Provided for the embodiments of this utility model Figure 4 Enlarged view of the structure at point A in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Press station; 2. Loading and unloading station; 3. Mold; 4. Frame; 10. Guide rail; 11. Mold changing carriage; 12. Connecting plate; 13. Gear plate; 14. First servo motor; 15. Gear; 20. Guide frame; 21. Second servo motor; 22. Synchronizing rod; 23. Drive sprocket; 24. Drive chain; 25. Driven sprocket; 26. Guide sprocket; 27. Driven chain; 28. Moving frame; 29. ​​Cylinder; 30. Insert rod; 31. Slot; 32. Support frame; 33. Support roller; 34. Limiting rod; 35. Side guide wheel. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] Please see Figure 1-7 An automatic mold changing system for a two-car, three-position press, comprising a frame 4, a guide rail 10 fixedly mounted on one side of the frame 4, two mold changing carriages 11 fixedly connected on the guide rail 10, and a shifting mechanism between the two mold changing carriages 11; a traction mechanism for moving the mold 3, including a guide frame 20 fixedly mounted on the frame 4, a synchronizing rod 22 rotatably mounted at one end of the guide frame 20, driven sprockets 25 fixedly mounted at both ends of the synchronizing rod 22, multiple guide sprockets 26 rotatably mounted on the guide frame 20, driven chains 27 driving between the guide sprockets 26 and the driven sprockets 25, and plug-in components mounted on the guide frame 20; Figure 1 As shown, one end of the guide frame 20 extends to the left end of the left loading / unloading station 2, and the other end extends to the left end of the right loading / unloading station 2. The synchronizing rod 22 is located at the end of the guide frame 20 away from the guide rail 10, combined with... Figure 5The wrap angles of the guide sprocket 26 and the driven chain 27 are both greater than or equal to 90 degrees. Two guide sprockets 26 are rotatably mounted on the frame 4. The frame 4 includes a press station 1. Loading and unloading stations 2 are located on both sides of the press station 1. Robots are mounted on the loading and unloading stations 2. A press (not shown in the diagram) is mounted on the press station 1. Guide rails 10 are located on the sides of the loading and unloading stations 2. Two mold-changing carts 11 each have two rows of wheels at their bottom. One row of wheels moves on the guide rail 10 and is limited by the guide rail 10, while the other row of wheels is supported on the workshop floor. One of the mold-changing carts 11 is used to hold the mold 3 to be replaced, and the other... A mold 3 is used to receive the removed mold. During operation, the designated mold changing carriage 11 is moved to a position aligned with the center of the press. Then, the mold 3 on the press is unlocked, and the plug-in assembly is activated to connect it with the mold 3. Then, the synchronizing rod 22 is rotated, which drives the driven sprocket 25 to rotate, thereby driving the chain to move. The chain drives the removed mold 3 to the empty mold changing carriage 11 through the plug-in assembly. Then, the two mold changing carriages 11 are moved by the switching mechanism to align the new mold 3 with the press. At this time, the plug-in assembly on the traction mechanism is connected to the new mold 3 again, and the chain drives the new mold 3 to move into the press, completing the automatic mold changing.

[0026] Specifically, the switching mechanism includes a connecting plate 12 fixedly disposed between two mold changing carriages 11. A first servo motor 14 is fixedly disposed on the connecting plate 12. A toothed plate 13 is fixedly disposed on the side wall of the guide rail 10. A gear 15 that meshes with the toothed plate 13 is fixedly disposed at the output end of the first servo motor 14. The toothed plate 13 is fixedly disposed on the side wall of the guide rail 10. The two mold changing carriages 11 are fixedly connected together through the connecting plate 12. The first servo motor 14 drives the gear 15 to rotate, thereby causing the connecting plate 12 to move along the guide rail 10 through the fixedly disposed toothed plate 13, thereby controlling the two mold changing carriages 11 to move simultaneously.

[0027] Specifically, a second servo motor 21 is fixedly installed on the frame 4. A drive sprocket 23 is fixedly installed on the output end of the second servo motor 21 and on the synchronization rod 22. A drive chain 24 is driven between the two drive sprockets 23. The second servo motor 21 drives the synchronization rod 22 to rotate through the drive sprockets 23 and the drive chain 24, thereby driving the two driven sprockets 25 to rotate, and then driving each driven chain 27 to run, so that the plug-in assembly moves. A set of guide sprockets 26 is provided on both sides of the second servo motor 21. A driven chain 27 is driven between each set of guide sprockets 26 and the corresponding driven sprocket 25.

[0028] Specifically, the insertion assembly includes a movable frame 28 slidably mounted on a guide frame 20. A cylinder 29 is fixedly mounted on the movable frame 28, and an insertion rod 30 is slidably mounted on the movable frame 28. Both ends of the movable frame 28 are fixedly connected to two driven chains 27, one-to-one. The piston end of the cylinder 29 is fixedly connected to the insertion rod 30. When the two driven chains 27 move, they can drive the movable frame 28 to move. At this time, the guide frame 20 guides and limits the movable frame 28. A slot 31 adapted to the insertion rod 30 is provided at the bottom of the mold 3. Figure 5 When changing mold 3, the moving frame 28 is first moved to the side of the mold 3 inside the press away from the guide rail 10 by the driven chain 27. At this time, the insertion rod 30 is aligned with the slot 31 on the mold 3. Then, the cylinder 29 is started to insert the insertion rod 30 into the slot 31. Then, the moving frame 28 is moved by the second servo motor 21. When installing mold 3, the moving frame 28 is moved to the end of the guide frame 20 close to the guide rail 10. At this time, the insertion rod 30 is aligned with the slot 31 of the mold 3 on the mold changing carriage 11. The cylinder 29 is started to insert the insertion rod 30 into the slot 31 and then move the mold 3. Note: For clarity, two moving frames 28 are shown in the figure, but in actual application, only one moving frame 28 is provided on the guide frame 20.

[0029] Specifically, each mold-changing carriage 11 has a support frame 32 fixedly installed on both sides, and each frame 4 has multiple rotatable rollers 33; such as Figure 3 As shown, two rows of rollers 33 are also rotatably mounted on the frame 4. The rollers 33 on the frame 4 are at the same height as the rollers 33 on the fixed frame. After the moving frame 28 inserts the rod 30 into the slot 31 of the mold 3, it drives the driven sprocket 25 to move through the second servo motor 21, thereby moving the mold 3. At this time, the rollers 33 can prevent the mold 3 from sliding and rubbing against the frame 4 and the support frame 32, which facilitates the movement of the mold 3.

[0030] Specifically, each support frame 32 has multiple side guide wheels 35 rotatably mounted on its side wall; when the mold 3 moves, the side guide wheels 35 can guide the mold 3 and prevent the mold 3 from rubbing against the side wall of the support frame 32.

[0031] Specifically, each support frame 32 is fixedly equipped with a limit rod 34 at both ends; such as Figure 6 As shown, Figure 6As shown, a pneumatic cylinder is connected to the bottom of the limiting rod 34 near the press side, which drives its lifting and lowering. A spring is installed between the bottom of the limiting rod 34 away from the press side and the support frame 32, allowing the limiting rod 34 to return to its original position. During installation, the mold 3 is first placed on the support roller 33 of the support frame 32, maintaining a certain distance from the limiting rod 34 near the press side. At this time, the limiting rod 34 near the press is pushed higher than the support roller 33 by the pneumatic cylinder, while the limiting rod 34 away from the press is pressed lower than the support roller 33. The roller 33 then pushes the mold 3 towards the press. Using the two limit rods 34 near the press as a reference, the slot 31 on the mold 3 can be quickly aligned with the plug rod 30 of the plug-in assembly. When the mold 3 abuts against the limit rod 34 near the press, the limit rod 34 away from the press is reset by a spring, thereby cooperating with the side guide wheel 35 to restrict the mold 3 on the mold changing carriage 11. When the mold changing carriage 11 carrying the new mold 3 is aligned with the press, the pneumatic cylinder is activated, driving its corresponding limit rod 34 to descend. When disassembling mold 3, the unloaded mold changing trolley 11 is first moved to be aligned with the press. The moving frame 28 is driven by the driven chain 27 to pull mold 3 out of the press and transport it to the unloaded mold changing trolley 11. At this time, the limiting rod 34 near the press is lower than the support roller 33. The moving mold 3 is limited by the limiting rod 34 away from the press. When placing a new mold 3, the mold 3 is limited by the limiting rod 34 near the press.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A two-car, three-position automatic die-changing system for a press, comprising a frame (4), characterized in that, A guide rail (10) is fixedly installed on one side of the frame (4), and two mold changing carriages (11) are fixedly connected on the guide rail (10). A shifting mechanism is provided between the two mold changing carriages (11). The traction mechanism, which is used to move the mold (3), includes a guide frame (20) fixedly mounted on the frame (4). A synchronizing rod (22) is rotatably mounted at one end of the guide frame (20). Driven sprockets (25) are fixedly mounted at both ends of the synchronizing rod (22). Multiple guide sprockets (26) are rotatably mounted on the guide frame (20). A driven chain (27) is driven between the guide sprockets (26) and the driven sprockets (25). A plug-in assembly is mounted on the guide frame (20).

2. The automatic die-changing system for a two-car, three-position press according to claim 1, characterized in that, The shifting mechanism includes a connecting plate (12) fixedly disposed between two mold changing carriages (11), a first servo motor (14) fixedly disposed on the connecting plate (12), a toothed plate (13) fixedly disposed on the side wall of the guide rail (10), and a gear (15) meshing with the toothed plate (13) fixedly disposed at the output end of the first servo motor (14).

3. The automatic die-changing system for a two-car, three-position press according to claim 1, characterized in that, A second servo motor (21) is also fixedly installed on the frame (4). A drive sprocket (23) is fixedly installed on the output end of the second servo motor (21) and on the synchronizing rod (22). A drive chain (24) is driven between the two drive sprockets (23).

4. The automatic die-changing system for a two-car, three-position press according to claim 1, characterized in that, The plug-in assembly includes a movable frame (28) slidably mounted on a guide frame (20), a cylinder (29) is fixedly mounted on the movable frame (28), and a plug rod (30) is slidably mounted on the movable frame (28). The two ends of the movable frame (28) are fixedly connected to two driven chains (27) in a one-to-one correspondence.

5. The automatic die-changing system for a two-car, three-position press according to claim 1, characterized in that, Each mold changing car (11) has a support frame (32) fixedly installed on both sides, and each frame (4) has multiple rollers (33) rotatably installed.

6. The automatic die-changing system for a two-car, three-position press according to claim 5, characterized in that, Each of the support frames (32) has multiple side guide wheels (35) rotatably mounted on its side wall.

7. The automatic die-changing system for a two-car, three-position press according to claim 5, characterized in that, Each of the support frames (32) is fixedly provided with a limit rod (34) at both ends.

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