Drawing, bending and forming die for back plate of refrigerator

Abstract

The utility model discloses a refrigerator back plate drawing, bending and forming die which comprises a frame, a sliding rod is fixedly installed in the frame, a connecting rod is installed on the outer surface of the sliding rod in a sliding mode, bending mechanisms are fixedly installed on the outer surface of the connecting rod, and a drawing mechanism is fixedly installed between the bending mechanisms. The drawing mechanism can be driven by the bending mechanism to move downwards together to be attached to the upper surface of the refrigerator back plate drawing and bending forming lower die, and the refrigerator back plate drawing and bending forming lower die is fixedly installed on the lower surface in the frame. According to the utility model, the bending mechanism and the drawing mechanism are arranged, so that bending and drawing of the refrigerator back plate are carried out simultaneously through linkage, separate operation is not needed, the bending mechanism and the drawing mechanism can continuously complete process steps, repeated movement and repositioning of workpieces between different dies are reduced, the production efficiency is improved, and the production cost is reduced. The labor intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of forming molds, in particular to a drawing and bending forming mold for a refrigerator back panel. Background Art

[0002] The back panel of the refrigerator is mainly formed through processes such as drawing, punching and bending.

[0003] Patent publication number CN220901511U discloses a refrigerator back panel bending mold, comprising a base panel and two support legs fixedly mounted on the bottom surface of the base panel. A fixing mechanism and a bending mechanism are disposed above the base panel; the fixing mechanism is located below the bending mechanism; the fixing mechanism comprises a fixing portion and an adjustment portion; the adjustment portion is located below the fixing portion; and the adjustment portion comprises an electric push rod and a sliding block. The fixing mechanism allows the back panel to be fixed during bending, and the position of the placement block can be adjusted during the fixing process, eliminating the need for manual movement of the back panel during bending, thereby reducing labor intensity. The fixing process can also accommodate back panels of varying thicknesses, resulting in fewer restrictions on use. The bending mechanism allows the back panel to be bent, and the vertical height of the two extrusion plates can be controlled during bending.

[0004] The above-mentioned refrigerator back panel bending and forming mold cannot perform the drawing operation at the same time as the refrigerator back panel is bent. Bending and drawing need to be performed in different processes. The production process is time-consuming because the workpiece needs to be readjusted after bending and then the drawing operation is performed, which reduces the efficiency of the production line, extends the production cycle, and increases labor costs and equipment occupancy time. Utility Model Content

[0005] The purpose of the utility model is to provide a drawing and bending forming mold for the back panel of a refrigerator, so as to solve the technical problem proposed in the above background technology that the drawing operation cannot be carried out simultaneously when the back panel of the refrigerator is bent, and the bending and drawing need to be carried out in different processes, which consumes time in the production process and affects production efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A drawing and bending forming mold for a refrigerator back panel comprises a frame, a sliding rod is fixedly installed in the frame, a connecting rod is slidably installed on the outer surface of the sliding rod, a bending mechanism is fixedly installed on the outer surface of the connecting rod, and a drawing mechanism is fixedly installed between the bending mechanisms. The drawing mechanism can be driven downward by the bending mechanism to fit with the upper surface of the drawing and bending forming lower mold for the refrigerator back panel, and the drawing and bending forming lower mold for the refrigerator back panel is fixedly installed on the lower surface of the frame.

[0008] As a further solution of the present invention, the bending mechanism includes a connecting frame, which is fixedly installed on the outer surface of the connecting rod, a first hydraulic rod is fixedly installed on the upper surface of the connecting frame, the piston rod of the first hydraulic rod is fixedly installed on the upper surface of the frame, and a bending plate is fixedly installed on the lower surface of the connecting frame.

[0009] As a further solution of the present invention, the bending plates are located on both sides of the drawing and bending lower die of the refrigerator back panel, and can be pushed by the first hydraulic rod to squeeze and bend the plates protruding from both sides of the drawing and bending lower die of the refrigerator back panel.

[0010] As a preferred solution of the present invention, the drawing mechanism includes a connecting plate, which is fixedly installed between two groups of connecting frames. A second hydraulic rod is fixedly installed on the lower surface of the connecting plate. The piston rod of the second hydraulic rod is flush with the upper die for drawing and bending the back panel of the refrigerator. A connecting arm is fixedly installed on the upper surface of the upper die for drawing and bending the back panel of the refrigerator. Both ends of the connecting arm are slidably installed in two groups of U-shaped cylinders, and the U-shaped cylinder is fixedly installed at one end of the connecting frame.

[0011] As a further preferred embodiment of the present invention, a protrusion is provided on the lower surface of the upper die for drawing and bending the back panel of the refrigerator, and a groove is provided on the upper surface of the lower die for drawing and bending the back panel of the refrigerator. The protrusion of the upper die for drawing and bending the back panel of the refrigerator can be pressed into the groove of the lower die for drawing and bending the back panel of the refrigerator, so that the material between them can be stretched in the die to form a preliminary shape.

[0012] As a further solution of the present invention, a spring is fixedly connected to the upper surface of the U-shaped cylinder, and the lower surface of the spring is fixedly connected to the upper surface of the connecting arm, so that the connecting arm can drive the upper mold of the drawing and bending forming of the refrigerator back panel to press the plate placed on the surface of the lower mold of the drawing and bending forming of the refrigerator back panel through the elastic force exerted by the spring.

[0013] Compared with the prior art, the beneficial effects of the draw-bending forming die for the refrigerator back panel of the utility model are:

[0014] 1. When performing the draw bending operation on the back panel of the refrigerator, the plate can be slid from one end of the frame into the upper surface of the draw bending forming lower die of the refrigerator back panel, and then the bending mechanism can be started to drive the drawing mechanism on the outer surface of the connecting rod to move vertically downward until the drawing mechanism is driven to move to the corresponding distance between the drawing mechanism and the draw bending forming lower die of the refrigerator back panel. After that, the bending mechanism will stop moving downward and the drawing mechanism will be started at the same time, and the drawing mechanism will be pushed and pressed against the upper surface of the plate placed on the surface of the draw bending forming lower die of the refrigerator back panel, and then the plate can be stretched in the mold by applying pressure to form a preliminary shape, and then the drawing mechanism can be compound pulled back, and after the pushing end of the drawing mechanism is reset, the pressing end is It is in a floating state and is pressed against the upper surface of the plate by elastic force, so that a clamping force can be applied to the stretched plate. Then the bending mechanism can be started again to continue to move downward to extrude and bend the plate protruding from both sides of the lower die of the drawing and bending forming of the back panel of the refrigerator into a U shape. In the process of continuous downward movement of the bending mechanism, the top pressure end of the drawing mechanism will be driven to move upward automatically and the elastic force applied to the plate will be gradually increased, thereby realizing the linkage of bending and drawing, without the need for separate operation, so that the bending mechanism and the drawing mechanism can complete these two process steps continuously, reducing the multiple movements and repositioning of the workpiece between different molds, improving production efficiency, saving production time, reducing labor intensity, and making the production process smoother.

[0015] 2. When in use, after the plate is placed on the upper surface of the lower die for drawing and bending the back panel of the refrigerator, the first hydraulic rod can be started to push the connecting rod to slide vertically downward on the outer surface of the slide rod in the frame, thereby causing the connecting rod to drive the bending plate fixed on the lower surface and the connecting arm slidably installed between the U-shaped cylinder to move downward together, and the connecting arm can drive the upper die for drawing and bending the back panel of the refrigerator fixed on the lower surface to press downward until the upper die for drawing and bending the back panel of the refrigerator is pushed down by the first hydraulic rod to reach the corresponding distance between it and the lower die for drawing and bending the back panel of the refrigerator. Stop, then you can start the second hydraulic rod to push the connecting arm down in the U-shaped cylinder while pressing on one end of the spring, so that the connecting arm can drive the upper die of the draw-bending forming of the refrigerator back panel fixed on the lower surface to press on the upper surface of the plate placed on the surface of the draw-bending forming lower die of the refrigerator back panel, and then the plate can be stretched in the mold by applying pressure to form a preliminary shape, then you can make the second hydraulic rod pull back the piston rod, and the connecting arm will be pulled up a distance by the tension of the spring, and then you can start the first hydraulic rod again The rod continues to move downward, driving the bending plate to squeeze and bend the plates protruding from both sides of the lower die of the drawing and bending forming of the back panel of the refrigerator into a U shape, and in the process of the bending plate continuing to move downward, it will also drive the upper die of the drawing and bending forming of the back panel of the refrigerator to press on the upper surface of the plate again and keep it in place. As the bending plate continues to move downward, the connecting frame can drive the U-shaped tube to slide on the outer surface of the connecting arm and press on one end of the spring, and in the process of continuous downward movement, it will drive the connecting arm to gradually increase the pressure on the spring, so that the connecting arm can be driven by the elastic force exerted by the spring. The upper die for drawing and bending the refrigerator back panel gradually increases the elastic force applied to the plate. This staged pressure prevents the plate from being subjected to sudden and excessive impact during drawing and bending, reducing deformation or cracking caused by uneven force on the plate, thereby improving the quality and stability of the molded parts. It also ensures that the plate is always clamped and pressed throughout the entire drawing and bending process. Whether in the drawing stage or the bending stage, the plate will not be displaced due to excessive impact or vibration during processing, thereby ensuring processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only examples of the embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 2 This is a structural diagram of the bending mechanism in an embodiment of the present utility model;

[0019] Figure 3 This is a structural diagram of the lower die for drawing and bending the bending plate and the refrigerator back panel in an embodiment of the present utility model;

[0020] Figure 4 This is a structural schematic diagram of the connecting arm and the upper die for drawing and bending the back panel of the refrigerator in an embodiment of the present utility model;

[0021] Figure 5 It is a structural schematic diagram of the drawing mechanism in an embodiment of the present utility model.

[0022] Drawing reference numerals: 1. Frame; 101. Sliding rod; 102. Connecting rod; 103. Lower die for drawing and bending the back panel of refrigerator; 2. Bending mechanism; 201. First hydraulic rod; 202. Connecting frame; 203. U-shaped cylinder; 204. Bending plate; 3. Drawing mechanism; 301. Connecting plate; 302. Second hydraulic rod; 303. Connecting arm; 304. Upper die for drawing and bending the back panel of refrigerator; 305. Spring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, the following is a further detailed description of the present invention in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the embodiments of the present invention.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0026] See also Figure 1-Figure 2As shown, an embodiment of the utility model is a drawing and bending forming mold for the back panel of a refrigerator, comprising a frame 1, a sliding rod 101 is fixedly installed inside the frame 1, a connecting rod 102 is slidably installed on the outer surface of the sliding rod 101, a bending mechanism 2 is fixedly installed on the outer surface of the connecting rod 102, a drawing mechanism 3 is fixedly installed between the bending mechanisms 2, the drawing mechanism 3 can be driven by the bending mechanism 2 to move downward together and fit with the upper surface of the drawing and bending forming lower mold 103 for the back panel of the refrigerator, and the drawing and bending forming lower mold 103 for the back panel of the refrigerator is fixedly installed on the lower surface of the frame 1.

[0027] When the draw-bending operation is performed on the back panel of the refrigerator, the plate can be slid from one end of the frame 1 into the upper surface of the draw-bending and forming lower die 103 of the refrigerator back panel, and then the bending mechanism 2 can be started to drive the drawing mechanism 3 on the outer surface of the connecting rod 102 to move vertically downward until the drawing mechanism 3 is moved to the corresponding distance between the drawing mechanism 3 and the draw-bending and forming lower die 103 of the refrigerator back panel. After that, the bending mechanism 2 will stop moving downward and the drawing mechanism 3 will be started at the same time, and the drawing mechanism 3 will be pushed and pressed against the upper surface of the plate placed on the surface of the draw-bending and forming lower die 103 of the refrigerator back panel, and then the plate can be stretched in the mold by applying pressure to form a preliminary shape, and then the drawing mechanism 3 can be pulled back, and the pushing end of the drawing mechanism 3 is reset. The rear pressing end is in a floating state and is pressed against the upper surface of the plate by elastic force, thereby applying a clamping force to the stretched plate. Subsequently, the bending mechanism 2 can be started again to continue to move downward to extrude and bend the plate protruding from both sides of the lower die 103 of the drawing and bending forming of the back panel of the refrigerator into a U-shape. In the process of the bending mechanism 2 continuing to move downward, the pressing end of the drawing mechanism 3 will be driven to automatically move upward and the elastic force applied to the plate will be gradually increased, thereby realizing the linkage between bending and drawing, without the need for separate operation, so that the bending mechanism 2 and the drawing mechanism 3 can complete these two process steps continuously, reducing the multiple movements and repositioning of the workpiece between different molds, greatly improving production efficiency, saving time, reducing labor intensity, and making the production process smoother.

[0028] See also Figure 3-Figure 4 As shown, the bending mechanism 2 includes a connecting frame 202, which is fixedly mounted on the outer surface of the connecting rod 102, a first hydraulic rod 201 is fixedly mounted on the upper surface of the connecting frame 202, a piston rod of the first hydraulic rod 201 is fixedly mounted on the inner upper surface of the frame 1, and a bending plate 204 is fixedly mounted on the lower surface of the connecting frame 202.

[0029] The bending plates 204 are located on both sides of the drawing and bending forming lower die 103 of the refrigerator back panel, and can be pushed by the first hydraulic rod 201 to squeeze and bend the plates protruding from both sides of the drawing and bending forming lower die 103 of the refrigerator back panel.

[0030] See also Figure 5As shown, the drawing mechanism 3 includes a connecting plate 301, which is fixedly installed between the two groups of connecting frames 202. A second hydraulic rod 302 is fixedly installed on the lower surface of the connecting plate 301. The piston rod of the second hydraulic rod 302 is flush with the upper die 304 for drawing and bending the back panel of the refrigerator. A connecting arm 303 is fixedly installed on the upper surface of the upper die 304 for drawing and bending the back panel of the refrigerator. Both ends of the connecting arm 303 are slidably installed in the two groups of U-shaped cylinders 203, and the U-shaped cylinder 203 is fixedly installed at one end of the connecting frame 202.

[0031] The lower surface of the upper mold 304 for drawing and bending the back panel of the refrigerator is provided with a protrusion, and the upper surface of the lower mold 103 for drawing and bending the back panel of the refrigerator is provided with a groove. The protrusion of the upper mold 304 for drawing and bending the back panel of the refrigerator can be pressed into the groove of the lower mold 103 for drawing and bending the back panel of the refrigerator, so that the material between them can be stretched in the mold to form a preliminary shape.

[0032] A spring 305 is fixedly connected to the inner upper surface of the U-shaped cylinder 203, and the lower surface of the spring 305 is fixedly connected to the upper surface of the connecting arm 303, so that the connecting arm 303 can drive the upper mold 304 of the refrigerator back panel drawing and bending forming through the elastic force applied by the spring 305 to press the plate placed on the surface of the lower mold 103 of the refrigerator back panel drawing and bending forming.

[0033] When in use, after placing the plate on the upper surface of the lower mold 103 for drawing and bending the back panel of the refrigerator, the first hydraulic rod 201 can be started to push the connecting rod 102 to slide vertically downward on the outer surface of the slide rod 101 in the frame 1, thereby enabling the connecting rod 102 to drive the bending plate 204 fixedly installed on the lower surface and the connecting arm 303 slidably installed between the U-shaped cylinder 203 to move downward together, and the connecting arm 303 can drive the upper mold 304 for drawing and bending the back panel of the refrigerator fixedly installed on the lower surface to press downward until the upper mold 304 for drawing and bending the back panel of the refrigerator is pushed down by the first hydraulic rod 201 to be aligned with the lower mold 10 3 can be stopped after reaching the corresponding distance between them, and then the second hydraulic rod 302 can be started to push the connecting arm 303 to move downward in the U-shaped cylinder 203 while pressing on one end of the spring 305, so that the connecting arm 303 can drive the refrigerator back panel drawing and bending forming upper die 304 fixed on the lower surface to press on the upper surface of the plate placed on the surface of the refrigerator back panel drawing and bending forming lower die 103, and then the plate can be stretched in the die by applying pressure to form a preliminary shape, and then the second hydraulic rod 302 can be pulled back to the piston rod, and the connecting arm 303 will also be pulled up a distance by the tension of the spring 305. The first hydraulic rod 201 can then be started again to move downward continuously, driving the bending plate 204 to squeeze and bend the plate protruding from both sides of the lower die 103 of the refrigerator back panel drawing and bending forming into a U shape, and in the process of the bending plate 204 continuing to move downward, it will also drive the upper die 304 of the refrigerator back panel drawing and bending forming to press on the upper surface of the plate again and keep it in place. As the bending plate 204 continues to move downward, the connecting frame 202 can drive the U-shaped cylinder 203 to slide on the outer surface of the connecting arm 303 and press on one end of the spring 305, and in the process of continuing to move downward, it will drive the connecting arm 303 to gradually increase the pressure on the spring 305 , and then the connecting arm 303 can drive the upper die 304 of the refrigerator back panel drawing and bending forming to gradually increase the elastic force applied to the plate through the elastic force applied by the spring 305. This staged pressure prevents the plate from being subjected to sudden excessive impact during drawing and bending, reducing the deformation or cracking problems caused by uneven force on the plate, thereby improving the quality and stability of the formed parts, and ensuring that the plate is always in a clamped and compressed state throughout the drawing and bending process. Whether in the drawing stage or the bending stage, the plate will not be displaced due to excessive impact or vibration during the processing, thereby ensuring the processing accuracy.

[0034] In summary, the embodiment of the utility model can perform bending and drawing of the back panel of the refrigerator simultaneously through linkage, without the need for separate operations, so that the bending mechanism 2 and the drawing mechanism 3 can continuously complete two process steps, reducing the multiple movements and repositioning of the workpiece between different molds, greatly improving production efficiency, saving production time, reducing labor intensity, and making the production process smoother.

[0035] The above shows and describes the basic principles of the present invention. The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. The above embodiments and descriptions in the specification are only to illustrate the principles of the present invention. Without departing from the scope of the present invention, any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drawing and bending mold for a refrigerator back panel, characterized by: The invention comprises a frame (1), wherein a sliding rod (101) is fixedly installed in the frame (1), a connecting rod (102) is slidably installed on the outer surface of the sliding rod (101), a bending mechanism (2) is fixedly installed on the outer surface of the connecting rod (102), a drawing mechanism (3) is fixedly installed between the bending mechanisms (2), and the drawing mechanism (3) can be driven by the bending mechanism (2) to move downward together and fit with the upper surface of the drawing and bending forming lower die (103) of the refrigerator back panel, and the drawing and bending forming lower die (103) of the refrigerator back panel is fixedly installed on the inner lower surface of the frame (1).

2. The drawing and bending mold for the refrigerator back panel according to claim 1, characterized in that: The bending mechanism (2) comprises a connecting frame (202), the connecting frame (202) being fixedly mounted on the outer surface of the connecting rod (102), a first hydraulic rod (201) being fixedly mounted on the upper surface of the connecting frame (202), a piston rod of the first hydraulic rod (201) being fixedly mounted on the inner upper surface of the frame (1), and a bending plate (204) being fixedly mounted on the lower surface of the connecting frame (202).

3. The drawing and bending mold for the refrigerator back panel according to claim 2, characterized in that: The bending plates (204) are located on both sides of the lower die (103) for drawing and bending the back panel of the refrigerator, and can be pushed by the first hydraulic rod (201) to squeeze and bend the plates protruding from both sides of the lower die (103) for drawing and bending the back panel of the refrigerator.

4. The drawing and bending mold for the refrigerator back panel according to claim 1, characterized in that: The drawing mechanism (3) comprises a connecting plate (301), the connecting plate (301) being fixedly mounted between two groups of connecting frames (202), a second hydraulic rod (302) being fixedly mounted on the lower surface of the connecting plate (301), a piston rod of the second hydraulic rod (302) being flush with an upper die (304) for drawing and bending the refrigerator back panel, a connecting arm (303) being fixedly mounted on the upper surface of the upper die (304) for drawing and bending the refrigerator back panel, two ends of the connecting arm (303) being slidably mounted in two groups of U-shaped cylinders (203), and the U-shaped cylinder (203) being fixedly mounted on one end of the connecting frame (202).

5. The drawing and bending mold for the refrigerator back panel according to claim 4, characterized in that: The lower surface of the upper die (304) for drawing and bending the refrigerator back panel is provided with a protrusion, and the upper surface of the lower die (103) for drawing and bending the refrigerator back panel is provided with a groove. The protrusion of the upper die (304) for drawing and bending the refrigerator back panel can be pressed into the groove of the lower die (103) for drawing and bending the refrigerator back panel, so that the material between them can be stretched in the die to form a preliminary shape.

6. The drawing and bending mold for the refrigerator back panel according to claim 5, characterized in that: A spring (305) is fixedly connected to the inner upper surface of the U-shaped cylinder (203), and the lower surface of the spring (305) is fixedly connected to the upper surface of the connecting arm (303), so that the connecting arm (303) can drive the upper die (304) for drawing and bending the refrigerator back panel to press the plate placed on the surface of the lower die (103) for drawing and bending the refrigerator back panel through the elastic force applied by the spring (305).

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