Automatic production line equipment for refrigerator back plate

Abstract

The invention discloses automatic production line equipment for refrigerator back plates, and relates to the technical field of refrigerator back plate production. The device comprises a rack, the inner top of the rack is provided with a blanking head and a bending punch, the blanking head and the bending punch are both driven by a hydraulic cylinder, the outer side of the bending punch is sleeved with the blanking head, four sets of blanking rods are arranged at the bottom of the blanking head, the rack is internally provided with a blanking die and a bending frame, the bending frame is located below the blanking die, and the blanking die and the bending frame are connected through a hydraulic cylinder. An inner supporting plate capable of ascending and descending is arranged in the machine frame and can penetrate through the blanking die and the bending frame. The blanking die and the bending frame are arranged up and down, blanking, deburring and bending can be achieved in the same equipment, the equipment is small in occupied area and high in production efficiency, the long side rods and the short side rods swing to the vertical state, deburring treatment can be conducted on cut openings in the four corners of a back plate, the long side rods and the short side rods swing to the horizontal state, and therefore the back plate can be bent. And the back plate can be bent, and the manufacturing cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerator backboard production, and in particular to automatic production line equipment for refrigerator backboards. Background Art

[0002] With the development of the modern home appliance industry, especially the increasing production demand for home appliances such as freezers and refrigerators, higher requirements are placed on the automation and efficiency of the production line. In the production process of freezers, the backboard, as an important part of the freezer, not only plays a structural support role, but is also directly related to the appearance and functionality of the freezer. Therefore, the production accuracy, processing efficiency and product quality of the backboard have become one of the key factors in the production process of freezers.

[0003] In the production process, the back panel of the refrigerator needs to be punched at the four corners first, and then bent. In the Chinese patent (publication number: CN114603041B), an automatic production line equipment for the back panel of the refrigerator is disclosed, including: a loading device, a punching device, a right-angle bending device, and a unloading device. This patent and the existing equipment are both distributed in a combination of multiple groups of equipment. The punching device and the right-angle bending device are in different stations. At the same time, during the back panel cutting process, burrs are easily left on the edge of the metal plate, which not only affects the appearance, but may also have adverse effects in subsequent bending, spraying and other links, resulting in uneven coating or poor back panel assembly. A deburring station is often required, which is not only costly, but also occupies a large area of ​​equipment. The cut back panel needs to be repositioned at the right-angle bend, and the production efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and provide an automatic production line equipment for refrigerator back panels.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: An automatic production line equipment for refrigerator backboards, comprising a frame, a punching head and a bending punch are arranged on the inner top of the frame, the punching head and the bending punch are driven by a hydraulic cylinder, and the punching head is sleeved on the outer side of the bending punch, and four groups of punching rods are arranged at the bottom of the punching head, a punching die and a bending frame are installed inside the frame, the bending frame is located below the punching die, and a lifting inner support plate is arranged inside the frame, and the inner support plate can pass through the punching die and the bending frame; The four sides of the bottom of the punching die are slidably connected with side support plates, the four corners of the top of the bending frame are rotatably installed with swing heads, the tops of the four groups of swing heads are respectively slidably connected with two groups of long side rods and two groups of short side rods, the two groups of long side rods are diagonally distributed, the width and length of the long side rods are smaller than the punching rods, the cross-section of the short side rods is the same as that of the long side rods, and the outer surfaces of the upper parts of the long side rods and the short side rods are both provided with frosted surfaces.

[0006] Furthermore, positioning guide plates are installed around the inner wall of the punching die.

[0007] Furthermore, supporting sleeves are provided around the bottom of the punching die, and the side support plate is slidably connected in the supporting sleeves. Mounting plates are fixedly installed around the outer wall of the punching die, and a telescopic cylinder is fixedly installed on the outer side of the mounting plate, and the telescopic end of the telescopic cylinder is fixedly connected to the side support plate.

[0008] Furthermore, four groups of guide sleeves are fixedly installed on the inner bottom of the frame, and a sliding rod is slidably connected inside the guide sleeve, and the sliding rod is fixedly connected to the bottom of the inner support plate. A supporting spring is arranged between the bottom of the sliding rod and the inner bottom of the guide sleeve, and a limiting cylinder is fixedly installed on the outer side of the guide sleeve, and two groups of limiting holes are opened through the sliding rod, and the limiting cylinder can be inserted into the limiting holes.

[0009] Furthermore, a suction hole is provided on the top of the inner support plate.

[0010] Furthermore, a driven sprocket is fixedly connected at the rotation center of the swing head, a transmission shaft is rotatably installed inside the bending frame, a driving sprocket is fixedly installed at one end of the transmission shaft, the driving sprocket is connected to the driven sprocket through a chain, a transmission worm gear is fixedly installed in the middle of the transmission shaft, a long rod driving shaft and a short rod driving shaft are rotatably installed inside the bending frame, two sets of worm parts are arranged on the long rod driving shaft and the short rod driving shaft, the worm part on the long rod driving shaft is meshed with the transmission worm gear corresponding to the long side rod, the worm part on the short rod driving shaft is meshed with the transmission worm gear corresponding to the short side rod, and the long rod driving shaft and the short rod driving shaft are both driven by a motor.

[0011] Furthermore, a slide groove is provided at the top of the swing head, and sliders are provided at the bottom of the long side rod and the short side rod. The sliders are slidably connected in the slide groove, and a top spring is provided between the slider and the inner wall of the slide groove. Correction stops are fixedly installed on the four sides of the bending frame, and the correction stops can contact the corresponding long side rod and short side rod.

[0012] Furthermore, the correction stopper is designed to be an arc in shape as a whole, the center of the arc coincides with the rotation center of the swing head, and the correction stopper is composed of a vertical part, a correction part and a bending part from top to bottom.

[0013] Furthermore, the bending punch is designed as a quadrangular pyramid.

[0014] The beneficial effects of the present invention are as follows: The present invention arranges a punching die and a bending frame up and down, an inner support plate and a side support plate support the back plate, a punching hole is formed between adjacent side support plates, and a bending punch clamps the upper surface of the back plate, and then the punching head is inserted into the punching hole through four groups of punching rods to punch the four corners of the back plate. After the punching is completed, the bending punch presses the back plate down to the position of the long side rod and the short side rod, and the long side rod and the short side rod swing back and forth to remove burrs from the four corners, and finally the back plate is pressed into the bending frame to be bent on the four sides. Punching, deburring and bending can be achieved in the same device, the equipment occupies a small area and has high production efficiency.

[0015] The invention can deburr the four corners of the back panel by swinging the long side rod and the short side rod to a vertical state, and can bend the back panel when the long side rod and the short side rod are swung to a horizontal state. No additional deburring equipment is required, and the manufacturing cost is low.

[0016] The invention uses a bending punch to punch and bend the back plate. After bending, the long side rods and the short side rods swing upward, and the bending position can be bent twice, with high bending accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an exploded view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the punching head and the bending punch of the present invention; Figure 4 Schematic diagram of the four corners of the back plate of the refrigerator of the present invention being punched out; Figure 5 Schematic diagram of deburring the four corners of the back plate of the refrigerator of the present invention; Figure 6 Schematic diagram of the bending of the back plate of the refrigerator of the present invention; Figure 7 It is an exploded view of the blanking die of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the guide sleeve of the present invention; Fig. 9 It is a schematic diagram of the bending frame structure of the present invention; Fig.10 It is an exploded view of the bending frame structure of the present invention; Fig.11 It is a schematic diagram of the structure of the swing head and the long side rod of the present invention; Fig.12 It is a schematic diagram of the correction stopper of the present invention.

[0018] Attached figures: 1. frame; 2. punching head; 3. bending punch; 4. punching die; 41. positioning guide plate; 42. supporting sleeve; 43. mounting plate; 44. telescopic cylinder; 45. side support plate; 5. inner support plate; 51. adsorption hole; 6. bending frame; 61. swing head; 62. long side rod; 63. short side rod; 64. top spring; 65. slider; 66. driven sprocket; 67. transmission shaft; 68. driving sprocket; 69. transmission worm gear; 610. long rod drive shaft; 611. short rod drive shaft; 7. guide sleeve; 71. slide rod; 72. supporting spring; 73. limit cylinder; 74. limit socket; 8. correction stopper; 81. vertical part; 82. correction part; 83. bending part. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] Embodiment 1, as Figure 1-Figure 12 As shown, an automatic production line equipment for refrigerator backboards includes a frame 1, a punching head 2 and a bending punch 3 are arranged on the inner top of the frame 1, the punching head 2 and the bending punch 3 are driven by a hydraulic cylinder, and the punching head 2 is sleeved on the outer side of the bending punch 3, and four groups of punching rods are arranged at the bottom of the punching head 2, a punching die 4 and a bending frame 6 are installed inside the frame 1, and the bending frame 6 is located below the punching die 4, and a lifting inner support plate 5 is arranged inside the frame 1, and the inner support plate 5 can pass through the punching die 4 and the bending frame 6; The four sides of the bottom of the punching die 4 are slidably connected with side support plates 45, and the four corners of the top of the bending frame 6 are rotatably installed with swing heads 61. The tops of the four groups of swing heads 61 are respectively slidably connected with two groups of long side rods 62 and two groups of short side rods 63. The two groups of long side rods 62 are diagonally distributed, and the width and length of the long side rods 62 are smaller than the punching rods. The cross-section of the short side rods 63 is the same as that of the long side rods 62, and the outer surfaces of the upper parts of the long side rods 62 and the short side rods 63 are both provided with frosted surfaces.

[0021] Four-corner punching: The robot places the back plate in the punching die 4. At this time, the inner support plate 5 and the four groups of side support plates 45 serve as the supporting bottom plates of the punching die 4, and punching holes are formed between the adjacent side support plates 45 and the inner wall of the punching die 4. Then the hydraulic cylinder drives the bending punch 3 to press on the back plate to clamp the back plate. Then another group of hydraulic cylinders drives the punching head 2 to descend, and the punching head 2 drives the four groups of punching rods to descend. The four groups of punching rods are simultaneously inserted into the four groups of punching holes for four-corner punching. After the punching is completed, the punching head 2 is reset, and the side support plate 45 is away from the inner support plate 5, so that the back plate can pass through the punching die 4.

[0022] Deburring: The inner support plate 5 and the bending punch 3 clamp the back plate and descend, so that the punching opening descends to the position of the short side rod 63. Since the width and length of the long side rod 62 are smaller than the punching rod, there is a certain distance between the long side rod 62 and the short side rod 63 and the punching opening. At this time, the swing head 61 drives the long side rod 62 and the short side rod 63 to swing back and forth in a small amplitude, and the long side rod 62 and the short side rod 63 slide back and forth in a small amplitude relative to the swing head 61, and the frosted surface can just perform deburring and grinding on the two punching edges of the punching opening.

[0023] Bending: After deburring is completed, the inner support plate 5 and the bending punch 3 clamp the back plate and rise first. When the back plate exceeds the long side rod 62, the swing head 61 drives the long side rod 62 and the short side rod 63 to swing to a horizontal state. At this time, the long side rod 62 and the short side rod 63 form a blanking frame. Then the inner support plate 5 and the bending punch 3 clamp the back plate and descend. When the bending punch 3 is inserted into the blanking frame, the four sides of the back plate are preliminarily bent at the same time. Then the swing head 61 is controlled to swing. The swing head 61 drives the long side rod 62 and the short side rod 63 to swing upward, and the long side rod 62 and the short side rod 63 slide relative to the swing head 61, and the long side rod 62 and the short side rod 63 slide toward the inside of the blanking frame to perform a secondary bending on the back plate. The bending effect is good. After the bending is completed, the bending punch 3 is reset and the robot unloads the material.

[0024] Therefore, the equipment of the present invention can realize punching, deburring and bending at the same time, the equipment occupies a small area, has a low manufacturing cost, saves the transportation time of different workstations, and has high production efficiency.

[0025] Embodiment 2, based on the above embodiment, further includes that positioning guide plates 41 are installed around the inner wall of the punching die 4. Through this design, the back plate can be automatically guided to the middle position of the punching die 4, and the punching accuracy is high.

[0026] Embodiment three, on the basis of the above embodiment, further includes: support sleeves 42 are provided around the bottom of the punching die 4, the side support plate 45 is slidably connected in the support sleeves 42, and mounting plates 43 are fixedly installed around the outer wall of the punching die 4, and a telescopic cylinder 44 is fixedly installed on the outer side of the mounting plate 43, and the telescopic end of the telescopic cylinder 44 is fixedly connected to the side support plate 45.

[0027] By controlling the operation of the telescopic cylinder 44, the telescopic cylinder 44 drives the side support plate 45 away from the inner support plate 5, so that the back plate can pass through the punching die 4. During punching, the supporting sleeve 42 can support the side support plate 45 to ensure that the side support plate 45 is stable in load bearing.

[0028] Embodiment 4, on the basis of the above embodiment, further includes: four groups of guide sleeves 7 are fixedly installed on the inner bottom of the frame 1, and the guide sleeves 7 are internally slidably connected with a slide rod 71, the slide rod 71 is fixedly connected to the bottom of the inner support plate 5, and a support spring 72 is arranged between the bottom of the slide rod 71 and the inner bottom of the guide sleeve 7, and a limit cylinder 73 is fixedly installed on the outer side of the guide sleeve 7, and two groups of limit holes 74 are opened through the slide rod 71, and the limit cylinder 73 can be inserted into the limit hole 74.

[0029] Through the arrangement of this embodiment, under the action of the supporting spring 72, it is only necessary to control the lifting and lowering of the bending punch 3 to make the inner support plate 5 and the bending punch 3 clamping the back plate to lift and lower. The control is simple, and during punching, the telescopic end of the limit cylinder 73 is inserted into the lower limit hole 74, and during deburring, the limit cylinder 73 is inserted into the upper limit hole 74, to ensure that the inner support plate 5 is stably supported and the back plate is stably clamped, to ensure that the back plate will not be displaced during punching and deburring.

[0030] Embodiment 5, based on the above embodiment, further includes that a suction hole 51 is opened on the top of the inner support plate 5, and the setting of the suction hole 51 can further improve the clamping force of the back plate.

[0031] Embodiment 6, on the basis of the above embodiment, further includes: a driven sprocket 66 is fixedly connected at the rotation center of the swing head 61, a transmission shaft 67 is rotatably installed inside the bending frame 6, a driving sprocket 68 is fixedly installed at one end of the transmission shaft 67, the driving sprocket 68 is transmission-connected to the driven sprocket 66 through a chain, a transmission worm gear 69 is fixedly installed in the middle of the transmission shaft 67, a long rod drive shaft 610 and a short rod drive shaft 611 are rotatably installed inside the bending frame 6, two groups of worm parts are arranged on the long rod drive shaft 610 and the short rod drive shaft 611, the worm part on the long rod drive shaft 610 is meshed with the transmission worm gear 69 corresponding to the long side rod 62, the worm part on the short rod drive shaft 611 is meshed with the transmission worm gear 69 corresponding to the short side rod 63, and the long rod drive shaft 610 and the short rod drive shaft 611 are both driven by motors.

[0032] Furthermore, a slide groove is provided at the top of the swing head 61, and sliders 65 are provided at the bottom of the long side rod 62 and the short side rod 63. The slider 65 is slidably connected in the slide groove, and a top spring 64 is provided between the slider 65 and the inner wall of the slide groove. Correction stops 8 are fixedly installed on the four sides of the bending frame 6, and the correction stops 8 can contact the corresponding long side rod 62 and short side rod 63.

[0033] Furthermore, the correction stopper 8 is designed to be an arc in shape as a whole, the center of the arc coincides with the rotation center of the swing head 61, and the correction stopper 8 is composed of a vertical portion 81, a correction portion 82 and a bending portion 83 from top to bottom.

[0034] Deburring: The inner support plate 5 and the bending punch 3 clamp the back plate and descend, so that the blanking opening descends to the position of the short side rod 63. Since the width and length of the long side rod 62 are smaller than the blanking rod, there is a certain distance between the long side rod 62 and the short side rod 63 and the blanking opening. At this time, the long rod driving shaft 610 and the short rod driving shaft 611 are controlled by the motor to rotate forward and reverse. The long rod driving shaft 610 drives the two sets of transmission worm gears 69 to rotate through the worm part, and the two sets of transmission worm gears 69 drive the two sets of transmission shafts 67 to rotate. The two sets of transmission shafts 67 drive the swing heads 61 under the two sets of long side rods 62 to swing synchronously in the opposite direction through the active sprocket 68 and the driven sprocket 66, and both swing toward the back plate direction, and at the same time The two groups of short side rods 63 also swing synchronously toward the back plate, and the long side rods 62 and the short side rods 63 swing back and forth with a small amplitude, and the punched edges parallel to the rotation axes of the long side rods 62 and the short side rods 63 are deburred. In the process of reciprocating swinging, the long side rods 62 and the short side rods 63 will repeatedly contact the vertical part 81 and the correction part 82. When contacting the correction part 82, the correction part 82 will squeeze the long side rods 62 and the short side rods 63 toward the back plate. At this time, the wear surface can contact with the other punched edge for deburring. Therefore, through the setting of this embodiment, it is only necessary to control the reciprocating swing of the swing head 61 to achieve deburring of the two punched edges at the same time, with a simple structure and high deburring efficiency.

[0035] Bending: After deburring is completed, the inner support plate 5 and the bending punch 3 clamp the back plate and rise first. When the back plate exceeds the long side rod 62, the swing head 61 drives the long side rod 62 and the short side rod 63 to swing to a horizontal state. Since there is a certain distance between the long side rod 62 and the short side rod 63 and the blanking opening, the distance between the long side rod 62 and the short side rod 63 that swing to a horizontal state and the edge of the bending punch 3 is too large, so the long side rod 62 and the short side rod 63 need to move inward a short distance to ensure that the distance between the long side rod 62 and the short side rod 63 and the edge of the bending punch 3 meets the bending spacing. Therefore, when the long side rod 62 and the short side rod 63 swing to a horizontal state, the long side rod 62 and the short side rod 63 move from the vertical portion 81 to the bending portion. 83, the bending portion 83 will push the long side rod 62 and the short side rod 63 inward, at this time the long side rod 62 and the short side rod 63 form a blanking frame, and then the inner support plate 5 and the bending punch 3 clamp the back plate to descend, when the bending punch 3 is inserted into the blanking frame, the four sides of the back plate are preliminarily bent at the same time, and then the swing head 61 is controlled to swing, the swing head 61 drives the long side rod 62 and the short side rod 63 to swing upward, when the long side rod 62 and the short side rod 63 move from the bending portion 83 to the correcting portion 82, the correcting portion 82 will push the long side rod 62 and the short side rod 63 to continue to move inward, at this time the long side rod 62 and the short side rod 63 will push the first bent part inward again to bend, and the back plate is bent for the second time, and the bending effect is good.

[0036] Embodiment 7, based on the above embodiment, further includes that the bending punch 3 is designed as a quadrangular pyramid, through which there is enough space for the secondary bending of the back plate and the bending accuracy is high.

[0037] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic production line equipment for refrigerator back panels, comprising a frame (1), characterized in that: The inner top of the frame (1) is provided with a punching head (2) and a bending punch (3), both of which are driven by hydraulic cylinders, and the punching head (2) is sleeved on the outside of the bending punch (3), and the bottom of the punching head (2) is provided with four sets of punching rods, and the frame (1) is provided with a punching die (4) and a bending frame (6), and the bending frame (6) is located below the punching die (4), and the frame (1) is provided with a lifting inner support plate (5), and the inner support plate (5) can pass through the punching die (4) and the bending frame (6); The four sides of the bottom of the punching die (4) are slidably connected to side support plates (45), the four corners of the top of the bending frame (6) are rotatably mounted with swing heads (61), the tops of the four groups of swing heads (61) are respectively slidably connected to two groups of long side rods (62) and two groups of short side rods (63), the two groups of long side rods (62) are diagonally distributed, the width and length of the long side rods (62) are both smaller than the punching rods, the cross section of the short side rods (63) is the same as that of the long side rods (62), and the outer surfaces of the upper parts of the long side rods (62) and the short side rods (63) are both provided with frosted surfaces.

2. The automatic production line equipment for refrigerator back panels according to claim 1 is characterized in that: Positioning guide plates (41) are installed around the inner wall of the punching die (4).

3. The automatic production line equipment for refrigerator back panels according to claim 2 is characterized in that: Support sleeves (42) are provided around the bottom of the punching die (4), and the side support plate (45) is slidably connected to the support sleeves (42). Mounting plates (43) are fixedly installed around the outer wall of the punching die (4), and a telescopic cylinder (44) is fixedly installed on the outer side of the mounting plate (43). The telescopic end of the telescopic cylinder (44) is fixedly connected to the side support plate (45).

4. The automatic production line equipment for refrigerator back panels according to claim 1, characterized in that: Four groups of guide sleeves (7) are fixedly mounted on the inner bottom of the frame (1); a slide rod (71) is slidably connected inside the guide sleeve (7); the slide rod (71) is fixedly connected to the bottom of the inner support plate (5); a support spring (72) is arranged between the bottom of the slide rod (71) and the inner bottom of the guide sleeve (7); a limit cylinder (73) is fixedly mounted on the outer side of the guide sleeve (7); two groups of limit holes (74) are penetrated through the slide rod (71); the limit cylinder (73) can be plugged into the limit hole (74).

5. The automatic production line equipment for refrigerator back panels according to claim 4, characterized in that: A suction hole (51) is provided on the top of the inner support plate (5).

6. The automatic production line equipment for refrigerator back panels according to claim 1, characterized in that: A driven sprocket (66) is fixedly connected to the rotation center of the swing head (61), a transmission shaft (67) is rotatably mounted inside the bending frame (6), a driving sprocket (68) is fixedly mounted on one end of the transmission shaft (67), the driving sprocket (68) is transmission-connected to the driven sprocket (66) via a chain, a transmission worm gear (69) is fixedly mounted in the middle of the transmission shaft (67), and a long rod drive shaft (69) is rotatably mounted inside the bending frame (6). 10) and the short rod drive shaft (611), and two sets of worm gear parts are arranged on the long rod drive shaft (610) and the short rod drive shaft (611), the worm gear part on the long rod drive shaft (610) is meshed with the transmission worm wheel (69) corresponding to the long side rod (62), and the worm gear part on the short rod drive shaft (611) is meshed with the transmission worm wheel (69) corresponding to the short side rod (63), and the long rod drive shaft (610) and the short rod drive shaft (611) are both driven by a motor.

7. The automatic production line equipment for refrigerator back panels according to claim 6, characterized in that: A slide groove is provided at the top of the swing head (61), and a slider (65) is provided at the bottom of each of the long side rod (62) and the short side rod (63). The slider (65) is slidably connected in the slide groove, and a top spring (64) is provided between the slider (65) and the inner wall of the slide groove. Correction stoppers (8) are fixedly installed on the four sides of the bending frame (6), and the correction stoppers (8) can contact the corresponding long side rod (62) and the short side rod (63).

8. The automatic production line equipment for refrigerator back panels according to claim 7, characterized in that: The correction stopper (8) is designed as an arc as a whole, the center of the arc coincides with the rotation center of the swing head (61), and the correction stopper (8) is composed of a vertical portion (81), a correction portion (82) and a bending portion (83) from top to bottom.

9. The automatic production line equipment for refrigerator back panels according to any one of claims 1 to 8, characterized in that: The bending punch (3) is designed as a quadrangular pyramid.

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