Automatic bending device for steel door frame
By designing an automatic bending device, the steel door frame is bent efficiently and precisely using a hydraulic and adjusting mechanism, solving the problems of low efficiency and poor precision in existing technologies and ensuring high-quality forming of the door frame.
Patent Information
- Application Number
- CN202511291810.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2025-11-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing door frame bending devices suffer from low processing efficiency and poor precision, mainly due to repeated adjustments and misalignments caused by manual hand operation.
Design an automatic bending device for steel door frames, including a frame, a hydraulic mechanism, an upper die, a lower die, and a middle die. The device achieves one-time concave bending through an adjustment mechanism. Combined with a multi-angle, staged bending process, it ensures uniform stress distribution of the steel plate during plastic deformation and avoids local stress concentration.
This technology enables efficient and precise production of door frame bending, improves bending accuracy and rigidity, prevents folding damage, and ensures the high precision and strong rigidity of the final concave door frame.
Smart Images
Figure CN120961687A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of door frame bending, in particular to a steel door frame automatic bending device. BACKGROUND
[0002] In the field of door frame bending, the precision and efficiency of door frame bending processing directly affect product quality and production efficiency. In door frame production, the bending process generally relies on manual operation. Workers need to hold the metal plate to be bent and complete the processing through multiple operations of traditional bending equipment. This method has obvious limitations. On the one hand, the manual repeated operation process is tedious. After single bending, the plate position and angle need to be adjusted again for multiple bending. The processing efficiency is difficult to meet the large-scale production demand. On the other hand, the manual holding stability is poor. Affected by operation habit and physical strength, the plate is easy to deviate, resulting in bending angle and size deviation, reducing product qualification rate and increasing rework cost.
[0003] The existing industrial door frame bending process has the core problems of low processing efficiency (multiple manual adjustments and repeated operations take a long time) and poor bending precision (manual holding is easy to deviate, resulting in size and angle deviation). Therefore, it is urgent to innovate through automatic equipment to realize precise and efficient production of door frame bending. In view of this, the present application provides a steel door frame automatic bending device. SUMMARY
[0004] The present application aims to provide a steel door frame automatic bending device to solve the technical problems of low bending efficiency and poor precision of the door frame bending device.
[0005] To solve the above technical problems, the present application provides the following technical scheme: a steel door frame automatic bending device, comprising a rack, a middle die and two adjusting mechanisms for adjusting the form of the middle die, two hydraulic mechanisms are symmetrically arranged on the rack, an upper die is fixed on the movable end of the upper hydraulic mechanism, and a lower die is fixed on the movable end of the lower hydraulic mechanism; The middle die is located in the middle part of the gap between the upper die and the lower die. The middle die comprises two bottom die blocks and two top die blocks. Cavities are formed in the opposite ends of the two bottom die blocks. The two cavities are connected through a counter component. The upper die and the lower die are connected through sliding. The two upper dies are connected through sliding. In the initial state, the bottom die blocks and the top die blocks are in contact to form an integral whole. When the middle die is located in the lower die gap, the adjusting mechanism can drive the bottom bending body formed by the bottom die blocks and the top die blocks to move, and make the two bottom bending bodies move in opposite directions through the counter component. The adjusting mechanism can also drive the top bending body formed by the two top die blocks to move upward. The upper die, the lower die and the middle die gap can constitute a concave bending cavity. The present application can bend the concave shape at one time by setting the upper die, the lower die and the middle die to constitute a concave bending cavity, reducing manual operation, thereby improving the precision of door frame bending, realizing efficient production, and solving the technical problems of low bending efficiency and poor precision of the current door frame bending device.
[0006] Preferably, the upper die comprises a convex upper die block and a bending plate, a sliding groove is formed in the middle of the upper die block, the bending plate is slidingly arranged on the sliding groove, a plug-in slot is formed on the bending plate, the top end of the bending plate penetrates through the sliding groove and is fixedly provided with a connecting plate, the connecting plate is fixedly arranged on the movable end of the hydraulic mechanism above, the connecting plate is in contact with the top end of the upper die block, a plurality of spring grooves are linearly and equidistantly arranged on both sides of the end of the upper die block, and the spring grooves are elastically connected to the bottom end of the connecting plate through springs A.
[0007] Preferably, a sliding groove A is formed in the upper die block, a plug-in plate is slidingly arranged in the sliding groove A, the plug-in plate is in plug-in cooperation with the plug-in slot, a sliding groove B in communication with the sliding groove A is formed on one side of the bottom end of the upper die block, a vertical plate is slidingly arranged in the sliding groove B, the sliding groove B is elastically connected to the vertical plate through a plurality of springs B arranged uniformly, and a movable groove is formed on the other side of the bottom end of the upper die block.
[0008] Preferably, the lower die comprises a lower die block, the lower die block is fixedly arranged on the movable end of the hydraulic mechanism below, a placing cavity is formed on the top end of the lower die block, a die groove is formed in the middle of the placing cavity, the die groove is in plug-in cooperation with the protrusion on the bottom end of the upper die, a bending cavity is formed on the bottom end of the die groove, a triangular guide block is fixedly arranged on one side of the die groove relative to the placing cavity, and the triangular guide block is in movable cooperation with the vertical plate.
[0009] Preferably, a rotating groove is formed on the side of the die groove away from the triangular guide block, a bending rotating block is rotatably arranged in the rotating groove, a rod body is fixedly arranged on the top end of the bending rotating block, the rod body is in movable cooperation with the movable groove, a limiting rotating groove is formed in the rotating groove, a spring plate is movably arranged in the limiting rotating groove, the spring plate is fixedly connected with the bending rotating block, and the spring plate is elastically connected to the limiting rotating groove through a plurality of arc springs arranged uniformly.
[0010] Preferably, the middle die is arranged in the middle of the upper die and the lower die gap, the middle die comprises two bottom blocks and two top blocks, the opposite ends of the two bottom blocks are respectively provided with cavities, the two cavities are connected through a counter component, the top end of the bottom block is provided with a sliding groove C, the sliding groove C is slidably provided with a sliding plate X, the two top blocks are respectively arranged at the top end of the two sliding plates X, a sliding groove D is arranged on one of the top blocks, the sliding groove D is slidably connected with a sliding plate Y, the sliding plate Y is fixedly connected with the other top block, the two ends of the bottom block are fixedly provided with sliding columns, the two ends of the other top block are fixedly provided with movable sliding blocks, and a circular hole is arranged on the movable sliding block.
[0011] Preferably, the counter component comprises a central shaft and a plurality of groups of connecting rods, the top end of the central shaft is provided with a sliding groove E, each group of connecting rods comprises four connecting rods arranged in a parallelogram shape, two adjacent connecting rods are rotatably connected through vertical rods, the two vertical rods in the axial direction are slidably connected with the sliding groove E, and the two vertical rods in the radial direction are rotatably connected with the two cavities.
[0012] Preferably, the adjusting mechanism comprises a fixed seat, a connecting disc, a gear ring and a gear plate, two fixed seats are respectively fixedly arranged at the two ends of the rack, the connecting disc at the tail end is fixedly arranged on the fixed seat at the tail end, the top parts of the two connecting discs near the ends are respectively provided with horizontal sliding grooves, the eccentric ends of the horizontal sliding grooves are provided with vertical sliding grooves, the vertical sliding grooves and the horizontal sliding grooves form an L-shaped sliding cavity, the movable sliding blocks are movably connected with the sliding cavity, the bottom parts of the two connecting discs near the ends are symmetrically provided with two sliding column grooves, two connecting grooves are arranged in the gap between the two sliding column grooves, the two connecting grooves are respectively connected with the two ends of the central shaft, the sliding column grooves are movably connected with the sliding columns, the distal ends of the two connecting discs are rotatably connected with adjusting discs, the proximal ends of the two adjusting discs are respectively provided with inclined guide grooves, the eccentric ends of the inclined guide grooves are provided with arc guide grooves, the inclined guide grooves and the arc guide grooves form a guide cavity, movable blocks are movably arranged in the guide cavity, the proximal ends of the two movable blocks are rotatably provided with connecting rods, the connecting rods are movably connected with the circular holes, the two gear rings are respectively fixedly arranged on the surfaces of the two adjusting discs, and the two gear plates are respectively fixedly arranged on the two sides of the movable end of the hydraulic mechanism.
[0013] Preferably, the fixed seat at the head end is provided with a horizontal groove, a sliding groove F is arranged on the horizontal groove in communication, a sliding rod A is slidably arranged on the sliding groove F, a sliding rod B is rotatably connected with the sliding rod A, the sliding rod B is slidably matched with the sliding groove F, a horizontal rod fixedly connected with the sliding rod B is movably arranged in the horizontal groove, one end of the horizontal rod away from the sliding rod B penetrates out of the horizontal groove and is fixedly provided with a mounting seat, and the connecting disc at the head end is fixedly arranged on the mounting seat.
[0014] Preferably, an arc slot is formed on the mounting seat, an embedding slot is formed on the arc slot, and a damping pad is embedded on the embedding slot and movably connected with the adjusting disc at the head end.
[0015] The present application has the following advantages: 1. The concave bending cavity formed by the upper die, the lower die and the middle die can bend the concave door frame at one time, reduces manual operation, improves the accuracy of door frame bending, realizes efficient production, and solves the technical problems of low bending efficiency and poor accuracy of the current door frame bending device. 2. The structure design of the middle die and the two adjusting mechanisms adopts a multi-angle and staged bending process during the process, which can form uniform stress distribution in the plastic deformation process of the steel plate, avoid weakening caused by local stress concentration, improve the overall rigidity, and prevent damage such as folding and folding marks of the door frame during the bending process, further improving the bending accuracy of the bending device. 3. The structure design of the upper die and the lower die, the middle die and the lower die first bend the corner of one side of the top end of the concave door frame, and then the bending block of the lower die driven by the upper die bends the corner of the other side of the top end of the door frame. Through the cross bending of both ends of the steel plate, it is convenient to avoid the cross of both ends of the steel plate during the bending process, further reduce the folding phenomenon, and improve the bending accuracy of the door frame. 4. Through the further design of the upper die, under the elastic force of the plurality of springs A and the gravity factor of the upper die block in the initial state, the bending plate is located in the sliding groove. At this time, the plug-in slot is aligned with the plug-in plate. Under the elastic force of the plurality of springs B, the plug-in plate is plugged into the plug-in slot. When the upper die block and the bending plate are driven to rise and fall by the movable end of the hydraulic mechanism located above, the upper die block and the bending plate are lowered together to press the top end of the door frame to ensure the flatness of the top surface of the door frame, and the bending accuracy of the door frame is further improved. When the module bottom end contacts the upper die block, the plug-in plate and the plug-in slot are just separated through the triangular guide block, the bending plate is lowered by the movable end of the hydraulic mechanism located above, and the concave part of the door frame is bent. The core of the design is to realize high-quality bending through precise and coordinated mechanical action, rather than simple deformation, so that the finally formed concave door frame part not only has high precision, but also has obvious advantages in rigidity and strength compared with products without optimized process. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the structure of the rack and hydraulic mechanism of the present application; Figure 3 It is a schematic diagram of part of the structure of the present application; Figure 4Split structure schematic diagram of the profile structure of the upper die of the present application; Figure 5 Split structure schematic diagram of one of the adjusting mechanisms of the present application; Figure 6 Split structure schematic diagram of the partial structure of the adjusting mechanism of the present application; Figure 7 Schematic diagram of the motion state of the partial structure of the adjusting mechanism of the present application; Figure 8 Split structure schematic diagram of another adjusting mechanism of the present application; Figure 9 Split structure schematic diagram of the partial structure of the present application; Figure 8 Figure 10 Structure schematic diagram of the middle die of the present application; Figure 11 Split structure schematic diagram of the middle die of the present application; Figure 12 Structure schematic diagram of the counter assembly of the present application; Figure 13 First bending state schematic diagram of the present application; Figure 14 Second bending state schematic diagram of the present application; Figure 15 Third bending state schematic diagram of the present application; Figure 16 Fourth bending state schematic diagram of the present application; Figure 17 A portion structure enlarged schematic diagram of the present application; Figure 15
[0017] Explanation of the reference numerals in the drawings: 1, frame; 2, hydraulic mechanism; 3, upper die; 31, upper die block; 32, sliding groove; 33, bending plate; 34, plug-in slot; 35, connecting plate; 36, spring slot; 37, spring A; 38, sliding groove A; 39, plug-in plate; 310, sliding groove B; 311, vertical plate; 312, spring B; 313, movable slot; 4, lower die; 40, lower die block; 41, placement cavity; 42, die slot; 43, bending cavity; 44, triangular guide block; 45, rotating slot; 46, bending rotating block; 47, rod body; 48, limiting rotating slot; 49, spring plate; 410, arc spring; 5, middle die; 50, cavity; 51, bottom die block; 52, top die block; 53, counter assembly; 54, sliding groove C; 55, sliding plate X; 56, sliding groove D; 57, sliding plate Y; 58, sliding column; 59, movable sliding block; 510, round hole; 530, connecting rod; 531, center shaft; 532, sliding groove E; 533, vertical rod; 6, adjusting mechanism; 60, fixed seat; 61, connecting disc; 62, horizontal sliding groove; 63, vertical sliding groove; 64, sliding column groove; 65, adjusting disc; 66, inclined guide groove; 67, arc guide groove; 68, movable block; 69, connecting rod; 610, tooth ring; 611, tooth plate; 612, connecting groove; 001, movement path of movable sliding block in horizontal sliding groove; 002, movement path of movable sliding block in vertical sliding groove; 601, horizontal groove; 602, sliding groove F; 603, sliding rod A; 604, sliding rod B; 605, horizontal rod; 607, mounting seat; 608, arc groove; 609, embedding groove; 610, damping pad. DETAILED DESCRIPTION
[0018] As Figures 1 to 17 shown, the application relates to a steel door frame automatic bending device, which comprises a rack 1, two hydraulic mechanisms 2, an upper die 3, a lower die 4, a middle die 5 and two adjusting mechanisms 6. The two hydraulic mechanisms 2 are symmetrically arranged on the rack 1; the hydraulic mechanism 2 of the bending device is a prior art, which is not described herein.
[0019] In the embodiment of the present application, the upper die 3 comprises a convex upper die block 31, a bending plate 33, a sliding groove 32 is formed in the middle of the upper die block 31, the bending plate 33 is slidably arranged in the sliding groove 32, a plug-in groove 34 is formed in the bending plate 33, the top end of the bending plate 33 penetrates through the sliding groove 32 and is fixedly connected with a connecting plate 35, the connecting plate 35 is fixedly connected with the movable end of the hydraulic mechanism 2 located above, the connecting plate 35 is in contact with the top end of the upper die block 31, a plurality of spring grooves 36 are linearly and equidistantly formed in the two sides of the end of the upper die block 31, the spring grooves 36 are elastically connected with the bottom end of the connecting plate 35 through springs A 37, a sliding groove A 38 is formed in the upper die block 31, a plug-in plate 39 is slidably arranged in the sliding groove A 38, the plug-in plate 39 is in plug-in contact with the plug-in groove 34, a sliding groove B 310 is formed in one side of the bottom end of the upper die block 31 and is in communication with the sliding groove A 38, a vertical plate 311 is slidably arranged in the sliding groove B 310, the sliding groove B 310 is elastically connected with the vertical plate 311 through a plurality of springs B 312 arranged uniformly, and a movable groove 313 is formed in the other side of the bottom end of the upper die block 31. Through the structural design of the upper die 3, the bending plate 33 is located in the sliding groove 32 under the elastic force of the springs A 37 and the gravity of the upper die block 31 in the initial state, at this time, the plug-in groove 34 is aligned with the plug-in plate 39, the plug-in plate 39 is plugged into the plug-in groove 34 under the elastic force of the springs B 312, the upper die block 31 and the bending plate 33 jointly descend when the movable end of the hydraulic mechanism 2 located above drives the connecting plate 35 to ascend and descend, the plug-in plate 39 is separated from the plug-in groove 34, and the bending plate 33 can slide downward relative to the upper die block 31 to perform the bending action of the concave part of the door frame.
[0020] In the embodiment of the present application, the lower die 4 comprises a lower die block 40, the lower die block 40 is fixedly connected with the movable end of the hydraulic mechanism 2 located below, a placing cavity 41 is formed in the top end of the lower die block 40, a die groove 42 is formed in the middle of the placing cavity 41, the die groove 42 is in plug-in contact with the bottom end of the upper die 3, a bending cavity 43 is formed in the bottom end of the die groove 42, a triangular guide block 44 is fixedly arranged at the position of one side of the die groove 42 relative to the placing cavity 41, the triangular guide block 44 is in movable contact with the vertical plate 311, a rotating groove 45 is formed in the side of the die groove 42 away from the triangular guide block 44, a bending rotating block 46 is rotatably arranged in the rotating groove 45, a rod body 47 is fixedly arranged at the top end of the bending rotating block 46, the rod body 47 is in movable contact with the movable groove 313, a limiting rotating groove 48 is formed in the rotating groove 45, a spring plate 49 is movably arranged in the limiting rotating groove 48, the spring plate 49 is fixedly connected with the bending rotating block 46, and the spring plate 49 is elastically connected with the limiting rotating groove 48 through a plurality of arc springs 410 arranged uniformly. Figure 15 and Figure 16As shown, the plug-in plate 39 is just separated from the plug-in slot 34, at the same time, the rod body 47 is in contact with the movable slot 313, so that the bent rotating block 46 and the spring plate 49 rotate, the arc spring 410 is compressed, and the corner on the other side of the top end of the door frame is bent.
[0021] In the embodiment of the application, the middle die 5 is arranged in the middle part of the gap between the upper die 3 and the lower die 4, the middle die 5 comprises two bottom die blocks 51 and two top die blocks 52, the two bottom die blocks 51 are each provided with a cavity 50 at the proximal end, the two cavities 50 are connected by a counter component 53, the bottom die block 51 is provided with a sliding groove C 54 at the top end, the sliding groove C 54 is slidably provided with a sliding plate X 55, the two top die blocks 52 are respectively arranged at the top end of the two sliding plates X 55, one of the top die blocks 52 is provided with a sliding groove D 56 at the top end, the sliding groove D 56 is slidably connected with a sliding plate Y 57, the sliding plate Y 57 is fixedly connected with the other top die block 52, the bottom die block 51 is fixedly provided with a sliding column 58 at both ends, one of the top die blocks 52 is fixedly provided with a movable sliding block 59 at both ends, and the movable sliding block 59 is provided with a circular hole 510.
[0022] The counter component 53 comprises a central shaft 531 and a plurality of groups of connecting rods 530, the central shaft 531 is provided with a sliding groove E 532 at the top end, each group of connecting rods 530 comprises four connecting rods arranged in a parallelogram shape, adjacent two connecting rods 530 are rotatably connected through a vertical rod 533, the two vertical rods 533 in the axial direction are slidably connected with the sliding groove E 532, and the two vertical rods 533 in the radial direction are rotatably connected with the two cavities 50.
[0023] The adjusting mechanism 6 comprises a fixed seat 60, a connecting disc 61, a tooth ring 610 and a tooth plate 611, the two fixed seats 60 are respectively fixedly arranged at both ends of the rack 1, the connecting disc 61 at the tail end is fixedly arranged on the fixed seat 60 at the tail end, the two connecting discs 61 are each provided with a horizontal sliding groove 62 at the proximal top, the horizontal sliding groove 62 is provided with a vertical sliding groove 63 at the eccentric end, the vertical sliding groove 63 and the horizontal sliding groove 62 form an L-shaped sliding cavity, the movable sliding block 59 is movably connected with the sliding cavity, the two connecting discs 61 are symmetrically provided with two sliding column grooves 64 at the proximal bottom, two connecting grooves 612 are arranged in the gap between the two sliding column grooves 64, the two connecting grooves 612 are respectively connected with both ends of the central shaft 531, the sliding column groove 64 is movably connected with the sliding column 58, the two connecting discs 61 are rotatably connected with adjusting discs 65 at the distal end, the two adjusting discs 65 are each provided with an inclined guide groove 66 at the proximal end, the inclined guide groove 66 is provided with an arc guide groove 67 at the eccentric end, the inclined guide groove 66 and the arc guide groove 67 form a guide position cavity, a movable block 68 is movably connected in the guide position cavity, the two movable blocks 68 are each rotatably provided with a connecting rod 69 at the proximal end, the connecting rod 69 is movably connected with the circular hole 510, the two tooth rings 610 are respectively fixedly arranged on the surfaces of the two adjusting discs 65, the two tooth plates 611 are respectively fixedly arranged on both sides of the movable end of the hydraulic mechanism 2 above, and the tooth ring 610 is meshingly connected with the corresponding tooth plate 611.
[0024] Specific, located at the tail end of the movable slider 59 and located at the tail end of the sliding cavity sliding connection, located at the head end of the plug-in slider 511 and located at the head end of the sliding cavity activity matching; located at the tail end of the two slide column 58 respectively with the two sliding column groove 64 located at the tail end of the sliding connection, located at the head end of the two slide column 58 respectively with the two sliding column groove 64 located at the head end of the activity matching; located at the tail end of the connecting rod 69 and the round hole 510 rotation connection, located at the head end of the connecting rod 69 and located at the head end of the round hole 510 activity matching; the tail end of the center shaft 531 and the connecting groove 612 located at the tail end of the fixed connection, the head end of the center shaft 531 and the connecting groove 612 located at the head end of the plug-in matching.
[0025] In the embodiment of the application, the horizontal groove 601 is formed in the fixed seat 60 at the head end, the sliding groove F602 is communicated with the horizontal groove 601, the sliding rod A603 is slidably arranged in the sliding groove F602, the sliding rod B604 is rotatably connected to the sliding rod A603, the sliding rod B604 is slidably matched with the sliding groove F602, the horizontal rod 605 is movably matched with the sliding rod B604 and fixedly connected to the sliding rod B604, one end of the horizontal rod 605 away from the sliding rod B604 penetrates through the horizontal groove 601 and is fixedly provided with the mounting seat 607, the connecting disc 61 at the head end is fixedly arranged on the mounting seat 607, the arc groove 608 is formed in the mounting seat 607, the embedding groove 609 is formed in the arc groove 608, the damping pad 610 is embedded in the embedding groove 609, and the damping pad 610 is movably connected to the adjusting disc 65 at the head end. Figures 1 to 14 As shown in the figure, the bottom module 51 and the two top modules 52 are in contact with each other to form an integral body in the initial state, in this state, the movable end of the hydraulic mechanism 2 located below is controlled to rise by the external control mechanism, so that the lower die 4 rises until the middle die 5 is located in the bending cavity 43, so that the steel plate forms a U-shaped structure as shown in 13, the movable end of the hydraulic mechanism 2 located above is controlled to descend by the external control mechanism, so that the upper die 3 as a whole descends, and the tooth plate 611 descends, so that the two tooth rings 610 drive the two adjusting discs 65 to rotate, so that the gap position of the sliding cavity and the inclined guide groove 66 changes, so that the movable block 68 drives the movable slider 59 to move through the connecting rod 69. Figure 7001 indicates the movement path of the movable slider 59 in the horizontal slide groove 62, and 002 indicates the movement path of the movable slider 59 in the vertical slide groove 63. When the movable slider 59 slides in the horizontal slide groove 62, one of the top modules 52 slides horizontally and drives one of the bottom modules 51 to slide through the slide plate X55, causing the positions of several vertical rods 533 to change, and the parallelogram shape of several sets of connecting rods 530 to change. Several vertical rods 533 located in the axial direction slide relative to the slide groove E532. At this time, the two bottom modules 51 move synchronously in opposite directions, and the two top modules 52 also move in opposite directions. The bottom modules 51 and the top modules 52 form a bottom bending body. The bottom bending bodies at both ends bend the two corners of the bottom end of the concave door frame along the horizontal direction. When the movable slider 59 slides in the vertical slide groove 63, the two top modules 52 form a top bending body. The two top modules 52 move upward as a whole, bending one corner of the top of the concave door frame, so that the steel plate forms a shape like... Figure 14 As shown, this bending method prevents damage to the door frame from folding creases during the bending process, achieving precise and efficient bending production.
[0026] Working principle: The steel plate is placed into the placement cavity 41 of the lower module 40; The lower die 4 is raised by the external control mechanism controlling the moving end of the hydraulic mechanism 2 located below, until the middle die 5 is located in the bending cavity 43, so that the steel plate forms a U-shaped shape as shown in 13. The external control mechanism lowers the movable end of the upper hydraulic mechanism 2, causing the upper mold 3 to descend as a whole, and the toothed plate 611 to descend accordingly. This causes the two toothed rings 610 to drive the two adjusting discs 65 to rotate, making the two bottom modules 51 move synchronously in opposite directions, and the two top modules 52 also move in opposite directions. This forms a bottom bending body between the bottom modules 51 and the top modules 52. The bottom bending bodies at both ends bend the two bottom corners of the concave door frame along the horizontal direction. The two top modules 52 move upward as a whole, bending one corner of the top of the concave door frame, so that the steel plate forms a shape like... Figure 14 The shape shown; The upper mold 3 continues to descend, the movable block 68 moves into the arc guide groove 67, and the middle mold 5 remains stationary. Figure 14 As shown, the vertical plate 311 contacts the triangular guide block 44, causing the vertical plate 311 to drive the plug-in plate 39 to slide. When the bottom end of the upper module 31 contacts the top end of the upper module 31, as... Figure 15 and Figure 16 As shown, the plug plate 39 disengages from the plug slot 34. At the same time, the rod 47 contacts the movable slot 313, causing the bending block 46 and the spring plate 49 to rotate. The arc spring 410 is compressed, bending the corner on the other side of the top of the door frame. After the plug plate 39 disengages from the plug slot 34, the movable end bending plate 33 of the hydraulic mechanism 2 located above descends, bending the concave part of the door frame. After the bending is completed, the lower hydraulic mechanism 2 is controlled to move up by the external control mechanism, the upper hydraulic mechanism 2 is controlled to move down by the external control mechanism, so that the upper die 3, the lower die 4 and the middle die 5 return to the initial state, at this time, the volume of the middle die 5 is small, and the door frame is convenient to draw out; The slide bar B604 is extracted from the sliding groove F602 and rotated, so that the two slide rods 58 at the head end are respectively separated from the two slide rod grooves 64 at the head end, the connecting rod 69 at the head end is separated from the circular hole 510 at the head end, the head end of the central shaft 531 is separated from the connecting groove 612 at the head end, after the door frame is extracted, the slide bar B604 is restored to the initial position, so that the two slide rods 58 at the head end are respectively inserted into the two slide rod grooves 64 at the head end, the connecting rod 69 at the head end is inserted into the circular hole 510 at the head end, and the head end of the central shaft 531 is inserted into the connecting groove 612 at the head end.
[0027] The embodiments of the present application are disclosed, but are not limited to the embodiments, and the ordinary skilled in the art can easily understand the spirit of the present application according to the above embodiments, and make different inferences and changes, as long as they do not deviate from the spirit of the present application, which are within the protection scope of the present application.
Claims
1. An automatic bending device for a steel door frame, characterized in that, It includes a frame (1), a middle mold (5) and two adjustment mechanisms (6) for adjusting the shape of the middle mold (5). Two hydraulic mechanisms (2) are fixedly mounted on the frame (1) in a symmetrical structure. The upper hydraulic mechanism (2) is fixedly mounted with an upper mold (3) at its movable end, and the lower hydraulic mechanism (2) is fixedly mounted with a lower mold (4) at its movable end. The middle mold (5) is located in the middle of the gap between the upper mold (3) and the lower mold (4). The middle mold (5) includes two bottom modules (51) and two top modules (52). The two bottom modules (51) have cavities (50) at their opposite ends. The two cavities (50) are connected by opposing components (53). The upper mold (3) and the lower mold (4) are slidably connected. The two upper molds (3) are slidably connected. In the initial state, the bottom module (51) and the two top modules (52) are in contact with each other to form a whole. When the middle mold (5) is located in the gap of the lower mold (4), the adjustment mechanism (6) can drive the bottom bending body formed by the bottom module (51) and the top module (52) to move, and make the two bottom bending bodies move in opposite directions through the opposing component (53). The adjustment mechanism (6) can also drive the top bending body formed by the two top modules (52) to move upward. The gap between the upper mold (3), the lower mold (4) and the middle mold (5) can form a concave bending cavity.
2. The automatic bending device for steel door frames according to claim 1, characterized in that, The upper mold (3) includes a convex upper module (31) and a bending plate (33). The upper module (31) has a groove (32) in the middle. The bending plate (33) is slidably disposed on the groove (32). The bending plate (33) has an insertion groove (34). The top of the bending plate (33) extends out of the groove (32) and is fixedly provided with a connecting plate (35). The connecting plate (35) is fixedly disposed on the movable end of the hydraulic mechanism (2) located above. The connecting plate (35) is in contact with the top of the upper module (31). Both sides of the upper module (31) are provided with a number of spring grooves (36) in a linear and equidistant structure. The spring grooves (36) are elastically connected to the bottom end of the connecting plate (35) by spring A (37).
3. The automatic bending device for steel door frames according to claim 2, characterized in that, The upper module (31) has a sliding groove A (38) inside, and a plug plate (39) is slidably provided in the sliding groove A (38). The plug plate (39) is plugged into the plug groove (34). The upper module (31) has a sliding groove B (310) on one side of the bottom end that communicates with the sliding groove A (38). A vertical plate (311) is slidably provided in the sliding groove B (310). The sliding groove B (310) and the vertical plate (311) are elastically connected by several springs B (312) evenly arranged. The upper module (31) has a movable groove (313) on the other side of the bottom end.
4. The automatic bending device for steel door frames according to claim 3, characterized in that, The lower mold (4) includes a lower module (40), which is fixed to the movable end of the hydraulic mechanism (2) located below. The lower module (40) has a placement cavity (41) at the top and a mold groove (42) in the middle of the placement cavity (41). The mold groove (42) is inserted into the bottom protrusion of the upper mold (3). The bottom of the mold groove (42) has a bending cavity (43). A triangular guide block (44) is fixed on one side of the placement cavity (41) opposite to the mold groove (42). The triangular guide block (44) is movablely engaged with the vertical plate (311).
5. The automatic bending device for steel door frames according to claim 4, characterized in that, A rotating groove (45) is provided on the side of the mold groove (42) away from the triangular guide block (44). A bending block (46) is rotatably provided in the rotating groove (45). A rod (47) is fixedly provided at the top of the bending block (46). The rod (47) is movably engaged with the movable groove (313). A limiting groove (48) is provided in the rotating groove (45). A spring plate (49) is movably provided in the limiting groove (48). The spring plate (49) is fixedly connected to the bending block (46). The spring plate (49) and the limiting groove (48) are elastically connected by a number of evenly arranged arc springs (410).
6. The automatic bending device for steel door frames according to claim 5, characterized in that, The middle mold (5) is located in the middle of the gap between the upper mold (3) and the lower mold (4). The middle mold (5) includes two bottom modules (51) and two top modules (52). The two bottom modules (51) are provided with cavities (50) at opposite ends. The two cavities (50) are connected by opposing components (53). The bottom module (51) is provided with a sliding groove C (54) at the top. A sliding plate X (55) is slidably provided in the sliding groove C (54). The two top modules (52) are respectively provided at the top of the two sliding plates X (55). One of the top modules (52) is provided with a sliding groove D (56). A sliding plate Y (57) is slidably connected in the sliding groove D (56). The sliding plate Y (57) is fixedly connected to the other top module (52). The bottom module (51) is provided with sliding pillars (58) at both ends. One of the top modules (52) is provided with movable sliders (59) at both ends. A round hole (510) is provided on the movable slider (59).
7. The automatic bending device for steel door frames according to claim 6, characterized in that, The opposing assembly (53) includes a central shaft (531) and several sets of connecting rods (530). The top end of the central shaft (531) is provided with a sliding groove E (532). Each set of connecting rods (530) includes four rods arranged in a parallelogram. Two adjacent connecting rods (530) are rotatably connected by vertical rods (533). The two vertical rods (533) located in the axial direction are slidably connected to the sliding groove E (532). The two vertical rods (533) located in the radial direction are rotatably connected to the two cavities (50) respectively.
8. The automatic bending device for steel door frames according to claim 7, characterized in that, The adjusting mechanism (6) includes a fixed seat (60), a connecting disc (61), a gear ring (610), and a gear plate (611). The two fixed seats (60) are respectively fixed at both ends of the frame (1). The connecting disc (61) at the tail end is fixed on the fixed seat (60) at the tail end. A horizontal sliding groove (62) is opened at the top of the two connecting discs (61) with similar ends. A vertical sliding groove (63) is opened at the eccentric end of the horizontal sliding groove (62). The vertical sliding groove (63) and the horizontal sliding groove (62) form an L-shaped sliding cavity. The movable slider (59) is movably connected to the sliding cavity. Two sliding column grooves (64) are symmetrically opened at the bottom of the two connecting discs (61). A connecting groove (612) is opened in the gap between the two sliding column grooves (64). The two connecting grooves (612) are respectively connected to the two ends of the central shaft (531). The sliding column groove (64) is movably connected to the sliding column (58). The two connecting discs (61) are rotatably connected to the far ends of the two discs (65). The two adjusting discs (65) are provided with inclined guide grooves (66) at the near ends. The inclined guide grooves (66) are provided with arc guide grooves (67) at the eccentric ends of the inclined guide grooves (66). The inclined guide grooves (66) and the arc guide grooves (67) form a guide cavity. The guide cavity is movably connected to the movable block (68). The two movable blocks (68) are rotatably provided with connecting rods (69) at the near ends of the two movable blocks (68). The connecting rods (69) are movably connected to the round hole (510). The two toothed rings (610) are respectively fixed on the surface of the two adjusting discs (65). The two toothed plates (611) are respectively fixed on both sides of the movable end of the hydraulic mechanism (2) located above. The toothed rings (610) are meshed with the corresponding toothed plates (611).
9. The automatic bending device for steel door frames according to claim 8, characterized in that, A horizontal groove (601) is provided on the fixed base (60) at the head end. A sliding groove F (602) is connected to the horizontal groove (601). A sliding rod A (603) is slidably provided on the sliding groove F (602). A sliding rod B (604) is rotatably connected to the sliding rod A (603). The sliding rod B (604) is slidably engaged with the sliding groove F (602). A horizontal rod (605) is movably engaged in the horizontal groove (601) and fixedly connected to the sliding rod B (604). The end of the horizontal rod (605) away from the sliding rod B (604) passes through the horizontal groove (601) and is fixedly provided with a mounting base (607). The connecting disc (61) at the head end is fixedly mounted on the mounting base (607).
10. The automatic bending device for steel door frames according to claim 9, characterized in that, The mounting base (607) has an arc groove (608), the arc groove (608) has an insert groove (609), the insert groove (609) has a damping pad (610), and the damping pad (610) is movably connected to the adjustment plate (65) located at the head end.