Three-roller plate circular bending machine and operation method

Abstract

The invention provides a three-roller plate circular bending machine and an operation method, the three-roller plate circular bending machine comprises a rack structure, two symmetrically-arranged fixed carrier rollers are fixedly installed at the top of the rack structure, a lifting carrier roller is arranged on the upper portions of the fixed carrier rollers, and the lifting carrier roller is connected to the rack structure through two sets of lifting carrier roller support structures and carrier roller frame lifting adjusting structures through lead screws; one end of each lifting carrier roller is connected with a carrier roller driving device, and the two sets of lifting carrier roller support structures are connected through a lifting synchronizing mechanism. According to the device, the radius of a plate needing to be bent is changed by adjusting the distance between the lifting carrier roller and the fixed carrier roller, adjustment is achieved through the lead screw, the radius can be accurately adjusted, errors are small, and the device is simple and reliable in operation.

Description

Technical Field

[0001] The present invention relates to the field of plate processing, in particular to plate circular bending equipment that needs to bend large quantities of plates, and specifically to a three-roller plate circular bending machine and an operating method. Background Art

[0002] As a common industrial material, metal sheets often need to be bent into various shapes during processing. For circular bending of metal sheets, the current method is mostly the three-roller rolling method that uses the principle of three points forming a circle.

[0003] The Chinese patent with publication number CN205200252U discloses a three-roller plate rolling machine, which includes a base, a frame for supporting both ends of the plate rolling roller, and a driving mechanism for driving the plate rolling roller to rotate. The plate rolling roller includes an upper roller, two lower rollers arranged in a mirror image with respect to the upper roller and located below the upper roller, and the upper roller moves up and down through an adjustment mechanism, and the lower roller moves left and right through an adjustment mechanism. The adjustment of the bending radius of this three-roller plate rolling machine is achieved by adjusting the height of the upper roller and the distance between the lower rollers. According to the principle of three points forming a circle, it can be known that changing the radius of the circle only requires changing the height of the upper roller or the distance between the lower rollers. Since the height of the upper roller and the distance between the lower rollers can be adjusted, the functions of this solution are repeated, which not only has little practical significance, but also increases the manufacturing cost, and the mechanical structure is complicated and the reliability is reduced.

[0004] The Chinese patent with publication number CN111112398A discloses a three-roller plate rolling machine, including a frame, two lower rollers, an upper roller and a lifting mechanism. The lifting mechanism includes a lifting motor, a lifting reducer, a transmission shaft, a worm gear transmission assembly, a screw, a first lifting seat, a second lifting seat and an upper roller bearing seat. The lifting motor is fixed to the bottom of the frame, and the output shaft of the lifting motor is connected to the input shaft of the lifting reducer through a coupling. The output shafts on both sides of the lifting reducer are respectively connected to one end of the corresponding transmission shaft through a coupling. A worm gear transmission assembly is installed at the other end of each transmission shaft, and a screw is vertically arranged on the worm gear transmission assembly. The first lifting seat and the second lifting seat are relatively installed on the frame, and the bottoms of the first lifting seat and the second lifting seat are provided with screw holes for the screw to pass through. The two ends of the upper roller are respectively fixed to the first lifting seat and the second lifting seat through the upper roller bearing seat. This three-roller plate rolling machine optimizes the manual adjustment scheme of the upper roller height into a motor control method based on the scheme of CN111112398A. However, after adopting the motor control scheme, the transmission mechanism is complicated, the production cost is significantly increased, and the equipment reliability is reduced. Although the motor adjustment omits the operation of manual adjustment, in the processing of large-scale plate folding, there is no need to frequently adjust the height of the upper roller. The improvement improves the production efficiency very little, and the use of motor drive only increases the equipment cost in vain. Summary of the invention

[0005] The present invention provides a three-roller plate circular bending machine and an operating method. The device changes the radius of the plate to be bent by adjusting the distance between the lifting roller and the fixed roller, and is adjusted by a screw rod. The radius can be accurately adjusted with a small error, and the device is simple and reliable in operation.

[0006] In order to achieve the above-mentioned technical features, the purpose of the present invention is achieved as follows: a three-roller plate circular bending machine, characterized in that it includes a frame structure, two symmetrically arranged fixed rollers are fixedly installed on the top of the frame structure, the upper part of the fixed rollers is a lifting roller, and the lifting rollers are connected to the frame structure with a screw rod through two groups of lifting roller support structures and a roller frame lifting adjustment structure, one end of the lifting roller is connected to the roller driving device, and the two groups of lifting roller support structures are connected by a lifting synchronization mechanism.

[0007] The frame structure includes a bottom plate and a mounting platform, wherein the bottom plate is a long U-shaped plate, and the bottom plate and the mounting platform are connected by a steel rod; The mounting platform is a box-shaped body formed by welding front and rear steel plates and side plates, and a waste discharge port is provided at one end of the bottom.

[0008] The fixed roller is installed in the hole of the side plate and can rotate freely in the hole.

[0009] The surface of the lifting roller is bonded with a rubber sleeve layer, and the surface of the fixed roller is smooth.

[0010] Both sides of the lifting roller are installed in the bearings of the lifting roller support structure, and at the same time, one side of the lifting roller is connected to the output end of the reducer of the roller driving device through a coupling.

[0011] The lifting roller bracket structure consists of a bearing, a bearing holder, two vertical support rods and a horizontal support rod. A screw rod mounting hole is provided in the middle of the horizontal support rod, and the screw rod mounting hole is fixedly connected to one end of the screw rod of the lifting adjustment structure; the vertical support rod is fixedly installed at the two ends of the top of the horizontal support rod, and a bearing holder is fixedly installed between the tops of the vertical support rods, and the bearing is arranged between the bearing holders.

[0012] The roller frame lifting and adjusting structure is composed of a screw, a screw nut, a bearing seat, and a height adjustment rocker. The screw and the screw nut form a screw transmission. The screw nut is rotatably installed in the inner ring of the bearing in the bearing seat. The bearing seat is installed on the mounting table. The height adjustment rocker is fixedly connected to the bottom end of the screw nut, and the height adjustment of the screw is achieved through the height adjustment rocker.

[0013] The roller driving device is composed of a driving motor, a reducer, a coupling and a reducer mounting bracket. The main shaft of the driving motor is statically connected to the input end of the coupling, and the reducer is mounted on the bottom of the horizontal support rod through the reducer mounting bracket.

[0014] The lifting synchronization mechanism includes two gears and a chain. Each gear is statically installed at the bottom end of the screw nut of the two roller frame lifting adjustment structures, and the two gears are connected by chain transmission.

[0015] A method for operating a three-roller plate circular bending machine, the method being performed using the three-roller plate circular bending machine, comprising the following steps: Step 1: Adjust the bending radius of the sheet to be bent: Turn the height adjustment rocker, and under the transmission of the roller frame lifting adjustment structure and the roller driving device, adjust the lifting roller to a suitable height, thereby adjusting the gap between the lifting roller and the fixed roller, and then adjusting the bending radius of the plate to be bent; Step 2, start the device: Turn on the power of the driving motor, so that the lifting roller can be driven by the driving motor to transport and rotate; Step 3: Processing of the sheet to be bent: Align one end of the sheet to be bent and insert it into the gap between the lifting roller and the fixed roller on one side. Under the rotation of the lifting roller, the friction force of the lifting roller drives the sheet to be bent through the three rollers and bends. Step 4, continue rolling: After the first coiling of the sheet is completed, the height of the lifting roller is adjusted through the lifting and adjusting structure of the roller frame, and the gap between the lifting roller and the fixed roller is reduced, and the roller driving device is started to continue the coiling operation through the roller driving device; Step 5, removal of the cylinder: After rolling into a round shape, remove the cylinder.

[0016] Beneficial effects of the present invention: 1. This equipment changes the radius of the plate to be bent by adjusting the distance between the lifting roller and the fixed roller, and adjusts it through a screw rod. It can accurately adjust the radius with small errors, simple equipment and reliable operation.

[0017] 2. By designing the bottom plate into a U shape, the chain lubricating oil in the lifting synchronization mechanism and the fertilizer dropped from the waste discharge port are prevented from splashing everywhere, making it easier to clean.

[0018] 3. By installing the fixed roller in the hole, the fixed roller can rotate freely, which is convenient for the transmission of the plate to be bent during the bending process.

[0019] 4. By setting the rubber sleeve layer, the friction coefficient between the fixed roller and the plate to be bent is increased, which facilitates the transmission of the plate to be bent during the bending process.

[0020] 5. By setting the bearing, the lifting roller rotates smoothly.

[0021] 6. The bearing is installed on one end of the screw through the bearing holder and three support rods. The structure is simple and reliable.

[0022] 7. The relative position of the screw and the screw nut can be adjusted by turning the adjusting rocker, thereby adjusting the height of the lifting roller. The operation is simple and convenient.

[0023] 8. The high-speed motor input is converted into a low-speed lifting roller output through the reducer. The lifting roller has a large torque during rotation, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure from the first viewing angle of the present invention.

[0026] Figure 2 (a) and (b) are partial three-dimensional structural schematic diagrams of the present invention with the front (left) and rear (right) ends of the frame structure hidden.

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure from a second viewing angle of the present invention.

[0028] Figure 4 It is the front view of the present invention.

[0029] Figure 5 It is a top view of the present invention.

[0030] Figure 6 It is the right side view of the present invention.

[0031] Figure 7 It is a left view of the present invention.

[0032] In the figure: frame structure 1, fixed roller 2, lifting roller 3, lifting roller support structure 4, roller frame lifting adjustment structure 5, roller driving device 6, lifting synchronization mechanism 7; Bottom plate 11, mounting platform 12, side plate 13, waste discharge port 14; Bearing 41, bearing holder 42, vertical support rod 43, horizontal support rod 44, screw rod mounting hole 45; Screw 51, screw nut 52, bearing seat 53, height adjustment rocker 54; Coupling 61, reducer 62, drive motor 63, reducer mounting bracket 64; Gear 71, chain 72. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0034] Embodiment 1: like Figure 1-7 As shown, the three-roller plate circular bending machine is characterized in that it includes a frame structure 1, two symmetrically arranged fixed rollers 2 are fixedly installed on the top of the frame structure 1, and the upper part of the fixed roller 2 is a lifting roller 3, and the lifting roller 3 is connected to the frame structure 1 through two sets of lifting roller support structures 4 and the roller frame lifting adjustment structure 5 by a screw rod, and one end of the lifting roller 3 is connected to the roller driving device 6, and the two sets of lifting roller support structures 4 are connected by a lifting synchronization mechanism 7. This equipment adopts the method of adjusting the distance between the lifting roller 3 and the fixed roller 2 to change the radius of the plate to be bent, and it is adjusted by a screw rod, which can accurately adjust the size of the radius, with small error, simple equipment, and reliable operation.

[0035] Furthermore, the frame structure 1 includes a bottom plate 11 and a mounting platform 12, wherein the bottom plate 11 is a U-shaped long plate, and the bottom plate 11 and the mounting platform 12 are connected by a steel rod; the mounting platform 12 is a box-shaped box body formed by welding front and rear steel plates and side plates 13, and a waste discharge port 14 is provided at one end of the bottom. The bottom plate is designed to be U-shaped, which can prevent the chain lubricating oil in the lifting synchronization mechanism 7 and the fertilizer dropped from the waste discharge port 14 from splashing everywhere, and is easy to clean.

[0036] Furthermore, the fixed roller 2 is installed in the hole of the side plate 13 and can rotate freely in the hole. The fixed roller 2 can rotate freely, which is convenient for conveying the plate to be bent during the bending process.

[0037] Furthermore, the surface of the lifting roller 3 is bonded with a rubber sleeve layer, and the surface of the fixed roller 2 is smooth. The setting of the rubber sleeve layer increases the friction coefficient between the fixed roller 2 and the plate to be bent, which facilitates the transmission of the plate to be bent during the bending process.

[0038] Furthermore, both sides of the lifting roller 3 are installed in the bearings 41 of the lifting roller support structure 4, and one side of the lifting roller 3 is connected to the output end of the reducer 62 of the roller driving device 6 through the coupling 61. The setting of the bearing 41 allows the lifting roller 3 to rotate smoothly.

[0039] Furthermore, the lifting roller support structure 4 is composed of a bearing 41, a bearing holder 42, two vertical support rods 43 and a horizontal support rod 44. A screw rod mounting hole 45 is provided in the middle of the horizontal support rod 44. The screw rod mounting hole 45 is fixedly connected to one end of a screw rod 51 of the lifting adjustment structure 5. The vertical support rod 43 is fixedly installed at both ends of the top of the horizontal support rod 44. A bearing holder 42 is fixedly installed between the tops of the vertical support rods 43. The bearing 41 is arranged between the bearing holders 42. The bearing is installed at one end of the screw rod through the bearing holder 42 and the three support rods, and the structure is simple and reliable.

[0040] Furthermore, the roller frame lifting adjustment structure 5 is composed of a screw 51, a screw nut 52, a bearing seat 53, and a height adjustment rocker 54. The screw 51 and the screw nut 52 form a screw transmission match. The screw nut 52 is rotatably installed in the inner ring of the bearing in the bearing seat 53. The bearing seat 53 is installed on the mounting platform 12. The height adjustment rocker 54 is fixedly connected to the bottom end of the screw nut 52, and the height adjustment of the screw 51 is achieved through the height adjustment rocker 54. The height adjustment of the lifting roller 3 can be achieved through the above-mentioned roller frame lifting adjustment structure 5. During the working process, the screw nut 52 can be adjusted by rotating the adjustment rocker 54, and the screw nut 52 drives the screw 51 to perform lifting and lowering adjustment, thereby adjusting the height of the lifting roller 3, and the operation is simple and convenient.

[0041] Furthermore, the roller drive device 6 is composed of a driving motor 63, a reducer 62, a coupling 61 and a reducer mounting bracket 64. The main shaft of the driving motor 63 is statically connected to the input end of the coupling 61, and the reducer 62 is mounted on the bottom of the horizontal support rod 44 through the reducer mounting bracket 64. The roller drive device 6 can be used to provide the power for rolling. During the working process, the high-speed motor input is converted into a low-speed lifting roller 3 output through the reducer 62, and the lifting roller 3 has a large torque during the rotation process, which is safe and reliable.

[0042] Furthermore, the lifting synchronization mechanism 7 includes two gears 71 and a chain 72, each gear 71 is statically mounted on the bottom end of the screw nut 52 of the two roller frame lifting adjustment structures 5, and the two gears 71 are connected by a chain 72. The lifting synchronization mechanism 7 ensures that the lifting rollers 3 on both sides can be driven to lift synchronously. During the working process, the screw rotation angle in the roller frame lifting adjustment structure 5 is synchronized by the chain 72, so that the heights of the two sides of the lifting rollers 3 are consistent, and the lifting rollers 3 are always parallel to the fixed rollers 2, ensuring the normal progress of the bending process.

[0043] Embodiment 2: A method for operating a three-roller plate circular bending machine, the method being performed using the three-roller plate circular bending machine, comprising the following steps: Step 1: Adjust the bending radius of the sheet to be bent: The height adjustment rocker 54 is rotated to adjust the lifting roller 3 to a suitable height under the transmission of the roller frame lifting adjustment structure 5 and the roller driving device 6, so as to adjust the gap between the lifting roller 3 and the fixed roller 2, and further adjust the bending radius of the plate to be bent; Step 2, start the device: The power supply of the driving motor 63 is turned on, so that the lifting roller 3 is driven by the driving motor 63 to transport and rotate; Step 3: Processing of the sheet to be bent: Align one end of the plate to be bent and insert it into the gap between the lifting roller 3 and the fixed roller 2 on one side. Under the rotation of the lifting roller 3, the friction force of the lifting roller 3 drives the plate to be bent through the three rollers and bends; Step 4, continue rolling: After the first winding of the sheet is completed, the height of the lifting roller 3 is adjusted through the roller frame lifting adjustment structure 5, and the gap between the lifting roller 3 and the fixed roller 2 is reduced, and the roller driving device 6 is started to continue the rolling operation through the roller driving device 6; Step 5, removal of the cylinder: After rolling into a round shape, remove the cylinder.

Claims

1. Three-roller plate circular bending machine, characterized in that: The invention comprises a frame structure (1), wherein two symmetrically arranged fixed rollers (2) are fixedly mounted on the top of the frame structure (1), and a lifting roller (3) is disposed on the upper part of the fixed roller (2). The lifting roller (3) is connected to the frame structure (1) by a screw rod through two sets of lifting roller support structures (4) and a roller support lifting adjustment structure (5). One end of the lifting roller (3) is connected to a roller driving device (6), and the two sets of lifting roller support structures (4) are connected by a lifting synchronization mechanism (7).

2. The three-roller plate circular bending machine according to claim 1, characterized in that: The frame structure (1) comprises a bottom plate (11) and a mounting platform (12); the bottom plate (11) is a long U-shaped plate; the bottom plate (11) and the mounting platform (12) are connected via steel rods; The mounting platform (12) is a box-shaped body formed by welding front and rear steel plates and side plates (13), and has a waste discharge port (14) at one end of the bottom.

3. The three-roller plate circular bending machine according to claim 2, characterized in that: The fixed roller (2) is installed in a hole of the side plate (13) and can rotate freely in the hole.

4. The three-roller plate circular bending machine according to claim 1, characterized in that: The lifting roller (3) has a rubber sleeve layer bonded to its surface, and the fixed roller (2) has a smooth surface.

5. The three-roller plate circular bending machine according to claim 1, characterized in that: Both sides of the lifting roller (3) are mounted in bearings (41) of the lifting roller support structure (4), and one side of the lifting roller (3) is connected to the output end of the reducer (62) of the roller driving device (6) via a coupling (61).

6. The three-roller plate circular bending machine according to claim 1, characterized in that: The lifting roller support structure (4) is composed of a bearing (41), a bearing holder (42), two vertical support rods (43) and a horizontal support rod (44); a screw rod mounting hole (45) is provided in the middle of the horizontal support rod (44); the screw rod mounting hole (45) is fixedly connected to one end of a screw rod (51) of the lifting adjustment structure (5); the vertical support rod (43) is fixedly mounted at the two ends of the top of the horizontal support rod (44); a bearing holder (42) is fixedly mounted between the tops of the vertical support rods (43); and the bearing (41) is arranged between the bearing holders (42).

7. The three-roller plate circular bending machine according to claim 2, characterized in that: The roller frame lifting adjustment structure (5) is composed of a screw (51), a screw nut (52), a bearing seat (53), and a height adjustment rocker (54). The screw (51) and the screw nut (52) form a screw transmission match. The screw nut (52) is rotatably mounted in the inner ring of the bearing in the bearing seat (53). The bearing seat (53) is mounted on the mounting platform (12). The height adjustment rocker (54) is fixedly connected to the bottom end of the screw nut (52), and the height adjustment rocker (54) is used to achieve height adjustment of the screw (51).

8. The three-roller plate circular bending machine according to claim 6, characterized in that: The roller drive device (6) is composed of a drive motor (63), a reducer (62), a coupling (61) and a reducer mounting bracket (64); the main shaft of the drive motor (63) is statically connected to the input end of the coupling (61); and the reducer (62) is mounted on the bottom of the horizontal support rod (44) via the reducer mounting bracket (64).

9. The three-roller plate circular bending machine according to claim 1, characterized in that: The lifting synchronization mechanism (7) comprises two gears (71) and a chain (72), each gear (71) being statically mounted on the bottom end of a screw nut (52) of two roller frame lifting adjustment structures (5), and the two gears (71) are connected by a transmission through the chain (72).

10. An operating method of a three-roller plate circular bending machine, characterized in that: The method is carried out using a three-roller plate circular bending machine as described in any one of claims 1 to 9, and comprises the following steps: Step 1: Adjust the bending radius of the sheet to be bent: The height adjustment rocker (54) is rotated to adjust the lifting roller (3) to a suitable height under the transmission of the roller frame lifting adjustment structure (5) and the roller driving device (6), thereby adjusting the gap between the lifting roller (3) and the fixed roller (2), and further adjusting the bending radius of the plate to be bent; Step 2, start the device: The power supply of the driving motor (63) is turned on, so that the lifting roller (3) is driven by the driving motor (63) to transport and rotate; Step 3: Processing of the sheet to be bent: Align one end of the plate to be bent and insert it into the gap between the lifting roller (3) and the fixed roller (2) on one side, and when the lifting roller (3) rotates, the friction force of the lifting roller (3) drives the plate to be bent to pass through the three rollers and bend; Step 4, continue rolling: After the first winding of the plate is completed, the height of the lifting roller (3) is continuously adjusted through the roller frame lifting and adjusting structure (5), and the gap between the lifting roller (3) and the fixed roller (2) is reduced, and the roller driving device (6) is continuously started, and the rolling operation is continued through the roller driving device (6); Step 5, removal of the cylinder: After rolling into a round shape, remove the cylinder.

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