Efficient flaring forming device for bent pipe

Abstract

The invention relates to the technical field of pipe fitting machining equipment, and particularly discloses an efficient bent pipe flaring forming device which comprises a machine box and pipe bending molds, a switching rotary disc is rotationally arranged on the upper surface of the machine box, and the pipe bending molds are evenly arranged on the upper surface of the switching rotary disc in the circumferential direction. Flaring mechanisms acting on two ports of a bent pipe in the pipe bending mold at the same time are arranged on the machine box, the pipe bending mold comprises a fixed module and a movable module, the fixed module is fixedly arranged on the upper surface of a switching rotary disc on the radial inner side of a first strip-shaped opening, and the movable module is arranged on a first sliding rail in a sliding mode and is aligned with the fixed module in the radial direction; the movable module is provided with a wheel shaft penetrating through the first strip-shaped opening and extending into the machine box, a guide wheel is arranged at the lower end of the wheel shaft, and a guide groove disc is fixedly arranged in the machine box. According to the efficient bent pipe flaring forming device, streamlined operation in the bent pipe flaring machining process is achieved, the machining efficiency of bent pipe flaring forming is improved, and the quality of finally-formed products is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of pipe processing equipment, and in particular discloses a high-efficiency expanding and forming device for bent pipes. Background Art

[0002] As a common pipe connector, elbows are usually sealed and welded with pipes to achieve the turning of the medium conveying path. In order to improve the sealing welding effect between the elbow and the pipeline, it is necessary to first expand the port of the elbow, and then insert the end of the pipeline into the expanded port for welding to ensure the welding seal and welding stability of the entire pipeline.

[0003] Traditional pipe bending and expanding machines are all semi-automatic processing. During the expanding and forming process, the operator puts the bent pipe into the fixture, and then presses the expanding die head into the bent pipe port through the hydraulic cylinder to form it. After completion, the bent pipe is removed and the port of the bent pipe is adjusted to perform the expanding and forming process at the other end. The above-mentioned expanding process of the entire bent pipe port is not only labor-intensive and inefficient, but the expanding and forming process will cause the bent pipe to heat up, and the operator is also prone to scalding during the process of manually switching the port of the bent pipe. Therefore, in view of the lack of efficient expanding and forming equipment specifically for pipe elbows on the market, this application proposes a high-efficiency expanding and forming device specifically for bent pipes, so that the expanding and forming process of the bent pipe is fully automated, reducing the labor intensity and safety hazards of the operators, and improving the efficiency of the expanding process of the bent pipe to meet the production capacity needs of the enterprise. Summary of the invention

[0004] The present invention aims to provide a high-efficiency expanding and forming device for a bent pipe, so as to realize automatic synchronous expanding and forming processing of two ends of the bent pipe, thereby improving the efficiency of the expanding and forming of the elbow.

[0005] The present invention is achieved through the following technical solutions: A high-efficiency expanding and forming device for bending pipes, comprising a chassis and a bending pipe die, wherein a switching turntable is rotatably arranged on the upper surface of the chassis, the bending pipe die is evenly arranged on the upper surface of the switching turntable in the circumferential direction, and an expanding mechanism is arranged on the chassis to simultaneously act on two ends of the bending pipe in the bending pipe die; The switch turntable is provided with a first strip opening and a first slide rail corresponding to each bending tube mold, and the first slide rail and the first strip opening are parallel and radially arranged, and the bending tube mold comprises a fixed module and a movable module, the fixed module is fixedly arranged on the upper surface of the switching turntable radially inner side of the first strip opening, the movable module is slidably arranged on the first slide rail and radially aligned with the fixed module, the opposite sides of the fixed module and the movable module are respectively provided with a first bending semicircular groove and a second bending semicircular groove, the movable module is provided with a wheel axle that passes through the first strip opening and extends to the interior of the chassis, and a guide wheel is provided at the lower end of the wheel axle, and a guide groove plate is fixedly arranged inside the chassis, and a guide ring groove formed by connecting a first arc segment, a transition connecting segment and a second arc segment is provided on the guide groove plate, the guide ring groove acts on the guide wheel, and the diameter of the first arc segment is smaller than the diameter of the second arc segment.

[0006] As a further configuration of the above scheme, the expanding mechanism includes two pushing blocks slidably arranged on the upper surface of the chassis, each pushing block is connected to a expanding die head through an extrusion rod, and the angle between the two extrusion rods is set to be the same as the fan angle of the bent pipe, and the chassis is provided with a pushing guide mechanism that enables the two expanding dies to act on the two ends of the bent pipe at the same time.

[0007] As a further arrangement of the above scheme, the upper surface of the chassis is provided with a second strip opening and a second slide rail perpendicular to the two first strip openings, the two pushing blocks are respectively slidably arranged on the corresponding second slide rails, and the pushing blocks are connected with guide columns arranged through the second strip openings, a hydraulic cylinder is arranged on the side of the chassis, the telescopic end of the hydraulic cylinder is connected with a push plate, the push plate is provided with two third strip openings perpendicular to the corresponding second strip openings, and the guide column passes through the lower end of the second strip opening and acts on the third strip opening.

[0008] As a further configuration of the above scheme, the first semicircular groove for the bent pipe and the second semicircular groove for the bent pipe, when closed, form a bent pipe channel having the same shape and size as the bent pipe, and both ends of the bent pipe channel are provided with expanding guide grooves that interact with the expanding die head.

[0009] As a further configuration of the above scheme, a bend adjustment mechanism is provided on the chassis, and the bend adjustment mechanism includes a bracket arranged on the upper surface of the chassis, an adjusting motor is installed on the upper end of the bracket, a radial bar is connected to the motor shaft of the adjusting motor, an arc rod aligned with the center ring line of the bend in the bend channel is provided at the end of the radial bar, and a limiting portion larger than the diameter of the bend is provided on the arc rod.

[0010] As a further configuration of the above scheme, a circular opening is provided on the upper surface of the chassis, the switching turntable is arranged in the circular opening, and a vertical shaft connected to the bearing at the bottom of the chassis is provided at the center of the switching turntable, a driving device for driving the vertical shaft to rotate at a fixed angle is provided on the chassis, and a through hole for passing the vertical shaft is provided at the center of the switching turntable.

[0011] As a further configuration of the above solution, a hood is provided above the chassis, and the hood is provided with an opening on one side facing the second arc segment.

[0012] During the operation of the high-efficiency expansion and forming device for bent pipes disclosed in the present invention, the switching turntable is rotated at a fixed angle under the action of the driving device to achieve the function of switching workstations. When the bent pipe mold on the switching turntable rotates to the fan-shaped area corresponding to the second semicircular groove of the bent pipe, the second semicircular groove of the bent pipe acts on the guide wheel, causing the movable module to move radially outward, thereby separating the fixed module and the movable module. At this time, the bent pipe is placed in the first semicircular groove of the bent pipe in the fixed module according to the rules by arranging operators or matching loading and unloading robots. After the loading is completed, the switching turntable is continued to be controlled to rotate to a set angle, so that when the bent pipe mold and the bent pipe enter the fan-shaped area corresponding to the first semicircular groove of the bent pipe, the first semicircular groove of the bent pipe acts on the guide wheel, causing the movable module to move radially inward, thereby pressing the movable module onto the fixed module. At this time, the bent pipe is clamped and positioned under the clamping action of the movable module and the fixed module.

[0013] After the bent pipe is clamped and positioned by the bending mold, it is rotated and switched to the bending adjustment mechanism, and then the adjusting motor is started to rotate the arc rod, thereby extending the arc rod from one end of the bent pipe until the limit portion contacts the end of the bent pipe, thereby driving the bent pipe to rotate in the bending channel to adjust the position of its port until the end of the bent pipe is flush with the outer end surface of the expansion guide groove.

[0014] After the elbow is adjusted, it is rotated to the position of the expansion mechanism, and then the expansion mechanism is started to simultaneously extend the two expansion dies into the two ends of the elbow, and the cooperation between the expansion die and the expansion guide groove can realize the rapid expansion and forming of the elbow port and ensure the product quality of the forming port.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The high-efficiency expansion forming device for bent pipes disclosed in the present invention realizes the streamlined operation of the expansion process of bent pipes by rotating the switching turntable with the bent pipe mold. At the same time, the movable module in the bent pipe mold automatically opens at the loading and unloading stations through the action between the guide wheel and the guide ring groove on the guide groove plate, and automatically closes to clamp the bent pipe at other processing stations. There is no need to set up a cylinder to drive the clamping, which simplifies the structure of the entire device. In addition, the expansion mechanism only needs to control the extension and contraction of the hydraulic cylinder to synchronously squeeze the two expansion dies into the two ports of the bent pipe to realize synchronous expansion and molding, which not only improves the processing efficiency of the expansion forming of the bent pipe, but also avoids the quality problem caused by the movement of the bent pipe in the bent pipe mold caused by squeezing the expansion die head from one side, and effectively guarantees the quality of the final formed product.

[0016] The present invention further provides a bending adjustment mechanism to rotate and move the bent pipe clamped in the bending mold, so that the two ends of the bent pipe can be flush with the outer end surface of the expanding guide groove before expansion molding, and then through the cooperation between the expanding die head and the expanding guide groove, the expansion molding quality of both ends of the bent pipe can be effectively guaranteed, so that the sealing effect and stability of the expanded bent pipe and the pipeline insertion welding are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the back three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the chassis, the switching turntable, the guide groove plate, etc. in the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the chassis, the expansion mechanism, etc. in the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the switching turntable, the pipe bending mold, etc. in the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the switching turntable, vertical shaft, etc. in the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the pipe bending mold in the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the elbow adjustment mechanism in the present invention. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 8 , and describes the application in detail with reference to embodiments. Example 1

[0021] Embodiment 1 discloses a high-efficiency expansion and forming device for a bent pipe, Figure 1 and attached Figure 2 The main part of the device includes a chassis 1, a hood 2, a control box 3 and a pipe bending mold 4. A plurality of legs 101 are provided on the lower surface of the chassis 1, and the hood 2 is fixedly mounted on the upper surface of the chassis 1, and an opening is provided on the front side of the hood 2 to facilitate the loading and unloading of the bent pipe.

[0022] Reference Figures 3-5 A circular opening 102 is provided on the upper surface of the chassis 1 and is located directly below the hood 2. A switching turntable 5 is provided in the circular opening 102. A vertical shaft 6 extending into the interior of the chassis 1 is provided at the center of the lower surface of the switching turntable 5. The lower end of the vertical shaft 6 is rotatably connected to a bearing 7 on the bottom wall of the chassis 1. A driving device 8 for driving the vertical shaft 7 to rotate at a fixed angle is also provided on the chassis 1. The specific driving device adopts a servo motor with a bevel gear transmission. The fixed-angle rotation switching of the switching turntable 5 can be realized by controlling the pulse signal of the servo motor.

[0023] Reference Figure 5 , Attachment Figure 6 and attached Figure 7, at least three radially arranged first strip openings 501 are evenly opened on the upper surface of the switching turntable 5, and there are four first strip openings 501 in total in this figure, and then a first slide rail 502 parallel to the first strip opening 501 is installed on the upper surface of the switching turntable 5 beside the first strip opening 501. The bending mold 4 includes a fixed module 401 fixedly connected to the upper surface of the switching turntable 5 radially inside the first strip opening 501, and a movable module 402 is slidably arranged on the first slide rail 502, and the fixed module 401 and the movable module 402 are aligned in the radial direction. A wheel shaft 403 is arranged on the lower surface of the movable module 402, which passes through the first strip opening 501 and extends to the inside of the chassis 1, and then a guide wheel 404 is rotatably arranged on the wheel shaft 403. A first bend semicircular groove 4011 adapted to the bend is provided on the radial outer end face of the fixed module 401, and a second bend semicircular groove 4021 adapted to the bend is provided on the radial inner end face of the movable module 402, so that after the first bend semicircular groove 4011 and the second bend semicircular groove 4021 are closed, a bend channel consistent with the shape and size of the bend can be formed, and corresponding expansion guide grooves 405 are provided at both ends of the bend channel, so that the expansion guide groove 405 is in the shape of a trumpet that is wide on the outside and narrow on the inside.

[0024] Reference Figure 3 A guide groove plate 9 is provided in the chassis 1 below the switching turntable 5. The two ends of the guide groove plate 9 are fixedly connected to the inner wall of the chassis 1 through the convex edges 901. At the same time, a through hole for penetrating the vertical shaft 7 is provided at the center of the guide groove plate 9. A guide ring groove 902 is provided on the outer circumference of the guide groove plate 9 to interact with the guide wheel 404. The guide ring groove 902 includes a first arc segment 9021 and a second arc segment 9022 with the through hole as the center. The diameter of the first arc segment 9021 is smaller than that of the second arc segment 9022, and the second arc segment 9022 faces the opening side of the hood 2. Then, a transition connection segment 9023 is provided between the ends of the first arc segment 9021 and the second arc segment 9022. When the guide wheel 404 interacts with the first arc segment 9021, the movable module 402 can be pressed onto the fixed module 401, thereby fixing the bent pipe in the bent pipe channel therebetween. When the guide wheel 404 interacts with the second arc segment 9022, the movable module 402 can be separated from the fixed module 401, and the operator can quickly put in or take out the bent pipe.

[0025] Finally, a flaring mechanism 10 is provided on the chassis 1 on the opposite side of the opening end of the hood 2. The flaring mechanism 10 includes two push blocks 11. A flaring die head 13 is connected to the end of each push block 11 through an extrusion rod 12. The angle between the two extrusion rods 12 is the same as the fan angle of the bend. Two second strip openings 503 are provided at the rear end of the upper surface of the chassis 1. The two second strip openings 503 are respectively arranged parallel to the corresponding extrusion rods 12, and a second slide rail 504 parallel to the second strip openings 503 is provided on the upper surface of the chassis 1. Then, the two push blocks 11 are respectively slidably connected to the corresponding second slide rails 504. Then, a guide column 111 is provided on the lower surface of the push block 11, which penetrates the second strip openings 503 and extends into the interior of the chassis 1. A push plate 14 is provided in the chassis 1 below the two second strip openings 503, and a hydraulic cylinder 15 connected to the push plate 14 is provided on the rear side of the chassis 1. Two third strip openings 141 are provided on the push plate 14, and the two third strip openings 141 are respectively arranged perpendicular to the corresponding second strip openings 503, and then the guide pillars 111 at the lower ends of the two push blocks 11 pass through the second strip openings 503 to interact with the third strip openings 141. In addition, in order to ensure the stable movement of the push plate 14, a guide rod 16 penetrating the rear side of the chassis 1 is also provided on the push plate 14.

[0026] During the operation of the high-efficiency expanding and forming device for bent pipes disclosed in this embodiment 1, the driving device 8 drives the switching turntable 5 to rotate and switch at a set angle. When the bent pipe mold 4 rotates to the front end opening of the hood 2, the movable module 402 is separated from the fixed module 401 due to the action of the guide wheel 404 and the second arc segment 9022 in the guide ring groove 902. At this time, the operator puts the bent pipe into the first bent pipe semicircular groove 4011 of the fixed module 401, and manually adjusts the two ends of the bent pipe to be flush with the first bent pipe semicircular groove 4011.

[0027] Subsequently, during the rotation switching process of the switching turntable 5, the group of bending molds 4 is rotated to the circumferential area corresponding to the first arc segment 9021. At this time, due to the action between the guide wheel 404 and the first arc segment 9021, the movable module 402 will be pressed onto the fixed module 401, thereby clamping and fixing the bent pipe before processing.

[0028] Then, the turntable 5 is switched to rotate the clamped bent pipe to the working position of the expanding mechanism 10, and then the hydraulic cylinder 15 is started to push the push plate 14 toward the center of the chassis 1. At this time, under the action of the guide column 111 and the second strip opening 503 and the third strip opening 141, the two push blocks 11 will move synchronously inward along the axial direction of the two ends of the bent pipe, and then under the action of the expanding die head 13 and the expanding guide groove 405 on the bending die 4, the two ends of the bent pipe will complete the expanding forming process.

[0029] When the elbow flaring process is completed, the hydraulic cylinder 15 is controlled to retract so that the entire flaring mechanism 10 is reset, and then the turntable 5 is switched to rotate the expanded elbow to the front end opening of the hood 2. At this time, the movable module 402 is separated from the fixed module 401 again, and the operator or robot can quickly remove it, and finally load the new elbow. Example 2

[0030] Example 2 discloses a high-efficiency expanding and forming device for bent pipes that is further optimized based on the technical solution in Example 1, and the similarities between it and Example 1 are not described here.

[0031] Reference Figure 3 and attached Figure 8 In this embodiment 2, a bend adjustment mechanism 17 is provided upstream of the expansion mechanism 10, and the bend adjustment mechanism 17 is used to align the ports of the bends in the bend channel formed by the movable module 402 and the fixed module 401, so that both ends of the bend can be aligned with the outer end faces of the expansion guide groove 405.

[0032] The elbow adjustment mechanism 17 in this embodiment 2 includes a bracket 171 fixedly arranged on the upper surface of the chassis 1, and the upper end of the bracket 171 extends to the top of the rotational movement track of the movable module 402. An adjustment motor 172 is installed at the upper end of the bracket 171, and a radial bar 173 is connected to the lower end of the motor shaft of the adjustment motor 172, and then an arc rod 174 is arranged at the end of the radial bar 173, and the arc rod 174 is aligned with the center loop of the elbow in the elbow channel, and a limiter 175 larger than the diameter of the elbow is arranged on the arc rod 174, and the limiter 175 can be a circular plate with a diameter larger than the diameter of the elbow or a cross structure.

[0033] When the bending tube mold 4 is clamped on the bent tube to be expanded and formed and rotated to the working position of the bending tube adjustment mechanism 17, the adjusting motor 172 is started to make the arc rod 174 extend from one end of the bent tube, so that the limiting part 175 abuts against the end of the bent tube, and then the limiting part 175 will carry the bent tube for rotation and movement adjustment in the bending tube channel until the end of the bent tube is flush with the outer end surface of the expansion guide groove 405, so as to avoid excessive extension of the bent tube end and cause quality problems after forming, thereby effectively ensuring the product quality of the bent tube expansion forming.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-efficiency expansion and forming device for bending pipes, comprising a chassis and a bending pipe die, characterized in that: The upper surface of the chassis is rotatably provided with a switching turntable, the tube bending mold is evenly arranged on the upper surface of the switching turntable in the circumferential direction, and the chassis is provided with an expansion mechanism that acts on the two ends of the tube bending in the tube bending mold at the same time; The switch turntable is provided with a first strip opening and a first slide rail corresponding to each bending tube mold, and the first slide rail and the first strip opening are parallel and radially arranged, and the bending tube mold comprises a fixed module and a movable module, the fixed module is fixedly arranged on the upper surface of the switching turntable radially inner side of the first strip opening, the movable module is slidably arranged on the first slide rail and radially aligned with the fixed module, the opposite sides of the fixed module and the movable module are respectively provided with a first bending semicircular groove and a second bending semicircular groove, the movable module is provided with a wheel axle that passes through the first strip opening and extends to the interior of the chassis, and a guide wheel is provided at the lower end of the wheel axle, and a guide groove plate is fixedly arranged inside the chassis, and a guide ring groove formed by connecting a first arc segment, a transition connecting segment and a second arc segment is provided on the guide groove plate, the guide ring groove acts on the guide wheel, and the diameter of the first arc segment is smaller than the diameter of the second arc segment.

2. The high-efficiency expansion forming device for bent pipes according to claim 1, characterized in that: The expansion mechanism includes two pushing blocks slidably arranged on the upper surface of the chassis, each pushing block is connected to a expansion die head through an extrusion rod, and the angle between the two extrusion rods is set to be the same as the fan angle of the bent pipe. The chassis is provided with a pushing guide mechanism that enables the two expansion dies to act on the two ends of the bent pipe at the same time.

3. The high-efficiency expansion forming device for bent pipes according to claim 2, characterized in that: The upper surface of the chassis is provided with a second strip opening and a second slide rail perpendicular to the two first strip openings, the two pushing blocks are respectively slidably set on the corresponding second slide rails, and the pushing blocks are connected with guide columns penetrating the second strip openings. A hydraulic cylinder is provided on the side of the chassis, and a push plate is connected to the telescopic end of the hydraulic cylinder. Two third strip openings perpendicular to the corresponding second strip openings are provided on the push plate, and the guide column penetrates the lower end of the second strip opening and acts on the third strip opening.

4. The high-efficiency expansion and forming device for bent pipes according to claim 2, characterized in that: The first pipe bend semicircular groove and the second pipe bend semicircular groove are closed to form a pipe bend channel with the same shape and size as the pipe bend, and both ends of the pipe bend channel are provided with expansion guide grooves that interact with the expansion die head.

5. The high-efficiency expansion forming device for bent pipes according to claim 4, characterized in that: The chassis is provided with a bend adjustment mechanism, which includes a bracket arranged on the upper surface of the chassis, an adjustment motor is installed on the upper end of the bracket, a radial bar is connected to the motor shaft of the adjustment motor, an arc rod aligned with the center ring line of the bend in the bend channel is provided at the end of the radial bar, and a limiting portion larger than the diameter of the bend is provided on the arc rod.

6. The high-efficiency expansion and forming device for bent pipes according to claim 1, characterized in that: A circular opening is provided on the upper surface of the chassis, the switching turntable is arranged in the circular opening, and a vertical shaft connected to the bearing at the bottom of the chassis is provided at the center of the switching turntable. A driving device for driving the vertical shaft to rotate at a fixed angle is provided on the chassis, and a through hole for passing the vertical shaft is provided at the center of the switching turntable.

7. The high-efficiency expansion and forming device for bent pipes according to claim 1, characterized in that: A hood is arranged above the chassis, and the hood is opened toward one side of the second arc segment.

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