Bent pipe forming system

Abstract

The utility model belongs to the technical field of bent pipe machining, and discloses a bent pipe forming system. The bent pipe forming system comprises a pipe bending machine, an inert gas conveying assembly and a control center, a to-be-treated pipeline is arranged on the pipe bending machine, the to-be-treated pipeline comprises a straight pipe part and a bent part which are connected, the pipe bending machine drives the straight pipe part to move in the first direction, the straight pipe part is heated and then bent in the second direction to form the bent part, and a bent pipe is formed through bending forming; the inert gas conveying assembly conveys inert gas into the to-be-treated pipeline. The inert gas conveying assembly is used for conveying the inert gas into the to-be-treated pipeline, so that the flow and the oxygen content of the inert gas in the to-be-treated pipeline are reasonably controlled, the inner wall of the to-be-treated pipeline is prevented from being oxidized in the bending forming process, the inert gas is introduced in the bending forming process, polishing is not needed after bending forming, and the production efficiency is improved. And the quality of the inner wall of the bent pipe can be effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe bending processing technical field especially relates to a pipe bending forming system. BACKGROUND

[0002] With the continuous development of technology, pipe bending is widely used in pipeline systems, mechanical equipment and automobile manufacturing and many other aspects. Pipe bending adopts a complete bending equipment for bending processing and mainly adopts two processes of cold bending or hot pushing.

[0003] In the prior art, in the process of processing the pipe to be processed, the inner wall of the pipe to be processed is in contact with air and oxidizes to form a large number of oxide layers, resulting in a decrease in the quality of the inner wall of the pipe. The conventional treatment method is to separately polish the inner wall of the formed pipe, but the polishing technology is difficult to meet the precision requirements of the product, and it will be difficult to polish the pipe with a large bending radius.

[0004] That is, in the prior art, the pipe is processed by the method of forming first and then polishing, which has the shortcomings that it is difficult to polish the pipe with a large bending radius and it is still difficult to meet the product precision requirements after polishing. INVENTION CONTENTS

[0005] The utility model aims at providing a pipe bending forming system to solve the problem that the pipe in the prior art is processed by the method of forming first and then polishing, which is difficult to polish the pipe with a large bending radius and is still difficult to meet the product precision requirements after polishing.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a pipe bending forming system, which comprises:

[0008] A pipe bender, the pipe to be processed is arranged on the pipe bender, the pipe to be processed comprises a straight pipe part and a bending part connected thereto, the pipe bender drives the straight pipe part to move in a first direction and bends the straight pipe part in a second direction after heating to form the bending part, and the pipe is formed by bending.

[0009] An inert gas delivery assembly for delivering inert gas into the pipe to be processed;

[0010] A control center, the pipe bender is electrically connected to the control center to control the pipe bending forming quality.

[0011] As an optional technical scheme of the pipe bending forming system, the inert gas delivery assembly comprises:

[0012] A gas source for providing the inert gas;

[0013] A conveying pipe is arranged between the gas source and the pipe to be processed, and is used to convey the inert gas into the straight pipe part and the curved pipe part.

[0014] As an optional technical scheme of the pipe bending forming system, the inert gas conveying assembly further comprises an oxygen detector and a flow detector, and the oxygen detector and the flow detector are arranged on the conveying pipe and are respectively used to detect the oxygen content in the conveying pipe and the flow of the inert gas.

[0015] As an optional technical scheme of the pipe bending forming system, the pipe to be processed has two pipe openings at two ends, and the two pipe openings are respectively located at the end of the straight pipe part and the end of the curved pipe part, the gas source is arranged at the pipe opening close to the curved pipe part, and the inert gas conveying assembly is used to convey the inert gas from the curved pipe part to the straight pipe part.

[0016] As an optional technical scheme of the pipe bending forming system, the oxygen detector and the flow detector are arranged at the pipe opening close to the straight pipe part.

[0017] As an optional technical scheme of the pipe bending forming system, the pipe bending machine comprises a traction assembly and a pushing assembly, the traction assembly is used to bend the curved pipe part in the second direction, and the pushing assembly is used to push the straight pipe part to move in the first direction.

[0018] As an optional technical scheme of the pipe bending forming system, the pushing assembly comprises a pushing piece, and the end of the straight pipe part abuts against the surface of the pushing piece.

[0019] As an optional technical scheme of the pipe bending forming system, the traction assembly comprises:

[0020] a main shaft and a rotating arm, the rotating arm can rotate around the main shaft;

[0021] and a clamping piece arranged on the rotating arm and clamping the end of the curved pipe part.

[0022] As an optional technical scheme of the pipe bending forming system, the pipe bending machine further comprises a heater, and the heater is arranged on the straight pipe part and is used to heat the pipe to be processed.

[0023] As an optional technical scheme of the pipe bending forming system, the heater is arranged around the outer periphery of the straight pipe part.

[0024] Beneficial effects:

[0025] The utility model provides a kind of elbow forming system, the elbow forming system includes elbow bender, inert gas conveying component and control center, by setting elbow bender drive the straight pipe portion of pipe to be handled moves and heats bending forming to form elbow, inert gas is conveyed to the pipe to be handled using inert gas conveying component, to control the inert gas flow and oxygen content in the pipe to be handled reasonably, avoid oxidation in the inner wall of the pipe to be handled in bending forming process, inert gas is passed in the process of bending forming, after bending forming, it is not necessary to carry out polishing to reduce cost, the quality and corrosion resistance of elbow inner wall can be effectively guaranteed;By setting control center, elbow bender is electrically connected with control center, utilize control center to control the data collection and parameter control of elbow forming, with the advantages of high degree of automation, stable and controllable processing quality and simple structure and wide application range. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the structure schematic diagram of elbow forming system provided by the utility model embodiment.

[0027] In the drawing:

[0028] 1, pipe to be handled;11, straight pipe portion;12, bending portion;

[0029] 2, elbow bender;21, traction assembly;22, push assembly;23, heater;

[0030] 3, inert gas conveying component;31, gas source;32, oxygen meter;33, flow detector;34, flow controller;

[0031] 4, control center. DETAILED DESCRIPTION

[0032] The utility model will be further explained in detail in connection with the drawings and embodiment.It can be understood that the specific embodiment described here is only used to explain the utility model, and is not limited to the utility model.In addition, it should be noted that, for convenience of description, only part of the structure related to the utility model is shown in the drawing, not all structures.

[0033] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements or the interaction relationship of two elements.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] like Figure 1 As shown, this utility model provides a pipe bending forming system for processing bent pipes. The pipe bending forming system includes a pipe bending machine 2, an inert gas conveying assembly 3, and a control center 4. The pipe to be processed 1 is set on the pipe bending machine 2. The pipe to be processed 1 includes a straight pipe section 11 and a bent section 12 connected together. The pipe bending machine 2 drives the straight pipe section 11 to move along a first direction and heats the straight pipe section 11 and bends it in a second direction to form the bent section 12, thus forming a bent pipe. The inert gas conveying assembly 3 is used to convey inert gas into the pipe to be processed 1. The pipe bending machine 2 is electrically connected to the control center 4 to control the quality of the pipe bending forming.

[0037] The pipe bending forming system provided by this utility model uses a pipe bending machine 2 to drive the straight pipe section 11 of the pipe to be processed 1 to move and heat it to form a bent pipe. An inert gas conveying component 3 is used to transport inert gas into the pipe to be processed 1, thereby reasonably controlling the flow rate and oxygen content of the inert gas in the pipe to be processed 1, avoiding oxidation of the inner wall of the pipe to be processed 1 during the bending process. The introduction of inert gas during the bending process eliminates the need for polishing after bending, reducing costs. The quality and corrosion resistance of the inner wall of the bent pipe can be effectively guaranteed. By setting up a control center 4, the pipe bending machine 2 is electrically connected to the control center 4. The control center 4 is used to control the data collection and parameter control of the bending forming. It has the advantages of high automation, stable and controllable processing quality, simple structure and wide applicability.

[0038] Specifically, the pipe bending machine 2 includes a base plate for placing the pipe 1 to be processed. The base plate includes a first base plate and a second base plate. The first base plate and the second base plate are assembled and are in an L-shape. The first base plate and the second base plate are on the same plane. The first base plate and the second base plate can be detachably connected by screws or buckles. The straight pipe section 11 is disposed on the first base plate, and the bending section 12 is disposed on the second base plate.

[0039] In this embodiment, the first direction and the second direction always have an included angle α. After heating the straight pipe section 11, the pipe bending machine 2 bends it along a partially circular trajectory with a preset radius or an arc trajectory with a preset radius of curvature. In this embodiment, the included angle α between the first direction and the tangent of the partially circular trajectory with a preset radius or the tangent of the arc trajectory with a preset radius of curvature is in the range of 0°<α≤270°; the bending trajectory is a quarter-circular trajectory.

[0040] Furthermore, the pipe bending machine 2 includes a traction component 21 and a pushing component 22. The traction component 21 is used to traction the bending section 12 to bend along a second direction, and the pushing component 22 is used to push the straight pipe section 11 to move along a first direction. By setting the traction component 21 and the pushing component 22 in cooperation, the pipe to be processed 1 is bent into shape while moving; the strain of the bent pipe is controlled by adjusting the pushing speed of the pushing component 22 to adjust the moving speed of the pipe to be processed; and the thickness of the bent pipe is controlled by adjusting the bending speed of the traction component 21 to adjust the bending speed. The pipe bending machine 2 can adopt a self-made pipe bending structure or a medium-frequency pipe bending machine with medium-frequency induction heating.

[0041] Specifically, the pushing assembly 22 includes a pushing member, with the end of the straight tube 11 abutting against the surface of the pushing member. By setting the pushing member to push against the end of the straight tube 11, the straight tube 11 is subjected to uniform force and the direction of movement of the straight tube 11 is easily controlled. In this embodiment, a guide member extending along a first direction is provided on the first substrate, and the pushing member is slidably disposed on the first substrate and moves along the guide member. The guide member is a guide rail or a guide groove. The pushing assembly 22 also includes a first driving component, which provides power to the pushing member. The first driving component adopts common screw drive, gear drive, or motor drive methods, and controls the moving speed of the pushing member through a motor or reducer.

[0042] Furthermore, the traction assembly 21 includes a main shaft, a rotating arm, and a clamping member. The rotating arm can rotate around the main shaft, and the clamping member is disposed on the rotating arm and clamps the end of the bent portion 12. By configuring the main shaft, the rotating arm, and the clamping member, the clamping member can traction the bent portion 12 to move in the second direction when the rotating arm rotates around the main shaft.

[0043] In this embodiment, the traction assembly 21 further includes a second driving component, which is hydraulically driven. The main shaft is mounted on the second base plate, and the second driving component can drive the rotating arm to rotate around the main shaft, thereby causing the bent portion 12 to bend along with the clamping member rotating around the main shaft. The preset radius of the bending trajectory is the distance between the clamping member and the main shaft, which is the bending radius of the bent portion 12. In other embodiments, the bending trajectory can also be changed by setting the rotating arm to extend or retract.

[0044] Specifically, the main shaft is cylindrical, the rotating arm is a rod with a circular or rectangular cross-section; the clamping component includes an annular body and clamping parts, with multiple clamping parts spaced circumferentially around the annular body. Each clamping part has an arc-shaped clamping surface at its front end, located near the center of the annular body. The clamping parts can move radially along the annular body to adjust the position of the clamping surface, allowing multiple clamping surfaces to accommodate bends 12 of different sizes. Preferably, the annular body has a through hole, and the clamping parts pass through this hole and are fixed in position by nuts. Multiple clamping parts are evenly spaced. The bend 12 passes through the annular body, with the center of the annular body coinciding with the centerline of the bend 12.

[0045] In order to heat the pipe 1 to be processed, the pipe bending machine 2 also includes a heater 23, which is disposed in the straight pipe section 11 for heating the pipe 1 to be processed. By setting the heater 23 to heat the pipe 1 to be processed, preparation is made for bending.

[0046] Preferably, the heater 23 is arranged around the outer periphery of the straight pipe section 11. By arranging the heater 23 around the outer periphery of the straight pipe section 11, the heating of the straight pipe section 11 is uniform in the circumferential direction, which helps to ensure the quality of the bent pipe after bending.

[0047] In this embodiment, the heater 23 is located between the pusher and the clamping member; the heating process of the heater 23 includes the following stages: in the first stage, the straight tube 11 within the heating range is initially heated at a first heating rate; in the second stage, the temperature of the straight tube 11 is rapidly passed through the sensitization temperature range at a second heating rate to avoid phase transformation of the metal structure, wherein the second heating rate is greater than the first heating rate; in the third stage, the heating rate is restored to the first heating rate, so that the temperature of the straight tube 11 is kept uniform before bending begins.

[0048] It is understood that both the first and second drive components are electrically connected to the control center 4. The control center 4 includes a controller, a signal converter, and a detection component. The signal converter is used to convert the data from the detection component into signals for transmission to the controller.

[0049] In this embodiment, the detection components include a sensor and a thermometer. The sensor is installed on the bending section 12 to detect strain; the thermometer is installed on the pipe bending machine 2 to detect the heating temperature of the pipe 1 to be processed; the control center 4 controls the heater 23 of the pipe bending machine 2 to heat the pipe to a preset temperature and then bends it at a preset speed and bending angle. The driving force of the first driving component and the second driving component is adjusted according to the measured strain data to achieve effective control of the bending process.

[0050] To achieve the delivery of inert gas, the inert gas delivery assembly 3 includes a gas source 31 and a delivery pipeline. The gas source 31 provides inert gas, and the delivery pipeline connects the gas source 31 and the pipeline to be treated 1. The delivery pipeline delivers the inert gas to the straight section 11 and the bend section 12. By setting up the delivery pipeline to deliver the inert gas to the pipeline to be treated 1, in this embodiment, the delivery pipeline, the gas source 31, and the pipeline to be treated 1 form a closed loop. An exhaust valve is provided on the delivery pipeline to discharge the air in the pipeline to be treated 1. The straight section 11 is located between the exhaust valve and the bend section 12. When initially delivering inert gas, the exhaust valve is in the open state. When the inert gas concentration in the pipeline to be treated 1 reaches a certain level, the exhaust valve is closed to achieve a closed loop of inert gas.

[0051] Furthermore, the inert gas delivery assembly 3 also includes an oxygen analyzer 32 and a flow meter 33. Both the oxygen analyzer 32 and the flow meter 33 are installed on the delivery pipeline and are used to detect the oxygen content and the flow rate of the inert gas in the pipeline, respectively. By installing the oxygen analyzer 32 and the flow meter 33 to detect the air replacement in the pipeline 1 to be treated, it is convenient to monitor and adjust the delivery of the inert gas in a timely manner.

[0052] In this embodiment, both the oxygen analyzer 32 and the flow meter 33 are located between the exhaust valve and the pipeline to be treated 1; a flow controller 34 is provided between the gas source 31 and the pipeline to be treated 1 to control the flow rate of the inert gas.

[0053] Specifically, the pipeline to be treated 1 has openings at both ends, located at the ends of the straight section 11 and the bend section 12, respectively. A gas source 31 is positioned near the opening of the bend section 12, and an inert gas delivery assembly 3 is used to deliver inert gas from the bend section 12 towards the straight section 11. Preferably, an oxygen analyzer 32 and a flow meter 33 are positioned near the opening of the straight section 11. By placing the gas source 31 at the opening of the bend section 12 and delivering inert gas from the bend section 12 to the straight section 11, the air inside the bend section 12 is preferentially replaced by the inert gas, which helps prevent oxidation of the inner wall of the bend section 12. By placing the oxygen analyzer 32 and the flow meter 33 near the opening at the end of the straight section 11, the flow rate and oxygen content of the inert gas after passing through the pipeline to be treated 1 are detected, effectively inferring the flow rate and oxygen content within the pipeline to be treated 1.

[0054] The following is the processing procedure for pipe bending:

[0055] First, the inner wall of the pipe to be processed 1 is polished and cleaned. The pipe to be processed 1 is placed on the first base plate of the pipe bending machine 2. The relevant devices and components of the pipe bending forming system are assembled and set up, especially the pusher and clamping components.

[0056] The inert gas delivery assembly 3 is activated, which allows the inert gas to replace the air in the pipeline 1 to be treated, maintaining a stable delivery of the inert gas. The heater 23 is activated to heat the pipeline 1 to be treated. The straight pipe section 11 is moved along the first direction and the bending section 12 is bent along the second direction by the traction assembly 21 and the pushing assembly 22 working together, thereby bending the pipe into shape in an inert gas atmosphere.

[0057] After the bent pipe is formed, it is cooled. After cooling, the supply of inert gas is stopped, and the bent pipe is inspected.

[0058] It is important to note that during the entire pipe bending process, attention must be paid to the polishing quality and cleanliness of the inner wall before processing, the control of relevant system parameters during processing (such as moving speed or heating temperature), the sealing of the inert gas delivery pipeline, and the control of the heating stage by heater 23. By continuously trying and adjusting to effectively control the above factors, the roughness of the inner wall of the bent pipe is not reduced and there is no oxidation color, so as to obtain a bent pipe product that meets the requirements.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pipe bending forming system, characterized in that, include: A pipe bending machine (2) is used to process a pipe (1). The pipe (1) to be processed is set on the pipe bending machine (2). The pipe (1) to be processed includes a straight pipe section (11) and a bent section (12) connected together. The pipe bending machine (2) drives the straight pipe section (11) to move in a first direction and heats the straight pipe section (11) and bends it in a second direction to form the bent section (12). The pipe is bent into a bent pipe. An inert gas delivery assembly (3) is used to deliver inert gas into the pipeline (1) to be treated; The control center (4) is electrically connected to the pipe bending machine (2) to control the pipe bending forming quality.

2. The pipe bending forming system according to claim 1, characterized in that, The inert gas delivery assembly (3) includes: Gas source (31) for providing the inert gas; A delivery pipe, connecting the gas source (31) and the pipe to be processed (1), is used to deliver the inert gas to the straight pipe section (11) and the curved section (12).

3. The pipe bending forming system according to claim 2, characterized in that, The inert gas delivery assembly (3) further includes an oxygen meter (32) and a flow meter (33). The oxygen meter (32) and the flow meter (33) are both installed on the delivery pipeline and are used to detect the oxygen content in the delivery pipeline and the flow rate of the inert gas, respectively.

4. The pipe bending forming system according to claim 3, characterized in that, The two ends of the pipe to be processed (1) are respectively provided with pipe openings, and the two pipe openings are respectively located at the ends of the straight pipe section (11) and the bend section (12). The gas source (31) is provided near the pipe opening of the bend section (12). The inert gas delivery assembly (3) is used to deliver the inert gas from the bend section (12) toward the straight pipe section (11).

5. The pipe bending forming system according to claim 4, characterized in that, The oxygen analyzer (32) and the flow meter (33) are located near the inlet of the straight pipe section (11).

6. The pipe bending forming system according to claim 1, characterized in that, The pipe bending machine (2) includes a traction assembly (21) and a pushing assembly (22). The traction assembly (21) is used to traction the bending section (12) to bend along the second direction, and the pushing assembly (22) is used to push the straight pipe section (11) to move along the first direction.

7. The pipe bending forming system according to claim 6, characterized in that, The pushing assembly (22) includes a pushing member, and the end of the straight tube (11) abuts against the surface of the pushing member.

8. The pipe bending forming system according to claim 6, characterized in that, The traction assembly (21) includes: A main shaft and a rotating arm, wherein the rotating arm is rotatable about the main shaft; And a clamping member, which is disposed on the rotating arm and clamps the end of the bent portion (12).

9. The pipe bending forming system according to any one of claims 1-8, characterized in that, The pipe bending machine (2) also includes a heater (23), which is disposed on the straight pipe section (11) for heating the pipe (1) to be processed.

10. The pipe bending forming system according to claim 9, characterized in that, The heater (23) is arranged around the outer periphery of the straight tube section (11).

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