Metal exhaust pipe short pipe corrugation forming device

Abstract

The utility model discloses a metal exhaust pipe short pipe corrugation forming device which comprises a first pushing assembly and a forming assembly, and the first pushing assembly is used for pushing a short pipe into the forming assembly and continuously driving the short pipe to move. The forming assembly comprises a first fastening component, a second fastening component and an expansion claw located between the first fastening component and the second fastening component, the first fastening component and the second fastening component are arranged in a spaced mode, a conical surface is arranged on the periphery of the expansion claw, a second pull rod is arranged in the expansion claw in a penetrating mode and used for enabling the expansion claw to expand outwards, the expansion claw can be reset, and the end of the second pull rod extends to the outside to be connected with a ninth driver. The first fastening part and the second fastening part are connected with a tenth driver and an eleventh driver respectively, the tenth driver and the eleventh driver push the first fastening part and the second fastening part to be away from each other or close to each other respectively, corrugations are formed in an extrusion mode, and the formed short pipe corrugations have better ductility. Compared with an extrusion forming mode, the forming mode of transverse compression can reduce friction to a short pipe, the pipe wall is prevented from being thinned, and meanwhile the pipe wall is prevented from being torn in the rolling forming process.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal exhaust pipe production equipment, in particular to a short-tube corrugated forming device for a metal exhaust pipe. Background Art

[0002] Gas water heaters use liquefied petroleum gas or natural gas as fuel. The heat generated by combustion is transferred to the water through a heat exchanger to heat it up. The gases generated during combustion need to be discharged to the outside world. Therefore, each combustion water heater will have an exhaust pipe, which usually has a straight section and a curved section. Usually, the exhaust pipe is produced in sections. Because if an integrated molding method is adopted, in order to accommodate the long metal pipe while keeping the steps unchanged, each placement position needs to be made very long, and the processing equipment needs to be made very large. Therefore, basically, segmented production is adopted, that is, the main pipe and the short pipe are produced separately. However, the current production process still requires a lot of manual assistance, and there is no complete automated assembly line production. Materials need to be continuously transferred and processed, which results in long production time and low efficiency.

[0003] In order to solve the above problems, the company has developed a full-process exhaust pipe production line to achieve automated application. Figure 1 As shown, the specific steps include main pipe front section processing 1, main pipe punching 2, main pipe end cover installation 3, short pipe corrugation forming 4, main pipe and short pipe combination and bending 5; this application protects the short pipe corrugated forming structure.

[0004] In addition, the existing corrugated forming equipment usually uses rolling to form indentations on metal pipes, which look like corrugated shapes, but have weak tensile strength and can only bend at small angles. In addition, the gas pipe is relatively thin, and rolling can easily deform the exhaust pipe and tear the pipe wall. Utility Model Content

[0005] The purpose of the utility model is to provide a corrugated forming device for a short tube of a metal exhaust pipe, so as to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A corrugated forming device for a short metal exhaust pipe comprises a pushing component and a forming component, wherein the pushing component is used to push the short pipe into the forming component and continuously drive the short pipe to move;

[0008] The forming assembly includes a fastening component 1 and a fastening component 2 that are spaced apart, and an expansion claw located therebetween. The expansion claw has a conical surface on its outer periphery, and a pull rod 2 is passed through its interior. The pull rod 2 is used to expand the expansion claw outward, and the expansion claw is resettable. The two ends of the pull rod extend to the outside and are connected to the driver 9. The fastening component 1 and the fastening component 2 are respectively connected to the driver 10 and the driver 11, and the driver 10 and the driver 11 respectively push the fastening component 1 and the fastening component 2 away from or closer to each other.

[0009] According to a further technical solution, a conical contact head is provided at one end of the pull rod.

[0010] A further technical solution is that the fastening component one and the fastening component two have the same structure, the fastening component two includes a movable plate, and cylinder seven is respectively installed on the upper and lower sides of the movable plate. Two fastening plates are longitudinally slidably connected on the end surface of the movable plate, and a semicircular forming groove is provided on the side where the two fastening plates are close to each other, and an air avoidance groove is provided in the semicircular forming groove.

[0011] A further technical solution also includes a fixed plate 2 and a fixed plate 3, wherein the fixed plate 2 and the fixed plate 3 are connected by a number of guide columns, and the several guide columns pass through the fastening component 1 and the fastening component 2, and the driver 10 and the driver 11 are respectively installed on the fixed plate 2 and the fixed plate 3.

[0012] A further technical solution is that the driver nine includes a cylinder eight and a guide cylinder installed on a fixed plate three, the guide cylinder is connected to the expansion claw through a plurality of claws, the cylinder eight is connected to the pull rod two through a connecting piece four, and the pull rod two penetrates the guide cylinder and extends to the expansion claw.

[0013] A further technical solution is that the pushing component 1 includes a bracket 3, in which a driver 12 and a supporting bracket are installed, the movable end of the driver 12 is connected to an extension rod, the end of the extension rod is installed with an air claw 4, the four annular array of the air claws is provided with several action ends, the action ends are connected to a resistance part 2, and the supporting bracket is provided with several rollers 4 along the moving direction of the short tube.

[0014] A further technical solution is that the support bracket is composed of two bearing plates, and a transmission rod is provided on one side of the two bearing plates. The transmission rod is rotatably connected to the bracket two, and a transmission block one is fixedly connected to one end of the transmission rod. The transmission block one is provided with a pulley, and the pulley is placed on the movable groove of the transmission block two. The transmission block two is provided at the output end of the cylinder nine, and the cylinder nine is installed on the bracket two.

[0015] According to a further technical solution, a pre-placement position is provided above the supporting frame, and the pre-placement position can be opened and closed.

[0016] Beneficial effects of the utility model:

[0017] The utility model adopts an extrusion method to form the corrugations, so that the formed short tube corrugations have better ductility and can have a larger bending angle when bending, which is comparable to plastic corrugated tubes. In addition, the use of a transverse compression method can reduce the friction on the short tube compared to the extrusion molding method, avoid thinning of the tube wall, and avoid tearing of the tube wall during the rolling molding process.

[0018] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : Distribution map of automated production equipment.

[0020] Figure 2 : A three-dimensional structural diagram of the utility model.

[0021] Figure 3 : Structural diagram of the molding component of the present utility model.

[0022] Figure 4 : Disassembly diagram of the molding components of the present invention.

[0023] Figure 5 : Nine structural diagrams of the expansion claw and driver of the present utility model.

[0024] Figure 6 : Schematic diagram of the structure of the second implementation mode of the expansion claw of the present invention.

[0025] Figure 7 : A structural diagram of a push assembly of the present utility model.

[0026] Reference numerals: 41-pushing component 1, 411-bracket 3, 412-driver 12, 4131-carrying plate, 4132-transmission rod, 4133-transmission block 1, 4134-pulley, 4135-movable groove, 4136-transmission block 2, 4137-cylinder 9, 414-extension rod, 415-air claw 4, 416-interference part 2, 417-roller 4, 418-pre-placement position, 42-molding component, 43-fastening component 1, 44-fastening component 2, 441-moving plate, 442-cylinder 7, 44 3-semicircular forming groove, 444-air avoidance groove, 445-fixing plate two, 446-fixing plate three, 447-guide column, 448-fastening plate, 45-expansion claw, 451-floating block, 452-support shaft, 453-limiting groove, 454-clamping part, 46-pull rod two, 461-inclined clamping groove, 47-conical contact head, 48-driver nine, 481-cylinder eight, 482-guide cylinder, 483-claw, 484-connecting part four, 491-driver ten, 492-driver eleven, 493-conveyor device. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0028] Please refer to Figure 1-7 ;

[0029] The forming device of the present invention forms corrugations in a manner different from rolling, thereby avoiding tearing of the tube wall; specifically, it includes a pushing component 1 41 and a forming component 42. The forming component 42 in this embodiment uses a transverse extrusion method to cause the tube wall to bulge outward to form corrugations, wherein the structure adopted includes a fastening component 1 43 and a fastening component 2 44 arranged at intervals, and an expansion claw 45 located therebetween. The expansion claw 45 has a conical surface on its outer periphery, and a pull rod 2 46 is passed through its interior. The end of the pull rod 2 46 extends to the outside and is connected to the driver 9 48. The fastening component 1 43 and the fastening component 2 44 are respectively connected to the driver 10 491 and the driver 11 492.

[0030] During operation, the pushing component 1 41 fixes one end of the short tube and pushes it into the forming component 42. The short tube passes through the fastening component 1 43 and the fastening component 2 44 in turn, and the expansion claw 45 penetrates the short tube. Then the fastening component 1 43 and the fastening component 2 44 start to move to clamp the short tube. At the same time, the pushing component 1 41 loosens the short tube, and the driver 9 48 drives the pull rod 2 46 to move. The pull rod 2 46 links the expansion claw 45 to expand it outward, that is, its outer diameter increases to push the wall of the short tube from the inside out, forming a conical protrusion between the fastening component 1 43 and the fastening component 2 44. The conical protrusion is corrugated. The initial shape provides a template for further forming, and then the fastening component 1 43 and the fastening component 2 44 are pushed closer to each other by the driver 10 491 and the driver 11 492. Since the short tube is clamped, the conical protrusion will be squeezed and flattened when approaching each other. Of course, the flattening here does not mean that the two side surfaces fit each other, but that they are as close as possible and a certain gap is reserved, thus completing a corrugation forming operation; then the expansion claw 45 is reset to reduce the outer diameter, and the pushing component 1 41 fixes the short tube again to change its position, and then repeats the above action to complete the forming of the next corrugation, and so on.

[0031] The short tube described in the utility model has a wall thickness of 0.5mm-1.5mm. By forming convex corrugations outward, it has better ductility and can have a larger bending angle when bending, which is comparable to plastic corrugated tubes. In addition, it is formed by transverse compression, which can reduce friction on the short tube compared to the extrusion molding method, avoid thinning of the tube wall, and avoid tearing of the tube wall during the rolling molding process.

[0032] There are two structures of the expansion claw 45;

[0033] The first way, refer to Figure 5 The expansion claw 45 is composed of a plurality of floating blocks 451 in an annular array. The outer periphery of the floating block 451 is fastened by an annular tension spring (not shown). A conical surface is provided on the floating block 451. A conical contact head 47 is provided at the end of the second pull rod 46. When the second pull rod 46 is pulled, the conical contact head 47 will shrink toward the inner cavity enclosed by the floating blocks 451, thereby pushing the plurality of floating blocks 451 outward, thereby increasing the outer diameter.

[0034] The second method, refer to Figure 6 , including a hollow support shaft 452, through which the pull rod 2 46 passes, and a plurality of limit grooves 453 connected to the interior are provided in an annular array on the outer periphery of the support shaft 452, and a floating block 451 is provided in the limit groove 453, and one end of the floating block 451 extends to the interior, and one end of the floating block 451 is provided with an inclined clamping portion 454, and the outer periphery of the pull rod 2 46 is provided with an inclined clamping groove 461 that cooperates with the clamping portion 454. The floating block 451 is limited to only longitudinal movement, and the inclined clamping groove 461 of the pull rod 2 46 becomes higher and higher, thereby pushing the floating block 451 out. Conversely, the inclined clamping groove 461 becomes lower and lower, and the floating block 451 will also drop and reset. It should be noted that a conical surface is provided on the floating block 451, but the conical surface is not shown in the drawings. Therefore, the drawings are only used as structural examples for explanation and should not be used as a limitation on the scope of protection.

[0035] The fastening component 1 43 and the fastening component 2 44 in the present invention have the same structure. The fastening component 2 44 will be used as an example for explanation. Figure 4 , specifically including a movable plate 441, on the upper and lower sides of which cylinders seven 442 are respectively installed, and two fastening plates 448 are longitudinally slidably connected on the end surface of the movable plate 441, and a semicircular forming groove 443 is provided on the side where the two fastening plates 448 are close to each other; when the short tube is inserted, it is located between the two semicircular forming grooves 443, and then the two cylinders seven 442 respectively push the two fastening plates 448 close to each other, and form a circular limiting groove 453 to clamp the short tube; preferably, an air avoidance groove 444 is provided in the semicircular forming groove 443, and after completing one corrugated protrusion, when entering the next corrugated protrusion forming process, the previous corrugated protrusion can enter the air avoidance groove 444, such a design can make two adjacent corrugated protrusions close to each other, that is, forming a continuous state of wave crests and wave troughs without interruption, which is more conducive to large-angle bending.

[0036] Furthermore, it also includes a fixing plate 2 445 and a fixing plate 3 446, which are connected by a number of guide columns 447. The number of guide columns 447 pass through the fastening component 1 43 and the fastening component 2 44, and play a role in limiting and guiding the two. The driver 10 491 and the driver 11 492 are respectively installed on the fixing plate 2 445 and the fixing plate 3 446. Preferably, the driver 10 491 and the driver 11 492 can be devices such as cylinders and electric cylinders that can output power in a linear manner.

[0037] Based on the first mode of expansion claw 45, one embodiment of driver nine 48, refer to Figure 5 , specifically including cylinder eight 481 and guide cylinder 482 installed on fixed plate three 446, guide cylinder 482 is connected to expansion claw 45 through several claws 483, in this embodiment, each claw 483 corresponds to two adjacent floating blocks 451, and the enclosed shape and movable range of several floating blocks 451 are limited by claw 483, so that they can only move longitudinally relative to claw 483, that is, expand outward, cylinder eight 481 is connected to pull rod two 46 through connector four 484, pull rod two 46 penetrates into guide cylinder 482 and extends to expansion claw 45, and pull rod two 46 is driven by cylinder eight 481 to telescope, so that pull rod two 46 drives conical contact head 47 to enter and exit the enclosed space of several floating blocks 451, thereby expanding its outer diameter.

[0038] One embodiment of the push component 41 of the present invention, referring to Figure 7 Specifically, it includes a third bracket 411, in which a driver 12 412 and a support bracket are installed. The moving end of the driver 12 412 is connected to an extension rod 414, and an end of the extension rod 414 is installed with a fourth air gripper 415. The fourth air gripper 415 is provided with a plurality of action ends in a circular array, and the action ends are connected to a second abutment portion 416. The support bracket is provided with a plurality of fourth rollers 417 along the moving direction of the short tube;

[0039] First, the short tube falls into the support bracket, and then the driver twelve 412 drives the extension rod 414 and the air gripper four 415 to penetrate into the short tube. When it reaches a certain position, the air gripper four 415 pushes the interference part two 416 to extend horizontally, so that several interference parts two 416 interfere with the inner wall of the short tube to achieve fixation. Preferably, the air gripper four 415 is a circular air gripper. Then the driver twelve 412 starts again and continues to move forward. At this time, the short tube can be pushed to move and enter the forming component 42. Since the short tube will shrink during the process of forming the corrugation, the air gripper four 415 releases the fixation of the short tube after pushing the short tube to reach the position. After completing a corrugated bulge processing, the air gripper four 415 extends the interference part two 416 again to fix the short tube, and the driver twelve 412 starts again to change the position of the short tube.

[0040] In another embodiment, the contact end of the contact part 2 416 is in an arc shape, and the external force applied by the air claw 415 to the inner wall of the short tube is not large. On the contrary, the contraction force of the fastening component 1 43 and the fastening component 2 44 when forming the corrugated protrusion is much greater than the friction force between the contact part 2 416 and the inner wall of the short tube. Therefore, in this embodiment, the air claw 4 415 does not contract when forming the corrugated protrusion, and maintains a state of contact with the inner wall of the short tube, and can also pull the short tube to contract, which can reduce the control steps.

[0041] In the present invention, there are multiple molding components 42. Under normal circumstances, the number of pushing components 41 corresponds to one, but more parts are needed. In order to simplify the structure, every two molding devices correspond to one pushing component 41. More specifically, they share a driver twelve 412. Driver twelve 412 can be a combination of a motor and a pulley group. A connecting block is provided on the pulley group. Driver twelve 412 is set in the middle. The extension rod 414 is "L"-shaped, and the two extension rods 414 are respectively connected to the connecting block.

[0042] Furthermore, the support frame is composed of two bearing plates 4131, one side of the two bearing plates 4131 is provided with a transmission rod 4132, the transmission rod 4132 is rotatably connected to the bracket 2, one end of the transmission rod 4132 is fixedly connected to the transmission block 1 4133, the transmission block 1 4133 is provided with a pulley 4134, the pulley 4134 is placed on the movable groove 4135 of the transmission block 2 4136, the transmission block 2 4136 is provided at the output end of the cylinder 9 4137, and the cylinder 9 4137 It is installed on bracket two, and the transmission block two 4136 is driven by cylinder nine 4137 to move, so that the pulley 4134 moves between the interactive grooves, thereby changing the angle of the transmission block one 4133, and at the same time linking the transmission rod 4132 to rotate it, so as to realize the opening and closing of the two bearing plates 4131. A conveying device 493 is provided under the support bracket. The processed short tube is pulled out into the support bracket, and then the support bracket is opened to allow the short tube to fall into the conveying device 493 and be transported to the next process flow.

[0043] In addition, a pre-placement position 418 is provided above the support frame. The pre-placement position 418 can be opened and closed. For details, please refer to the implementation method of the carrier frame. A short tube can be pre-stored above. After completing the processing of a short tube, the carrier frame releases the short tube to the conveying device 493. The pre-placement position 418 located above releases the processed short tube into the support frame, which reduces waiting time and improves work efficiency.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0045] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A corrugated forming device for a short metal exhaust pipe, comprising a pushing component (41) and a forming component (42), wherein the pushing component (41) is used to push the short pipe into the forming component (42) and continuously drive the short pipe to move, and is characterized in that: The molding assembly (42) includes a fastening component 1 (43) and a fastening component 2 (44) that are spaced apart, and an expansion claw (45) located between the two. The expansion claw (45) is provided with a conical surface on its outer periphery, and a pull rod 2 (46) is passed through its interior. The pull rod 2 (46) is used to expand the expansion claw (45) outward, and the expansion claw (45) can be reset. The end of the pull rod 2 (46) extends to the outside and is connected to the driver 9 (48). The fastening component 1 (43) and the fastening component 2 (44) are respectively connected to the driver 10 (491) and the driver 11 (492). The driver 10 (491) and the driver 11 (492) respectively push the fastening component 1 (43) and the fastening component 2 (44) away from or closer to each other.

2. A corrugated forming device for a short metal exhaust pipe according to claim 1, characterized in that: One end of the second pull rod (46) is provided with a conical contact head (47).

3. The corrugation forming device for a short metal exhaust pipe according to claim 1, characterized in that: The fastening component 1 (43) and the fastening component 2 (44) have the same structure. The fastening component 2 (44) includes a movable plate (441). The movable plate (441) is respectively provided with a cylinder 7 (442) on its upper and lower sides. Two fastening plates (448) are longitudinally slidably connected on the end surface of the movable plate (441). A semicircular forming groove (443) is provided on the side where the two fastening plates (448) are close to each other. A space-avoiding groove (444) is provided in the semicircular forming groove (443).

4. The corrugation forming device for a short metal exhaust pipe according to claim 3, characterized in that: It also includes a fixing plate 2 (445) and a fixing plate 3 (446), wherein the fixing plate 2 (445) and the fixing plate 3 (446) are connected via a plurality of guide columns (447), and the plurality of guide columns (447) pass through the fastening component 1 (43) and the fastening component 2 (44), and the driver 10 (491) and the driver 11 (492) are respectively mounted on the fixing plate 2 (445) and the fixing plate 3 (446).

5. The corrugation forming device for a short metal exhaust pipe according to claim 4, characterized in that: The driver nine (48) includes a cylinder eight (481) and a guide cylinder (482) installed on a fixed plate three (446), the guide cylinder (482) is connected to the expansion claw (45) through a plurality of claws (483), the cylinder eight (481) is connected to the pull rod two (46) through a connecting piece four (484), and the pull rod two (46) penetrates the guide cylinder (482) and extends to the expansion claw (45).

6. The corrugation forming device for a short metal exhaust pipe according to claim 1, characterized in that: The pushing component 1 (41) includes a bracket 3 (411), in which a driver 12 (412) and a support bracket are installed. The moving end of the driver 12 (412) is connected to an extension rod (414), and an air claw 4 (415) is installed at the end of the extension rod (414). The air claw 4 (415) is provided with a plurality of action ends in a circular array, and the action ends are connected to a resistance part 2 (416). The support bracket is provided with a plurality of rollers 4 (417) along the moving direction of the short tube.

7. The corrugation forming device for a short metal exhaust pipe according to claim 6, characterized in that: The support frame is composed of two bearing plates (4131). A transmission rod (4132) is provided on one side of the two bearing plates (4131). The transmission rod (4132) is rotatably connected to the second bracket. A transmission block (4133) is fixedly connected to one end of the transmission rod (4132). A pulley (4134) is provided on the transmission block (4133). The pulley (4134) is placed on the movable groove (4135) of the second transmission block (4136). The second transmission block (4136) is provided at the output end of the ninth cylinder (4137). The ninth cylinder (4137) is installed on the second bracket.

8. The corrugation forming device for a short metal exhaust pipe according to claim 7, characterized in that: A pre-placement position (418) is provided above the support frame, and the pre-placement position (418) can be opened and closed.

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