A necking device for metal pipe production and a necking method thereof

Abstract

The application is suitable for the technical field of metal pipe production, and provides a necking device for metal pipe production and a necking method thereof, which comprises a base, a positioning assembly mounted on the top of the base, a feeding assembly, a transfer assembly and two sets of necking assemblies, and adjusting assemblies are mounted on the top of the two sets of necking assemblies. The device solves the problems of square tube rigid collision, channel congestion, square tube tilting misplacement and the resulting stoppage, wear and reduction of processing precision caused by improper stacking mode during square tube necking processing. The device is provided with a moving seat which can slide on the second guide rail, so that the distance between the two guide plates can be flexibly adjusted, the effect of adapting to pipe fittings of different lengths and expanding the application range is achieved, the guide plate and the limiting plate are separated, the two ends of the pipe fitting extend to the outside of the guide plate, the deformation position is staggered with the guide plate, the effects of avoiding material jamming and congestion and ensuring continuous production are achieved, and the situation of reducing stacking tilting misplacement and reducing equipment wear is achieved.

Description

Technical Field

[0001] This invention relates to the field of metal pipe manufacturing technology, and more specifically, to a pipe-reducing device and method for metal pipe manufacturing. Background Technology

[0002] Metal pipe processing refers to a series of mechanical processing, forming, and connection processes on metal pipes to meet the specific needs of different industries for pipe size, shape, and performance. The necking process is an important forming operation for the ends in metal pipe processing. It uses external force to reduce the diameter of the pipe end, forming a specific stepped, conical, or arc transition structure to meet functional requirements such as connection sealing and assembly positioning.

[0003] The mold system applies directional force to the end of the metal pipe and controls the plastic deformation of the material. The concave mold provides radial constraint to limit the material from expanding outward, while the convex mold applies axial pressure to make the material break through the yield limit. The deformation is concentrated in the end transition zone, which realizes the precise shrinkage of the pipe end size. In order to improve the automation level, multiple metal pipes are stacked and transported during the shrinking process. Then, the metal pipes are fed one by one for the shrinking operation.

[0004] Currently, when feeding square tubes during the narrowing process, the stacking method easily causes the guide components to jam. Due to the rectangular cross-section and angular characteristics and deformation of the square tubes, when the square tubes enter the guide channel, they may experience rigid collisions due to space constraints. When the deformation position of the end is inside the channel, it is easy to get stuck in the guide channel, which can lead to congestion. Furthermore, the unstable stacking posture can cause tilting and misalignment, which not only leads to machine downtime but also wears down and reduces processing accuracy. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a necking device and a necking method for the production of metal pipe fittings.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a necking device for the production of metal pipe fittings, comprising a base, a positioning component, a feeding component, a transfer component, and two sets of necking components mounted on the top of the base, wherein an adjustment component is mounted on the top of each of the two sets of necking components, the feeding component and the transfer component are both located on one side of the positioning component, and an auxiliary component is mounted on the top of the feeding component.

[0007] The positioning assembly includes a gantry mounted on top of the base.

[0008] The feeding assembly includes two sets of second guide rails mounted on the top of the base. Two movable seats slide on the top of the two sets of second guide rails. A trapezoidal frame is mounted on the top of each movable seat. A guide plate is mounted on the top of the trapezoidal frame. A limit plate is provided above the guide plate. A movable block is connected to the top of each limit plate. A protrusion is connected to the top of the movable block. The protrusion is connected to the bottom of the gantry frame.

[0009] The present invention is further configured such that: both sets of the necking components are located on the side of the gantry away from the feeding component and are symmetrically arranged; each set of the necking components includes two first guide rails; a slide block is slidably connected to the top of the two first guide rails; a drive cylinder is installed on the top of the base and between the two first guide rails; the piston rod end of the drive cylinder is connected to the corresponding slide block; a fixing plate is installed on the top of each slide block; and a clamping mechanism is installed on the opposite side of the two fixing plates.

[0010] The present invention is further configured such that: the positioning component further includes a lifting cylinder disposed on one side of the base, the piston rod end of the lifting cylinder extends to the top of the base and is connected to a lower mold, and an adjustment mechanism is installed on the top of the gantry frame, the adjustment mechanism extending to the top of the lower mold.

[0011] The present invention is further configured such that: the adjusting mechanism includes a first cylinder horizontally installed on the top of the gantry frame, a connecting plate is installed at the end of the piston rod of the first cylinder, a second cylinder is vertically installed downward on one side of the connecting plate, an upper mold is installed at the end of the piston rod of the second cylinder, and the upper mold is configured to cooperate with the lower mold.

[0012] By adopting the above technical solution, the movable seat is set to slide on the second guide rail, which can flexibly adjust the distance between the two guide plates, thus achieving the effect of adapting to pipes of different lengths and expanding the scope of application. By setting the guide plate and the limiting plate to be separated, the two ends of the pipes extend to the outside of the guide plate and the deformation position is staggered from the guide plate, thus achieving the effect of avoiding material jamming and congestion and ensuring continuous production. The above settings reduce the situation of stacking tilting and misalignment and reduce equipment wear.

[0013] The present invention is further configured such that: the auxiliary component includes a support plate installed on the top of the two limiting plates, an auxiliary cylinder is installed on the top of the support plate, the piston rod of the auxiliary cylinder faces away from the gantry and is connected to an auxiliary plate, two auxiliary rods are symmetrically connected to the side of the auxiliary plate near the auxiliary cylinder, two auxiliary tubes are symmetrically connected to the top of the support plate, the two auxiliary tubes are correspondingly arranged with the two auxiliary rods, and the auxiliary rods pass through the interior of the corresponding auxiliary tubes.

[0014] The present invention is further configured such that: a push plate is hinged to the bottom of the auxiliary plate, a baffle is installed on the side of the auxiliary plate away from the auxiliary cylinder, the side wall of the baffle is in contact with the side wall of the push plate, and two spring plates are connected between the side wall of the auxiliary plate and the side wall of the push plate.

[0015] The present invention is further configured such that: both sets of adjustment components include adjustment cylinders, the adjustment cylinders are installed on the top of the corresponding slides, the piston rod end of the slides is connected to an adjustment block, a through groove is opened on one side of the fixing plate, the adjustment block is slidably connected to the inside of the corresponding through groove, and an adjustment rod is connected to one side of the adjustment block.

[0016] The present invention is further configured such that: the adjusting rod is a U-shaped structure, and both ends of the adjusting rod are connected to horizontal extension sections, one of which is connected to one side of the corresponding adjusting block.

[0017] The present invention is further configured such that: the transfer assembly is located between the feeding assembly and the lower mold; the transfer assembly includes a base plate mounted on the top of the base and two hinge seats mounted on the top of the base plate; a rotating rod is rotatably connected between the two hinge seats; a motor is mounted on one side of one of the hinge seats; the output end of the motor is connected to one end of the rotating rod; two swing plates are connected to the outer wall of the rotating rod; a transfer block is connected to the end of the two swing plates away from the rotating rod; and a transfer groove is formed on the side of the transfer block away from the swing plates.

[0018] By adopting the above technical solution and setting auxiliary components, including an auxiliary cylinder on the support plate, a push plate and a spring plate hinged to the auxiliary plate and limited by the baffle, when the metal pipe is offset or tilted, or the end is stuck and cannot be picked up by the transfer groove, the auxiliary cylinder drives the auxiliary plate to move, and the push plate squeezes the pipe to shift the whole, achieving the effect of ensuring that the foremost pipe falls completely into the transfer groove, avoiding deviating from the preset path, and ensuring that the transfer block is lifted smoothly and the pipe is transferred, thus ensuring the stable operation of feeding and necking. By setting adjustment components, including an adjustment cylinder installed on the top of the slide, an adjustment block connected to the piston rod, and a U-shaped adjustment rod passing through the through groove, when the transfer block picks up the pipe, the slide drives the adjustment components to move so that the adjustment rod is inserted into the pipe. The adjustment cylinder drives the adjustment rod to lift the pipe and slide it to one corner inside, and then fall back to reset, thus ensuring that the angle of the pipe is matched with the transfer groove, ensuring the stability of the position during the transfer process, and ensuring the accurate angle when it is subsequently placed into the lower mold.

[0019] A method for reducing the length of metal pipe fittings during production, using a reducing device for metal pipe fittings as described above, includes the following steps:

[0020] S1. The metal pipe fittings to be produced are placed inside the feeding assembly for guiding and conveying, so that multiple metal pipe fittings are continuously fed.

[0021] S2. Subsequently, the metal pipe at the front of the feeding component is obtained by the transfer component, the position of the obtained metal pipe is adjusted by the adjustment component, and then the transfer component transfers the metal pipe to the position of the positioning component to wait for the pipe shrinking operation.

[0022] S3. After that, the positioning component lifts and clamps the metal pipe, the transfer component resets and acquires the next metal pipe;

[0023] S4. Subsequently, the shrinking assembly shrinks both ends of the clamped metal pipe. After the shrinking is completed, the shrinking metal pipe is unloaded by an external robotic arm, the positioning assembly is reset, and then the transfer assembly can be used to load the pipe again.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] (1) By setting the movable seat to slide on the second guide rail, the distance between the two guide plates can be flexibly adjusted, which achieves the effect of adapting to pipes of different lengths and expanding the scope of application. By setting the guide plate and the limit plate to separate, the two ends of the pipes extend to the outside of the guide plate and the deformation position is staggered from the guide plate, which achieves the effect of avoiding material jamming and congestion and ensuring continuous production. The above settings reduce the stacking tilt and misalignment and reduce equipment wear.

[0026] (2) By setting auxiliary components, including an auxiliary cylinder on the support plate, a push plate and a spring plate that are hinged to the auxiliary plate and limited by the baffle, when the metal pipe is offset and tilted, or the end is bitten and cannot be picked up by the transfer groove, the auxiliary cylinder drives the auxiliary plate to move, and the push plate squeezes the pipe to make the whole displacement, so that the frontmost pipe falls completely into the transfer groove, avoids deviating from the preset path, and ensures that the transfer block is lifted smoothly and the pipe is transferred, thus ensuring the stable operation of feeding and necking.

[0027] (3) By setting an adjustment component, including an adjustment cylinder installed on the top of the slide block, an adjustment block connected to the piston rod, and a U-shaped adjustment rod passing through the through groove, when the transfer block picks up the pipe, the slide block drives the adjustment component to move so that the adjustment rod is inserted into the pipe. The adjustment cylinder drives the adjustment rod to lift the pipe and slide it to one corner inside, and then it falls back to reset. This achieves the effect of ensuring that the angle of the pipe and the transfer groove are matched, ensuring the stability of the position during the transfer process, and ensuring the accurate angle when it is placed into the lower mold. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a necking device for producing metal pipe fittings according to the present invention.

[0029] Figure 2 for Figure 1 Another perspective structural diagram.

[0030] Figure 3 This is a schematic diagram of a partial rear view of the present invention.

[0031] Figure 4 This is a schematic diagram of the cooperative structure of the feeding component and auxiliary components in this invention.

[0032] Figure 5 for Figure 4 Another perspective structural diagram.

[0033] Figure 6 This is a schematic diagram of the mating structure of the necking component and the adjustment component in this invention.

[0034] Figure 7 for Figure 6 A partial structural diagram from another perspective.

[0035] Figure 8 This is a schematic diagram of the structure of the base and the feeding assembly in this invention.

[0036] Figure 9 This is a schematic diagram of the combined structure of the lower mold, transfer component, and feeding component in this invention.

[0037] Figure 10 This is a schematic diagram of the reloading component structure in this invention.

[0038] Explanation of reference numerals in the attached diagram: 1. Base;

[0039] 2. Narrowing assembly; 21. First guide rail; 22. Slide; 23. Drive cylinder; 24. Fixing plate; 25. Clamping mechanism;

[0040] 3. Positioning assembly; 31. Lifting cylinder; 32. Lower mold; 33. Gantry frame; 34. Adjustment mechanism; 341. First cylinder; 342. Connecting plate; 343. Second cylinder; 344. Upper mold;

[0041] 4. Feeding assembly; 41. Second guide rail; 42. Movable seat; 43. Trapezoidal frame; 44. Guide plate; 45. Limiting plate; 46. Movable block; 47. Protrusion;

[0042] 5. Auxiliary components; 51. Auxiliary cylinder; 52. Auxiliary plate; 53. Auxiliary rod; 54. Auxiliary pipe; 55. Bearing plate; 56. Push plate; 57. Baffle; 58. Spring plate;

[0043] 6. Adjustment assembly; 61. Adjustment cylinder; 62. Through groove; 63. Adjustment block; 64. Adjustment rod;

[0044] 7. Transfer assembly; 71. Base plate; 72. Hinge seat; 73. Rotating rod; 74. Motor; 75. Swing plate; 76. Transfer block; 77. Transfer groove. Detailed Implementation

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0047] Please see Figures 1-10 The present invention provides the following technical solutions:

[0048] Example 1, see Figure 1 A necking device for producing metal pipe fittings includes a base 1, on the top of which are two sets of necking assemblies 2. The two sets of necking assemblies 2 work together to perform necking operations on the metal pipe fittings. The specific structure of the necking assembly 2 is as follows:

[0049] See Figures 1-3 and Figure 6 Each constriction assembly 2 includes two first guide rails 21, with a slide block 22 slidably connected to the top of the two first guide rails 21. The slide block 22 slides on the top of the first guide rails 21. A drive cylinder 23 is installed on the top of the base 1 between the two first guide rails 21. The piston rod end of the drive cylinder 23 is connected to the corresponding slide block 22, and the drive cylinder 23 is used to drive the corresponding slide block 22 to move. That is, when the piston rod of the drive cylinder 23 extends, the corresponding slide block 22 moves along the extension direction of the first guide rail 21. A fixing plate 24 is installed on the top of each slide block 22, and a clamping mechanism 25 is installed on the opposite side of the two fixing plates 24. The two drive cylinders 23 are arranged opposite each other. When the drive cylinder 23 extends, the two slide blocks 22 move relative to each other. The metal pipe is brought closer, which in turn drives the corresponding fixed plate 24 and clamping mechanism 25 to move synchronously. When the metal pipe needs to be narrowed, only two sets of clamping mechanisms 25 are needed to clamp the two ends of the metal pipe and perform the narrowing operation. The clamping mechanism 25 is composed of a mold assembly, wherein the outer ring is a surrounding split mold and the inner ring is a positioning mold. The end of the metal pipe is fitted onto the outside of the inner ring positioning mold. Then, the outer ring shrinks, applying axial pressure and radial constraint force to the end of the metal pipe, causing the blank to undergo plastic deformation under the extrusion of the mold, gradually shrinking to form the required narrowed end. After the metal pipe is narrowed, the two drive cylinders 23 retract, causing the two sets of clamping mechanisms 25 to separate from each other, and the metal pipe can then be removed.

[0050] See Figure 1 and Figure 2A positioning component 3 is installed on the top of the base 1. Two sets of necking components 2 are located on the side of the positioning component 3 away from the feeding component 4 and are arranged symmetrically. The positioning component 3 is used to position and clamp the metal pipe, thereby facilitating the necking operation of the necking component 2. The specific structure of the positioning component 3 is as follows:

[0051] See Figures 2-3 The positioning component 3 includes a lifting cylinder 31 disposed on one side of the base 1. The piston rod end of the lifting cylinder 31 extends to the top of the base 1 and is connected to a lower mold 32. The lower mold 32 is used to place the metal pipe. That is, the height of the placement position is adjusted by the lifting cylinder 31. The two ends of the metal pipe are adjusted to the same height as the two sets of clamping mechanisms 25, and the narrowing operation is achieved by the cooperation of the two sets of clamping mechanisms 25.

[0052] See Figure 3 The positioning component 3 includes a gantry frame 33 mounted on the top of the base 1. An adjustment mechanism 34 is mounted on the top of the gantry frame 33. The adjustment mechanism 34 extends above the lower mold 32 and is used to press and position the metal pipe on the lower mold 32. The specific structure of the adjustment mechanism 34 is as follows:

[0053] See Figure 3 The adjusting mechanism 34 includes a first cylinder 341 horizontally mounted on the top of the gantry 33. A connecting plate 342 is mounted on the piston rod end of the first cylinder 341. A second cylinder 343 is vertically mounted downward on one side of the connecting plate 342. An upper mold 344 is mounted on the piston rod end of the second cylinder 343. The upper mold 344 is configured to cooperate with the lower mold 32. The first cylinder 341 is used to drive the connecting plate 342, the second cylinder 343 and the upper mold 344 to move horizontally synchronously, causing the upper mold 344 to move above the lower mold 32. After the metal pipe is placed on the lower mold 32, the second cylinder 343 drives the upper mold 344 to move downward. The upper mold 344 and the lower mold 32 cooperate to position the metal pipe. Then, the two sets of clamping mechanisms 25 cooperate to realize the shrinking operation. After the metal pipe is shrunk, the upper mold 344 and the lower mold 32 are separated, and then the shrunk metal pipe is removed by an external robot.

[0054] See Figure 1 , Figure 9 and Figure 10 The base 1 has a feeding assembly 4 and a transfer assembly 7 installed on its top. The feeding assembly 4 is used to feed the metal tubes, while the transfer assembly 7 removes the metal tubes from the feeding assembly 4 and transfers them to the lower mold 32, awaiting the next step of positioning and necking assembly. The specific structure of the feeding assembly 4 is as follows:

[0055] See Figures 2-4The feeding assembly 4 includes two trapezoidal frames 43. A guide plate 44 is installed on the top of the trapezoidal frame 43, and a limit plate 45 is provided above the guide plate 44. The trapezoidal frame 43 is used to support the guide plate 44. When the metal pipes are fed, they are arranged on the top of the guide plate 44, and the trapezoidal frame 43 is lower in the direction close to the positioning assembly 3. Therefore, the guide plate 44 and the limit plate 45 are in an inclined state. The arranged metal pipes slide down along the inclined direction of the guide plate 44. When the foremost metal pipe moves to the position of the guide plate 44 close to the positioning assembly 3, the transfer assembly 7 picks up and lifts the foremost metal pipe. The lifted metal pipe is sent to the top of the lower mold 32. Then, the lower mold 32 and the upper mold 344 cooperate to position the metal pipe, which facilitates the subsequent necking operation of the necking assembly 2.

[0056] See Figure 9 and Figure 10 The specific structure of component 7 is as follows:

[0057] The transfer assembly 7 is located between the feeding assembly 4 and the lower mold 32. The transfer assembly 7 includes a base plate 71 mounted on the top of the base 1 and two hinge seats 72 mounted on the top of the base plate 71. A rotating rod 73 is rotatably connected between the two hinge seats 72. A motor 74 is mounted on one side of one of the hinge seats 72. The output end of the motor 74 is connected to one end of the rotating rod 73. Two swing plates 75 are connected to the outer wall of the rotating rod 73. A transfer block 76 is connected to the end of the two swing plates 75 away from the rotating rod 73. A transfer groove 77 is opened on the side of the transfer block 76 away from the swing plate 75.

[0058] The shape of the transfer groove 77 matches the shape of the metal pipe, ensuring that the transfer block 76 can lift the metal pipe. When the motor 74 starts, the drive rod 73 rotates between the two hinge seats 72, thereby driving the two swing plates 75 to reciprocate around the rod 73. This swinging motion allows the transfer block 76 to switch positions between the guide plate 44 and the lower mold 32, so that the transfer block 76 can pick up the metal pipe on the guide plate 44 and transfer it to the position of the lower mold 32 to wait for positioning and shrinking.

[0059] Specifically, the motor 74 drives the rotating rod 73 to rotate, causing the swing plate 75 and the transfer block 76 to swing. The transfer block 76 squeezes the metal tube at the frontmost top of the guide plate 44, causing the metal tube to be squeezed back a certain distance. When the transfer block 76 moves below the guide plate 44, the metal tube slides back to the frontmost position. Then the swing plate 75 swings in the opposite direction, causing the transfer block 76 to lift the frontmost metal tube. The metal tube falls into the transfer groove 77. Then the transfer block 76 transfers the metal tube to the position above the lower mold 32. Then the lower mold 32 moves up to lift the metal tube on the transfer block 76. Then the transfer block 76 is reset by the swing plate 75 and picks up the next metal tube on the guide plate 44. The metal tube lifted by the lower mold 32 is clamped by the upper mold 344. Then the necking component 2 is used to perform necking operation. After the metal tube is necked, it is removed by the external robot arm. The positioning component 3 is reset and waits for the placement, positioning and necking of the next metal tube.

[0060] In Example 2, when feeding square tubes during the narrowing process, the stacking method can easily cause the guide components to jam. Due to the rectangular cross-section and angular characteristics and deformation of the square tubes, when the square tubes enter the guide channel, they may experience rigid collisions due to space constraints. When the deformation position of the end is inside the channel, it is easy to get stuck in the guide channel, which can lead to congestion. Furthermore, the unstable stacking posture can cause tilting and misalignment, which not only leads to machine downtime but also wears down and reduces the processing accuracy.

[0061] Therefore, refer to Figure 4 , Figure 5 and Figure 9 The guide plate 44 uses the trapezoidal frame 43 as a base support. Each limiting plate 45 has a moving block 46 connected to its top. The moving block 46 has a protrusion 47 connected to its top. The protrusion 47 is connected to the bottom of the gantry frame 33. With this setting, the guide plate 44 and the limiting plate 45 are set to a separated state.

[0062] See Figure 4 , Figure 5 and Figure 9The feeding assembly 4 also includes two sets of second guide rails 41 installed on the top of the base 1. Two movable seats 42 slide on the top of the two sets of second guide rails 41. Two trapezoidal frames 43 are correspondingly arranged with the two movable seats 42. A trapezoidal frame 43 is installed on the top of each movable seat 42. Through this arrangement, the distance between the two guide plates 44 can be adjusted to accommodate the placement of metal pipes of different lengths. Since the guide plates 44 and the limiting plates 45 are set to a separate state, the two ends of the metal pipes can extend to the opposite side of the two guide plates 44. In this state, the limiting plates 45 and the guide plates 44 cooperate to not only guide and arrange the metal pipes, but also to ensure that the deformation positions of the two ends of the metal pipes are staggered from the guide plates 44, so that the deformation positions of the ends of the metal pipes will not be stuck, thus preventing congestion and the need to stop the machine.

[0063] Specifically, firstly, the two trapezoidal frames 43 are moved, causing the trapezoidal frames 43 to drive the moving seat 42 to slide on the top of the second guide rail 41, thereby adjusting the distance between the two trapezoidal frames 43 to accommodate the production of metal pipes of different lengths. The metal pipes to be produced are placed on the top of the two guide plates 44, and multiple metal pipes are arranged along the guide plates 44. The multiple metal pipes are guided and conveyed between the guide plates 44 and the limiting plate 45. Both ends of the metal pipes extend and pass through the opposite sides of the two guide plates 44. The deformation positions of the two ends of the metal pipes can be staggered from the guide plates 44. Multiple metal pipes are continuously fed. Then, the metal pipe at the front of the feeding assembly 4 is obtained by the transfer assembly 7. The position of the obtained metal pipe is adjusted by the adjustment assembly 6. After that, the transfer assembly 7 transfers the metal pipe to the position of the positioning assembly 3 to wait for the pipe shrinking operation.

[0064] In Example 3, since the metal pipes will come into contact with each other, when there is deformation or burrs at the end of the metal pipes, the ends of adjacent metal pipes will interlock when they are arranged. The shape of the stacked metal pipes is irregular. When the foremost metal pipe falls into the transfer groove 77 on the transfer block 76, it is easy for one end to fall while the other end is still interlocked with the end of the adjacent metal pipe and falls, thus deviating from the preset feeding path. When the transfer block 76 transfers the metal pipe, the metal pipe cannot be lifted.

[0065] For this purpose, please refer to Figure 4 and Figure 5 An auxiliary component 5 is installed on the top of the feeding assembly 4. The auxiliary component 5 is used to adjust the position of the metal pipes arranged on the guide plate 44. The specific structure of the auxiliary component 5 is as follows:

[0066] See Figure 4 and Figure 5The auxiliary component 5 includes a support plate 55 mounted on the top of two limiting plates 45. An auxiliary cylinder 51 is mounted on the top of the support plate 55. The piston rod of the auxiliary cylinder 51 faces away from the gantry 33 and is connected to an auxiliary plate 52. Two auxiliary rods 53 are symmetrically connected to the side of the auxiliary plate 52 near the auxiliary cylinder 51. Two auxiliary tubes 54 are symmetrically connected to the top of the support plate 55. The two auxiliary tubes 54 are correspondingly arranged with the two auxiliary rods 53. The auxiliary rods 53 pass through the interior of the corresponding auxiliary tubes 54. The auxiliary cylinder 51 is used to drive the auxiliary plate 52 to move, thereby adjusting the position of the auxiliary plate 52. During the movement, the auxiliary plate 52 pulls the auxiliary rods 53 to move. The auxiliary rods 53 can slide inside the auxiliary tubes 54. The auxiliary rods 53 and the auxiliary tubes 54 cooperate to play an auxiliary guiding role.

[0067] See Figure 4 and Figure 5 A push plate 56 is hinged to the bottom of the auxiliary plate 52. A baffle 57 is installed on the side of the auxiliary plate 52 away from the auxiliary cylinder 51. The side wall of the baffle 57 is in contact with the side wall of the push plate 56. Two spring plates 58 are connected between the side walls of the auxiliary plate 52 and the push plate 56. The baffle 57 is used to limit the push plate 56, so that the push plate 56 can only swing in the direction of the auxiliary cylinder 51. During the swing, the spring plates 58 will be bent. The push plate 56 can be restored to the state of contact with the baffle 57 by the deformation of the spring plates 58.

[0068] Specifically, when the metal tube is placed on top of the guide plate 44, it squeezes the push plate 56, causing the push plate 56 to swing and the spring plate 58 to bend simultaneously. After the metal tube is placed, the push plate 56 returns to its original position, and then the metal tube slides on top of the guide plate 44. If the metal tube deviates or tilts and cannot be picked up by the transfer groove 77, the auxiliary cylinder 51 starts to retract, and the piston rod pulls the auxiliary plate 52 toward the metal tube. The auxiliary plate 52 drives the auxiliary rod 53 to slide inside the auxiliary tube 54, thereby allowing the auxiliary plate 52 to smoothly approach the metal tube. At the same time, the push plate 56... When the synchronous displacement contacts the metal pipe, the angle of the push plate 56 is limited by the baffle 57. If the push plate 56 continues to move, it will squeeze the metal pipe, and the entire arrangement of metal pipes will be pushed, so that the metal pipe at the front end can fall completely into the interior of the transfer groove 77. This setting achieves the effect of ensuring that the metal pipe at the front end falls completely into the transfer groove 77, avoiding deviating from the preset path, and ensuring that the transfer block 76 can be lifted and transferred smoothly, thus ensuring the stable progress of feeding and shrinking operations. At this time, the auxiliary component 5 is reset, and the transfer groove 77 lifts and transfers the metal pipe to the positioning component 3 for shrinking operations.

[0069] See Figure 6 and Figure 7Furthermore, to ensure the positional stability of the metal fitting during the transfer process by the transfer block 76 and the accuracy of the angle when the metal fitting is placed in the lower mold 32, adjustment components 6 are installed on the top of both sets of constriction assemblies 2. The adjustment components 6 are used to perform auxiliary position adjustment of the metal fitting on the transfer block 76. The specific structure of the adjustment components 6 is as follows:

[0070] See Figure 6 and Figure 7 Both sets of adjustment components 6 include adjustment cylinders 61, which are installed on the top of the corresponding slide block 22. The piston rod end of the slide block 22 is connected to an adjustment block 63. A through groove 62 is provided on one side of the fixing plate 24. The adjustment block 63 is slidably connected to the inside of the corresponding through groove 62. An adjustment rod 64 is connected to one side of the adjustment block 63. The adjustment rod 64 has a U-shaped structure, and both ends of the adjustment rod 64 are connected to horizontal extension sections. One of the horizontal extension sections is connected to one side of the corresponding adjustment block 63.

[0071] When the transfer block 76 acquires the metal tube, it swings to a vertical position. The two drive cylinders 23 are activated and push the corresponding slide blocks 22 to move, causing the two slide blocks 22 to move closer to each other. This causes the fixing plate 24 to push the adjustment assembly 6 to move as a whole, and the adjustment rod 64 is inserted into the interior of the metal tube. Then, the adjustment cylinder 61 pushes the adjustment block 63 and the adjustment rod 64 upward, causing the adjustment rod 64 to lift the metal tube. During the lifting process, the adjustment rod 64 slides to one corner position inside the metal tube. In this state, the position of the metal tube matches the angle of the transfer groove 77. Then, the adjustment cylinder 61 retracts, and the adjustment rod 64 and the metal tube fall down. The metal tube falls into the interior of the transfer groove 77. Then, the shrinking assembly 2 resets, and the adjustment rod 64 is pulled out from inside the metal tube. After the adjustment is completed, the transfer block 76 continues to swing, transferring the metal tube to the position above the lower mold 32 to wait for the tube shrinking operation.

[0072] Example 4: A method for reducing the diameter of metal pipe fittings during production, using a reducing device for metal pipe fittings as described above, includes the following steps:

[0073] S1. The metal pipe fittings to be produced are placed inside the feeding assembly 4 for guiding and conveying, so that multiple metal pipe fittings are continuously fed.

[0074] The more specific steps in S1 are as follows:

[0075] S11. First, push the two trapezoidal frames 43 to move, causing the trapezoidal frames 43 to drive the moving seat 42 to slide on the top of the second guide rail 41, thereby adjusting the distance between the two trapezoidal frames 43 to adapt to the production of metal pipes of different lengths.

[0076] S12. Place the metal pipes to be produced on the top of the two guide plates 44. Multiple metal pipes are arranged along the guide plates 44 and are guided and conveyed between the guide plates 44 and the limiting plate 45. Both ends of the metal pipes extend and pass through the opposite sides of the two guide plates 44, so that multiple metal pipes are continuously fed.

[0077] S2. Subsequently, the metal pipe at the front of the feeding component 4 is obtained by the transfer component 7, the position of the obtained metal pipe is adjusted by the adjustment component 6, and then the transfer component 7 transfers the metal pipe to the position of the positioning component 3 to wait for the pipe shrinking operation.

[0078] The more specific steps of S2 are as follows:

[0079] S21. Subsequently, the motor 74 drives the rotating rod 73 to rotate, causing the swing plate 75 and the transfer block 76 to swing. The transfer block 76 squeezes the metal tube at the frontmost position on the top of the guide plate 44, causing the metal tube to be squeezed back a certain distance. When the transfer block 76 moves below the guide plate 44, the metal tube slides back to the frontmost position. Then the swing plate 75 swings in the opposite direction, causing the transfer block 76 to lift the frontmost metal tube, and the metal tube falls into the transfer groove 77.

[0080] S22. Then, the transfer block 76 swings to a vertical position, the two drive cylinders 23 start and push the corresponding slide block 22 to move, causing the two slide blocks 22 to move closer to each other, causing the fixing plate 24 to push the adjustment assembly 6 to move as a whole, and the adjustment rod 64 is inserted into the interior of the metal pipe. Then, the adjustment cylinder 61 pushes the adjustment block 63 and the adjustment rod 64 to move upward, causing the adjustment rod 64 to lift the metal pipe. During the lifting process, the adjustment rod 64 slides to one corner position inside the metal pipe. In this state, the position of the metal pipe matches the angle of the transfer groove 77. Then, the adjustment cylinder 61 retracts, the adjustment rod 64 and the metal pipe fall down, and the metal pipe falls into the interior of the transfer groove 77. Then, the narrowing assembly 2 resets, and the adjustment rod 64 is pulled out from the interior of the metal pipe.

[0081] S23. After the adjustment is completed, the transfer block 76 continues to swing, transferring the metal pipe to the position above the lower mold 32 to wait for the pipe shrinking operation.

[0082] S3. Then, the positioning component 3 lifts and clamps the metal pipe, and the transfer component 7 resets and acquires the next metal pipe.

[0083] The more specific steps for S3 are as follows:

[0084] S31. Next, the lifting cylinder 31 pushes the lower mold 32 upward, lifting the metal pipe and moving it away from the transfer groove 77. Then, the transfer assembly 7 resets and picks up the next metal pipe. Simultaneously, the first cylinder 341 pushes the connecting plate 342, the second cylinder 343, and the upper mold 344 to move. Then, the upper mold 344 moves directly above the lower mold 32. The second cylinder 343 pushes the upper mold 344 downward, at which point the lower mold 32 and the upper mold 344 cooperate to clamp the metal pipe.

[0085] S4. Then, the necking component 2 necks both ends of the clamped metal pipe. After the necking is completed, the necked metal pipe is unloaded by the external robotic arm, the positioning component 3 is reset, and then the transfer component 7 can be used to load the pipe again.

[0086] The more specific steps for S4 are as follows:

[0087] S41. Subsequently, the two drive cylinders 23 are started and push the corresponding slides 22 to move, causing the two slides 22 to move closer to each other, causing the fixed plate 24 to push the clamping mechanism 25 to move as a whole, causing the two sets of clamping mechanisms 25 to fit over the two ends of the metal pipe and reduce the opening.

[0088] S42. After the shrinking is completed, the shrunken metal pipe is unloaded by an external robotic arm, the positioning component 3 is reset, and then the material is loaded again by the transfer component 7.

[0089] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

Claims

1. A necking device for producing metal pipe fittings, characterized in that: It includes a base (1), a positioning component (3) installed on the top of the base (1), a feeding component (4), a transfer component (7) and two sets of narrowing components (2). The top of the two sets of narrowing components (2) is equipped with an adjustment component (6). The metal pipe at the front of the feeding component (4) is obtained by the transfer component (7), and the position of the obtained metal pipe is adjusted by the adjustment component (6). The feeding component (4) and the transfer component (7) are both located on one side of the positioning component (3). The top of the feeding component (4) is equipped with an auxiliary component (5). The positioning component (3) includes a gantry (33) mounted on top of the base (1). The auxiliary component (5) includes a support plate (55) installed on the top of two limiting plates (45). An auxiliary cylinder (51) is installed on the top of the support plate (55). The piston rod of the auxiliary cylinder (51) faces away from the gantry (33) and is connected to an auxiliary plate (52). Two auxiliary rods (53) are symmetrically connected on the side of the auxiliary plate (52) near the auxiliary cylinder (51). Two auxiliary tubes (54) are symmetrically connected on the top of the support plate (55). The two auxiliary tubes (54) are correspondingly arranged with the two auxiliary rods (53). The auxiliary rods (53) pass through the interior of the corresponding auxiliary tubes (54). A push plate (56) is hinged to the bottom of the auxiliary plate (52). A baffle (57) is installed on the side of the auxiliary plate (52) away from the auxiliary cylinder (51). The side wall of the baffle (57) is in contact with the side wall of the push plate (56). Two spring plates (58) are connected between the side walls of the auxiliary plate (52) and the push plate (56). The feeding assembly (4) includes two sets of second guide rails (41) installed on the top of the base (1). Two movable seats (42) slide on the top of the two sets of second guide rails (41). A trapezoidal frame (43) is installed on the top of each movable seat (42). A guide plate (44) is installed on the top of the trapezoidal frame (43). A limit plate (45) is provided above the guide plate (44). A movable block (46) is connected to the top of each limit plate (45). A protrusion (47) is connected to the top of the movable block (46). The protrusion (47) is connected to the bottom of the gantry frame (33).

2. The necking device for metal pipe production according to claim 1, characterized in that: Both sets of the necking components (2) are located on the side of the gantry frame (33) away from the feeding component (4) and are symmetrically arranged. Each set of the necking components (2) includes two first guide rails (21). The top of the two first guide rails (21) is slidably connected to a slide block (22). A drive cylinder (23) is installed on the top of the base (1) and between the two first guide rails (21). The piston rod end of the drive cylinder (23) is connected to the corresponding slide block (22). A fixing plate (24) is installed on the top of each slide block (22). A clamping mechanism (25) is installed on the opposite side of the two fixing plates (24).

3. The necking device for metal pipe production according to claim 1, characterized in that: The positioning component (3) also includes a lifting cylinder (31) disposed on one side of the base (1). The piston rod end of the lifting cylinder (31) extends to the top of the base (1) and is connected to the lower mold (32). An adjustment mechanism (34) is installed on the top of the gantry (33), and the adjustment mechanism (34) extends to the top of the lower mold (32).

4. A necking device for producing metal pipe fittings according to claim 3, characterized in that: The adjustment mechanism (34) includes a first cylinder (341) horizontally installed on the top of the gantry (33). A connecting plate (342) is installed at the end of the piston rod of the first cylinder (341). A second cylinder (343) is vertically installed downward on one side of the connecting plate (342). An upper mold (344) is installed at the end of the piston rod of the second cylinder (343). The upper mold (344) is configured to cooperate with the lower mold (32).

5. A necking device for producing metal pipe fittings according to claim 2, characterized in that: Both sets of adjustment components (6) include adjustment cylinders (61), which are installed on the top of the corresponding slide (22). The piston rod end of the slide (22) is connected to an adjustment block (63). A through groove (62) is provided on one side of the fixing plate (24). The adjustment block (63) is slidably connected to the inside of the corresponding through groove (62). An adjustment rod (64) is connected to one side of the adjustment block (63).

6. A necking device for producing metal pipe fittings according to claim 5, characterized in that: The adjusting rod (64) has a U-shaped structure, and both ends of the adjusting rod (64) are connected to horizontal extension sections, one of which is connected to one side of the corresponding adjusting block (63).

7. A necking device for producing metal pipe fittings according to claim 3, characterized in that: The transfer assembly (7) is located between the feeding assembly (4) and the lower mold (32). The transfer assembly (7) includes a base plate (71) installed on the top of the base (1) and two hinge seats (72) installed on the top of the base plate (71). A rotating rod (73) is rotatably connected between the two hinge seats (72). A motor (74) is installed on one side of one of the hinge seats (72). The output end of the motor (74) is connected to one end of the rotating rod (73). Two swing plates (75) are connected to the outer wall of the rotating rod (73). A transfer block (76) is connected to the end of the two swing plates (75) away from the rotating rod (73). A transfer groove (77) is opened on the side of the transfer block (76) away from the swing plate (75).

8. A method for reducing the diameter of metal pipe fittings during production, using a reducing device for metal pipe fittings as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Place the metal pipe fittings to be produced inside the feeding assembly (4) for guiding and conveying, so that multiple metal pipe fittings are continuously fed. S2. Subsequently, the metal pipe at the front of the feeding component (4) is obtained by the transfer component (7), the position of the obtained metal pipe is adjusted by the adjustment component (6), and then the transfer component (7) transfers the metal pipe to the position of the positioning component (3) to wait for the pipe shrinking operation. S3. After that, the positioning component (3) lifts and clamps the metal pipe, and the transfer component (7) resets and acquires the next metal pipe. S4. Then the shrinking component (2) shrinks the ends of the clamped metal pipe. After the shrinking is completed, the shrinking metal pipe is unloaded by the external robot arm, the positioning component (3) is reset, and then the transfer component (7) is used to load the pipe again.

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