A die for forming the end of a mushroom head of a metal pipe fitting

Abstract

The utility model provides a kind of mould for metal pipe fitting mushroom head end forming. Including: horn mouth clamping mould component;Mushroom head clamping mould component, the mushroom head clamping mould component is set in one end of the horn mouth clamping mould component;First punch, the first punch is set in one end of the mushroom head clamping mould component;Second punch, the second punch is set in one end of the first punch.The utility model provides a kind of mould for metal pipe fitting mushroom head end forming, by horn mouth clamping mould component, mushroom head clamping mould component, first punch and second punch mutually cooperate, when using, horn mouth clamping mould component and mushroom head clamping mould component fixedly connected as a whole, when closing, can synchronous radial steady clamping to pipe fitting, avoid pipe fitting deviation in the process of stamping, improve forming consistency, ensure that the deviation of batch production's mushroom head is smaller in diameter, height, radian key dimension.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical engineering, in particular to a die for forming a mushroom-head end of a metal pipe fitting. Background Art

[0002] The "mushroom-head" structure at the end of a metal pipe fitting is a key configuration for realizing rapid butt joint, sealing and leakage prevention between the pipe fitting and a joint, and is widely applied in fields such as automotive brake systems, fuel pipelines, and hydraulic equipment. Its enlarged end can form a mechanical engagement with a matched joint, and cooperate with a sealing ring to achieve double sealing so as to avoid medium leakage.

[0003] Most of the existing mushroom-head forming processes for metal pipe fittings adopt the mode of "step-by-step die + manual assistance", that is, one set of die is used to pre-press the end of the pipe fitting into a flared shape, then another set of die is replaced to stamp the flared end into a mushroom head, and the pipe fitting needs to be manually transferred and the die alignment needs to be adjusted in the middle. This process has many defects: first, the forming consistency is poor, the pipe fitting is prone to position deviation during manual transfer, and the alignment accuracy of the two sets of dies is difficult to guarantee, resulting in large deviations in key dimensions such as diameter, height and radian of the mushroom heads produced in batches; second, the process flow is cumbersome, the step-by-step operation requires starting and stopping the equipment and replacing the dies for many times, which is difficult to adapt to the high-takt and mass production demands of the automobile manufacturing industry; third, the die change efficiency is low, when it is necessary to produce pipe fittings of different specifications (such as different pipe diameters and mushroom head dimensions), the two sets of dies need to be disassembled respectively and re-calibrated, which seriously affects the flexibility of the production line; fourth, the die has a short service life and poor automation adaptability, the stamping force of the step-by-step die is concentrated on the local cutting edge, which is prone to fatigue cracks; meanwhile, the manual assistance link cannot be seamlessly connected with the automatic production line, requiring additional operators and increasing labor costs.

[0004] Therefore, it is necessary to provide a die for forming a mushroom-head end of a metal pipe fitting to solve the above technical problems. Contents of the Utility Model

[0005] The utility model provides a die for forming a mushroom-head end of a metal pipe fitting, which solves the problems that the existing step-by-step die requires manual transfer of pipe fittings and die replacement, resulting in poor forming consistency, low efficiency, cumbersome die change, and difficulty in adapting to automatic production lines.

[0006] To solve the above technical problems, the die for forming a mushroom-head end of a metal pipe fitting provided by the utility model comprises:

[0007] a flared clamping die assembly;

[0008] a mushroom-head clamping die assembly, wherein the mushroom-head clamping die assembly is arranged at one end of the flared clamping die assembly;

[0009] a first punch, wherein the first punch is arranged at one end of the mushroom-head clamping die assembly;

[0010] The second punch is disposed at one end of the first punch.

[0011] Preferably, the flared mouth clamping mold assembly includes a left flared mouth clamping mold and a right flared mouth clamping mold, which are arranged opposite to each other.

[0012] Preferably, the mushroom head clamping mold assembly includes a left mushroom head clamping mold and a right mushroom head clamping mold, which are arranged opposite to each other.

[0013] Preferably, the left and right mushroom head clamping molds are fixedly installed at one end of the left and right flared mouth clamping molds, respectively.

[0014] Preferably, the flared mouth clamping mold assembly further includes a first through hole, which is opened on the opposite side of the left and right flared mouth clamping molds. The mushroom head clamping mold assembly further includes a second through hole, which is opened on the opposite side of the left and right mushroom head clamping molds.

[0015] Preferably, a limiting component is provided between the left clamping mold of the flared mouth and the right clamping mold of the flared mouth.

[0016] Preferably, the limiting component includes a limiting hole and a limiting pin, the limiting pin and the limiting hole are adapted to each other, the limiting hole is opened on the side of the left clamping mold of the flared mouth, and the limiting pin is fixedly installed on the side of the right clamping mold of the flared mouth.

[0017] Compared with related technologies, the mold for forming the mushroom head end of metal pipe fittings provided by this utility model has the following beneficial effects:

[0018] This utility model provides a mold for forming the mushroom-shaped end of metal pipe fittings. The mold consists of a flared mouth clamping assembly, a mushroom head clamping assembly, a first punch, and a second punch. During use, the flared mouth clamping assembly and the mushroom head clamping assembly are fixedly connected as a single unit. When closed, they simultaneously and radially clamp the pipe fitting, preventing displacement during stamping, improving forming consistency, and ensuring minimal deviation in key dimensions such as diameter, height, and curvature of the mushroom heads produced in batches. The overall mold structure is compact and can be directly integrated into automated production lines. With the aid of robotic arms for feeding and unloading, no additional operators are required, reducing labor costs. Furthermore, when changing molds of different specifications, only the integrated clamping assembly needs to be disassembled and reassembled, eliminating the need for separate calibration of two sets of molds, significantly improving changeover efficiency. This fully meets the high-paced, high-volume production needs of industries such as automotive manufacturing. Simultaneously, the integrated stamping force is more uniform, reducing localized edge fatigue damage and extending the mold's service life. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a first embodiment of a mold for forming the mushroom head end of a metal pipe fitting provided by this utility model;

[0020] Figure 2 for Figure 1 The diagram shows the structure of the flared mouth clamping mold assembly and the mushroom head clamping mold assembly;

[0021] Figure 3 for Figure 2 The diagram shows the right clamping structure of the mushroom head.

[0022] Figure 4 This is a schematic diagram of the second embodiment of a mold for forming the mushroom head end of a metal pipe fitting, provided by this utility model.

[0023] The following are the labels in the diagram: 1. Trumpet mouth clamping mold assembly, 11. Trumpet mouth left clamping mold, 12. Trumpet mouth right clamping mold, 13. First through hole, 2. Mushroom head clamping mold assembly, 21. Mushroom head left clamping mold, 22. Mushroom head right clamping mold, 23. Second through hole, 3. First punch, 4. Second punch, 5. Limiting assembly, 51. Limiting hole, 52. Limiting pin. Detailed Implementation

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

[0025] First Embodiment

[0026] Please refer to the following: Figure 1 , Figure 2 , Figure 3 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of a mold for forming the mushroom head end of a metal pipe fitting provided by this utility model; Figure 2 for Figure 1 The diagram shows the structure of the flared mouth clamping mold assembly and the mushroom head clamping mold assembly; Figure 3 for Figure 2 The diagram shows the right clamping structure of the mushroom head.

[0027] A mold for forming the mushroom-shaped end of a metal pipe fitting includes: a flared mouth clamping mold assembly 1;

[0028] Mushroom head clamping mold assembly 2, wherein the mushroom head clamping mold assembly 2 is disposed at one end of the flared mouth clamping mold assembly 1;

[0029] The first punch 3 is disposed at one end of the mushroom head clamping mold assembly 2;

[0030] The second punch 4 is disposed at one end of the first punch 3.

[0031] The horn-mouth clamping mold assembly 1 includes a left horn-mouth clamping mold 11 and a right horn-mouth clamping mold 12, which are arranged opposite to each other.

[0032] The mushroom head clamping mold assembly 2 includes a left mushroom head clamping mold 21 and a right mushroom head clamping mold 22, which are arranged opposite to each other.

[0033] The left mold 21 and the right mold 22 of the mushroom head are respectively fixedly installed at one end of the left mold 11 and the right mold 12 of the flared mouth.

[0034] The horn-shaped clamping mold assembly 1 further includes a first through hole 13, which is opened on the opposite side of the left horn-shaped clamping mold 11 and the right horn-shaped clamping mold 12. The mushroom-shaped clamping mold assembly 2 further includes a second through hole 23, which is opened on the opposite side of the left mushroom-shaped clamping mold 21 and the right mushroom-shaped clamping mold 22.

[0035] First punch 3 (e.g., JGS-PB04-0624, JGS-PB05-0624): Used to complete the first initial forming of the end, optimizing the basic contours such as R-angle and flare.

[0036] Second punch 4 (e.g., JGS-PB06-0624, JGS-PB07-0624): Further refine the end dimensions to ensure the quality of the root R angle and end face, and meet the final shape requirements;

[0037] The flared mouth clamping mold assembly 1 and the mushroom head clamping mold assembly 2: radially clamp the pipe fittings to prevent displacement and deformation of the pipe body during the stamping process. The clamping mold has a mirror polishing and precision fit structure.

[0038] The flared mouth clamping mold assembly 1 and the mushroom head clamping mold assembly 2 are made of high-toughness tool steel such as SKD11 and heat-treated to HRC60-62 to extend their service life.

[0039] The working principle of the mold for forming the mushroom head end of metal pipe fittings provided by this utility model is as follows:

[0040] One end of the metal pipe to be processed (such as a steel pipe for an automotive braking system) is passed sequentially through the first through hole 13 of the flared mouth clamping mold assembly 1 (formed by the closure of the left flared mouth clamping mold 11 and the right clamping mold 12) and the second through hole 23 of the mushroom head clamping mold assembly 2 (formed by the closure of the left mushroom head clamping mold 21 and the right clamping mold 22). The end of the pipe extends out of the outside of the mushroom head clamping mold assembly 2. The clamping mold drive mechanism is activated, which drives the left flared mouth clamping mold 11 and the right clamping mold 12, and the left mushroom head clamping mold 21 and the right clamping mold 22 to close synchronously. The pipe is radially and stably clamped through the inner walls of the first through hole 13 and the second through hole 23 to prevent the pipe from shifting during stamping.

[0041] First, the first punch 3 is activated. The first punch 3 moves axially towards the end of the pipe fitting and punches the protruding end of the pipe fitting, pre-pressing it into a flared shape (laying the basic outline for mushroom head forming). After the first punch is reset, the second punch 4 follows and moves forward. Through the cavity at its end that is adapted to the shape of the mushroom head, it performs secondary punching and finishing on the flared mouth, so that the end of the pipe fitting is finally formed into a mushroom head structure that meets the size requirements (such as the diameter, height, and root R angle are accurately met).

[0042] After stamping is completed, the clamping die assembly opens simultaneously, and the formed metal tube is taken out, which can then enter the next processing cycle. The entire process does not require manual transfer of tubes or replacement of molds, achieving one-time clamping and two-step forming, which is suitable for the continuous feeding and unloading requirements of automated production lines.

[0043] Compared with related technologies, the mold for forming the mushroom head end of metal pipe fittings provided by this utility model has the following beneficial effects:

[0044] The flared mouth clamping die assembly 1, the mushroom head clamping die assembly 2, the first punch 3, and the second punch 4 work together. During use, the flared mouth clamping die assembly 1 and the mushroom head clamping die assembly 2 are fixedly connected as one unit. When closed, they can simultaneously and radially stabilize the tube, preventing the tube from shifting during stamping, improving the consistency of forming, and ensuring that the mushroom heads produced in batches have small deviations in key dimensions such as diameter, height, and curvature. The overall mold structure is compact and can be directly integrated into automated production lines. With the help of robotic arms for feeding and unloading, no additional operators are required, reducing labor costs. Moreover, when changing molds of different specifications, only the integrated clamping die assembly needs to be disassembled and assembled as a whole. There is no need to calibrate two sets of molds separately, which significantly improves the efficiency of mold changeover. It is fully adapted to the high-speed, high-volume production needs of industries such as automotive manufacturing. At the same time, the stamping force is more uniform under integrated working conditions, reducing localized edge fatigue damage and extending the service life of the mold.

[0045] Second Embodiment

[0046] Please refer to the following: Figure 4Based on the first embodiment of this application, which provides a mold for forming the mushroom-shaped end of a metal pipe fitting, the second embodiment of this application proposes another mold for forming the mushroom-shaped end of a metal pipe fitting. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0047] Specifically, the second embodiment of this application provides a mold for forming the mushroom head end of a metal pipe fitting, which differs in that a limiting component 5 is provided between the left clamping mold 11 and the right clamping mold 12 of the flared mouth.

[0048] The limiting component 5 includes a limiting hole 51 and a limiting pin 52. The limiting pin 52 and the limiting hole 51 are adapted to each other. The limiting hole 51 is opened on the side of the left clamping mold 11 of the horn mouth, and the limiting pin 52 is fixedly installed on the side of the right clamping mold 12 of the horn mouth.

[0049] The working principle of the mold for forming the mushroom head end of metal pipe fittings provided by this utility model is as follows:

[0050] During the closing process of the clamping assembly, the limiting pin 52 on the side of the right clamping mold 12 of the flared mouth is simultaneously inserted into the limiting hole 51 of the left clamping mold 11 of the flared mouth. Through the precise cooperation between the limiting pin 52 and the limiting hole 51, the coaxiality of the left clamping mold 11 and the right clamping mold 12 of the flared mouth, and the left clamping mold 21 and the right clamping mold 22 of the mushroom head are ensured when they are closed. This avoids the first through hole 13 and the second through hole 23 from being misaligned due to clamping mold misalignment, which could lead to stamping deformation or dimensional deviation of the pipe fitting.

[0051] Compared with related technologies, the mold for forming the mushroom head end of metal pipe fittings provided by this utility model has the following beneficial effects:

[0052] By setting the limiting component 5, the right clamping mold 12 and the left clamping mold 11 of the flared mouth are limited during use, the coaxiality of the clamping molds is controlled, the molding accuracy and consistency are further improved, and the mold can maintain stable performance during long-term high-frequency use. It is especially suitable for automotive pipeline production scenarios with strict accuracy requirements.

[0053] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A mold for forming the mushroom-shaped end of a metal pipe fitting, characterized in that, include: Flared mouth clamping mold assembly; A mushroom head clamping mold assembly, wherein the mushroom head clamping mold assembly is disposed at one end of the flared mouth clamping mold assembly; The first punch is disposed at one end of the mushroom head clamping mold assembly; The second punch is disposed at one end of the first punch. The flared mouth clamping die assembly includes a left flared mouth clamping die and a right flared mouth clamping die, which are disposed opposite to each other. A limiting component is disposed between the left flared mouth clamping die and the right flared mouth clamping die. The limiting component includes a limiting hole and a limiting pin, which are adapted to each other. The limiting hole is opened on the side of the left flared mouth clamping die, and the limiting pin is fixedly installed on the side of the right flared mouth clamping die.

2. The mold for forming the mushroom-shaped end of a metal pipe fitting according to claim 1, characterized in that, The mushroom head clamping mold assembly includes a left mushroom head clamping mold and a right mushroom head clamping mold, which are arranged opposite to each other.

3. The mold for forming the mushroom-shaped end of a metal pipe fitting according to claim 2, characterized in that, The left and right clamping molds of the mushroom head are respectively fixedly installed at one end of the left and right clamping molds of the flared mouth.

4. A mold for forming the mushroom-shaped end of a metal pipe fitting according to claim 3, characterized in that, The flared mouth clamping mold assembly further includes a first through hole, which is opened on the opposite side of the left and right flared mouth clamping molds. The mushroom head clamping mold assembly further includes a second through hole, which is opened on the opposite side of the left and right mushroom head clamping molds.

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