Three-way branch pipe forming bursting device

Abstract

The utility model provides a three-way branch pipe forming bursting device which comprises an upper die and a lower die, a placing channel penetrating through the left side and the right side is formed between the upper die and the lower die, the lower die is provided with a concave forming channel, and the forming channel is communicated with the placing channel. Side jacking rods are correspondingly arranged on the left side and the right side of the containing channel respectively, a lower jacking rod is correspondingly arranged on the lower side of the forming channel, the upper end of the lower jacking rod is connected with a cylindrical jacking head, and a plurality of long cutting edges are arranged on the upper side face of the jacking head in the X-axis direction and arranged in the Y-axis direction; the multiple cutting edges are arranged in a wave shape in the Y-axis direction. In the water expansion forming machining process of the three-way pipe, the cylindrical ejection head is used for bursting an arc-shaped bulge bulged at the end of the branch pipe, and the wavy cutting edge is arranged on the upper side face of the ejection head, so that compared with a plane-shaped ejection head, the contact area between the wavy cutting edge and the bulge is smaller, and the bulge can be quickly bursted. After the bumps are broken, the walls of the branch pipes can be extruded to the peripheral wall under the action of high pressure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tee pipe fitting processing, and specifically relates to a tee branch forming and breaking device. BACKGROUND

[0002] Tee pipe fittings are components that realize pipeline branching and confluence in fluid conveying systems. In various tee forming processes, the internal high-pressure water expansion forming technology has become the mainstream technical solution for medium and high-end tee pipe fitting production due to its high processing precision, dense product organization, and good surface quality.

[0003] In the prior art (such as patent authorized publication number CN 220862476 U), a typical tee pipe fitting water expansion forming device mainly consists of a mold closing mechanism, a pressure applying system, and a forming die. The forming die usually includes an upper die and a lower die that cooperate with each other. When the upper die and the lower die are closed, a pipeline placement channel is formed along the horizontal direction. The lower die has a concave expansion cavity at the position of the branch pipe forming. The expansion cavity is in communication with the pipeline placement channel, and together they form a complete forming space. In actual production, the straight pipe blank to be processed is placed in the channel. The side pressure cylinders on the left and right sides of the device move axially towards each other to realize axial feeding of the blank. At the same time, high-pressure liquid is continuously injected into the pipeline. Under the synergistic action of axial pressure and internal pressure, the pipeline wall material undergoes plastic deformation and fills into the expansion cavity to form a bulge, and finally a tee rough shape with a third branch pipe structure is formed.

[0004] However, the end cap of the third branch pipe formed by the bulge method forms a circular arc structure, rather than a flat end face required for subsequent assembly. The existence of this arc structure brings double trouble to subsequent processing: on the one hand, to ensure the flatness and dimensional accuracy of the end face of the cut branch pipe, the operator must avoid the arc area and perform excessive cutting, resulting in a large amount of unnecessary pipe material being cut off, significantly increasing the loss of raw materials. On the other hand, the irregularity of the arc surface makes it difficult for the cutting tool to accurately position and stably feed, not only reducing the cutting efficiency, but also easily causing processing defects such as cutting edge inclination and burr, increasing the workload of subsequent polishing and correction auxiliary processes, and further increasing the total production cost. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a tee branch forming and breaking device to solve the above technical problems.

[0006] The technical solution of the utility model is as follows:

[0007] A tee branch pipe forming and breaking device, comprising an upper die and a lower die, a placement channel is formed through the left and right sides between the upper die and the lower die, a lower concave forming channel is arranged on the lower die, and the forming channel is communicated with the placement channel; side pressing rods are arranged on the left and right sides of the placement channel respectively, a lower pressing rod is arranged on the lower side of the forming channel, the upper end of the lower pressing rod is connected with a cylindrical head, the upper side of the head is provided with a long blade in the X-axis direction, a plurality of blades are arranged in the Y-axis direction, and the blades are arranged in a wave shape in the Y-axis direction.

[0008] The head is coaxially arranged with the forming channel, and the diameter of the head is smaller than the diameter of the forming channel.

[0009] The lower side of the lower die is provided with a base, the base is provided with an installation channel penetrating through the upper and lower sides of the base, the lower pressing rod is adaptively connected with the installation channel, the upper side of the base is provided with an installation cavity adaptively connected with the head, and the installation cavity is coaxially arranged with the installation channel.

[0010] The diameter of the head is larger than the diameter of the lower pressing rod.

[0011] The placement channel is provided with two placement channels, and the two placement channels are arranged in the front and rear direction.

[0012] The beneficial effects of the tee branch pipe forming and breaking device are as follows:

[0013] In the water swelling forming process of the tee pipe, the cylindrical head is used to break the arc-shaped bulge at the end of the branch pipe, the upper side of the head is provided with a wave-shaped blade, compared with the planar head, the contact area of the wave-shaped blade with the bulge is smaller, which is helpful to quickly break the bulge. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0015] Figure 1 Structure of the present application Figure 1 .

[0016] Figure 2 Structure of the present application Figure 2 .

[0017] Figure 3 It is the structure schematic view of the plug of the utility model.

[0018] The label explanation in the drawing: upper die 1, lower die 2, placement channel 3, forming channel 4, side pressing rod 5, lower pressing rod 6, plug 7, cutting edge 8, base 9, installation channel 10, installation cavity 11. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] The following references Figures 1-3 The utility model is explained as follows:

[0021] Embodiment: the three-way branch pipe forming and breaking device of the application is a special forming equipment designed for the arc bulging defect of the branch pipe end cap in the traditional three-way pipe water swelling forming process, and the core function is to break the arc bulging of the branch pipe end in the three-way pipe water swelling forming process and to preliminarily form the branch pipe end face, so as to solve the material waste and low efficiency problem of subsequent cutting processing.

[0022] A three-way branch pipe forming and breaking device, comprising a die holder assembly, the die holder assembly comprises an upper die 1 and a lower die 2, and is part of pipe positioning and forming space constraint. The placement channel 3 is formed between the upper die 1 and the lower die 2, and the upper die 1 and the lower die 2 are matched forming dies, and the placement channel 3 is formed after the two are combined, which is along the left and right directions. The channel is used to accommodate the straight pipe blank to be processed.

[0023] The placement channel 3 is provided with two, and the two placement channels 3 are arranged in the front and rear direction. The structure can adapt to the demand of double pipe parallel processing.

[0024] The middle region of the lower die 2 is provided with a lower concave forming channel 4 penetrating the lower side, the axis of the channel is perpendicular to the axis of the placement channel 3, and the channel is in communication with the placement channel 3, and together forms the forming cavity of the three-way pipe branch pipe.

[0025] The left and right sides of the placement channel 3 are respectively provided with side pressing rods 5 that can move left and right, and the lower side of the forming channel 4 is provided with a lower pressing rod 6 that can move up and down.

[0026] The top pressing mechanism comprises side top pressing rods 5 and a lower top pressing rod 6, which are arranged along the axis direction of the placing channel 3 and the axis direction of the forming channel 4 respectively, and provide the required pressure for forming by axial movement. The side top pressing rods 5 are arranged on the left and right sides of the placing channel 3, and can move left and right along the axis direction of the placing channel 3. The side top pressing rods 5 have the same function as the side pressing cylinders of the traditional water swelling forming equipment, and are used to apply axial pressure to the straight pipe blank during the forming process, so as to realize axial material supplement of the pipe wall material and ensure that the pipe wall material can be fully filled into each area of the forming cavity.

[0027] The upper end of the lower top pressing rod 6 is connected with a cylindrical top head 7, and the upper side of the top head 7 is provided with a plurality of long blades 8 along the X-axis direction. The plurality of blades 8 are arranged along the Y-axis direction, and the plurality of blades 8 are arranged in a wave shape along the Y-axis direction. This structure design is the core technical feature that is different from the traditional flat top head.

[0028] The top head 7 is coaxially arranged with the forming channel 4, and the diameter of the top head 7 is smaller than the diameter of the forming channel 4. The gap design provides the necessary space for the deformation of the pipe material, and ensures that the broken pipe wall material can be smoothly attached to the peripheral wall of the forming channel 4.

[0029] The lower side of the lower mold 2 is provided with a base 9, and the lower mold 2 is fixedly connected with the base 9. The base 9 provides installation support for the entire device.

[0030] The base 9 is provided with an installation channel 10 (the installation channel 10 is used for assembling the lower top pressing rod 6) penetrating the upper and lower sides of the base 9, and the lower top pressing rod 6 is adaptively connected with the installation channel 10.

[0031] The upper side of the base 9 is provided with an installation cavity 11 adaptively connected with the top head 7, and the installation cavity 11 is coaxially arranged with the installation channel 10. The installation cavity 11 is used for accommodating the lower part of the top head 7, and realizing accurate positioning of the top head 7.

[0032] The diameter of the top head 7 is greater than the diameter of the lower top pressing rod 6. The step structure makes the lower part of the top head 7 embedded in the installation cavity 11 of the base 9, forming radial positioning, and avoiding deviation of the top head 7 during the top pressing process.

[0033] The lower top pressing rod 6 is assembled in the installation channel 10 of the base 9, and can move up and down along the axis direction of the installation channel 10, which is a power component for realizing the function of breaking the pipe bulge. The upper end of the lower top pressing rod 6 is fixedly connected with the top head 7, and the two are connected by integral machining or interference fit to ensure the connection strength and coaxiality.

[0034] First, the straight pipe blank to be processed is respectively placed into two placing passages 3 of the lower mold 2, and then the upper mold 1 is controlled to descend and combine with the lower mold 2, so that the radial positioning and fixing of the blank are realized. At this time, the side top pressing rod 5 moves along the left-right direction until the end thereof is attached to the two end faces of the straight pipe blank, and the axial positioning is completed; the lower top pressing rod 6 is in the initial low position.

[0035] The high-pressure liquid is injected into the straight pipe blank through the preset liquid injection channel, and at the same time, the side top pressing rod 5 slowly feeds along the axial direction to provide the axial material supplement pressure. Under the combined action of the internal high pressure and the axial pressure, the pipe wall of the straight pipe blank plastically deforms and gradually fills into the connected forming passage 4 to form the branch pipe rudiment. In this process, since the lower side of the forming passage 4 is not closed, the deformed pipe wall will form an upward convex arc-shaped bulge in the forming passage 4, and the form of the bulge is consistent with that of the traditional water swelling process, but the subsequent breaking treatment will be performed by the top head 7.

[0036] When the arc-shaped bulge of the branch pipe rudiment is formed to the preset size, the lower top pressing rod 6 is controlled to move upward along the axial line of the forming passage 4 to drive the top head 7 to move upward synchronously. The wavy-shaped blade 8 on the upper side of the top head 7 first contacts the lowest part of the arc-shaped bulge, and since the contact area of the wavy-shaped blade 8 is much smaller than that of the planar top head, the material strength limit of the bulge can be quickly broken to realize the accurate breaking of the bulge. After the bulge is broken, the lower top pressing rod 6 continues to move upward, the upper end face of the top head 7 is attached to the pipe wall of the branch pipe end, and at the same time, the high-pressure liquid in the blank continuously acts to push the pipe wall of the branch pipe to closely attach to the peripheral wall of the forming passage 4, and finally the branch pipe structure with flat end face and uniform wall thickness is formed.

[0037] Compared with the traditional water swelling forming equipment and the subsequent cutting process, the advantages of the technical scheme mainly lie in three aspects: first, the branch pipe forming and bulge breaking are integrated into one process through the structural design of the top head 7 and the blade 8, so that the subsequent cutting processing link is simpler and the production process complexity is reduced; second, the design of the wavy-shaped blade 8 improves the bulge breaking efficiency by reducing the contact area, and avoids the problems of bulge breaking difficulty or bulge deformation caused by the large contact area of the traditional top head.

[0038] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A three-way branch pipe forming and breaking device, comprising an upper mold and a lower mold, wherein a placement channel is formed between the upper mold and the lower mold, extending through the left and right sides; the lower mold is provided with a recessed forming channel, which communicates with the placement channel; side push rods are respectively provided on the left and right sides of the placement channel, and a lower push rod is provided on the lower side of the forming channel, characterized in that: The upper end of the lower top pressing rod is connected with a cylindrical top head, the upper side of the top head is provided with long-shaped cutting edges in the X-axis direction, the cutting edges are provided with a plurality of cutting edges arranged in the Y-axis direction; the plurality of cutting edges are arranged in a wave shape in the Y-axis direction.

2. A tee branch forming and piercing device according to claim 1, characterized in that: The top head is coaxially arranged with the forming channel, and the diameter of the top head is smaller than the diameter of the forming channel.

3. A tee branch forming and piercing device according to claim 1, wherein: The lower side of the lower mold is provided with a base, the base is provided with a mounting channel penetrating through the upper and lower sides thereof, the lower top pressing rod is adaptively connected with the mounting channel, the upper side of the base is provided with a mounting cavity adaptively connected with the top head, and the mounting cavity is coaxially arranged with the mounting channel.

4. A tee branch forming and piercing device according to claim 3, wherein: The diameter of the top head is greater than the diameter of the lower top pressing rod.

5. A tee branch forming and piercing device according to claim 1 wherein: The placing channels are provided with two, and the two placing channels are arranged in the front-rear direction.

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