Opening and closing die for forming high-pressure tee joint with lengthened branch pipe

Abstract

The invention relates to the technical field of tee joint forming, in particular to an opening and closing mold for forming a lengthened branch pipe high-pressure tee joint. The forming die further comprises an upper forming die, two sets of lower forming dies and a die drawing mechanism, the upper forming die is located above the two sets of lower forming dies, and the two sets of lower forming dies are installed on the outer frame in a sliding mode. A pipe blank is placed on two sets of lower shaping molds, the upper shaping mold and the two sets of lower shaping molds extrude the pipe blank into a circle, meanwhile, a large protruding structure is formed in the middle of the pipe blank, then the upper shaping mold ascends and resets, the two sets of lower shaping molds move oppositely, then the upper shaping mold descends, and therefore the pipe blank is formed. According to the three-way pipe forming die, two sets of lower forming dies are matched to conduct secondary extrusion on a pipe blank, a large protruding structure is pressed into a small protruding structure, a foundation structure of a three-way pipe is formed, then die drawing is conducted on the foundation structure of the three-way pipe, the three-way pipe is formed, and therefore the long branch pipe of the three-way pipe is guaranteed, meanwhile, the change of the wall thickness of the branch pipe is reduced, and the practicability of the die is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tee forming, in particular to an opening and closing die for forming a high-pressure tee of an extended branch pipe. Background Art

[0002] A tee is a pipe joint with three openings, which is widely used in pipe networks for conveying liquids and gases. During the processing, the tee is generally formed by die extrusion. Existing tee production dies include a die for drawing a tee blank disclosed in the utility model patent with announcement number CN202052782U and a tee forming die disclosed in the utility model patent with announcement number CN204724714U. Fig.10 As shown, during processing, the tube blank is placed in the mold, and the left and right parts of the tee are formed by extrusion. At the same time, since the middle part is not subjected to force, a convex structure is formed, and then the convex structure is shaped by the draft component to form a branch pipe, so that the tee is formed.

[0003] However, it was found during use that the existing tee forming mold structure is relatively simple, which is not convenient for producing tees with longer branches. In addition, when producing tees with long branches, it is easy to cause the wall thickness of the branch to become thinner, affecting the service life and resulting in poor practicality. Therefore, there is an urgent need for an opening and closing mold for forming a high-pressure tee with an extended branch to improve the above problems. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method for extruding a tube blank into an elliptical shape by an extrusion mechanism, and then installing an upper shaping die on a hydraulic device, and then placing the tube blank on two groups of lower shaping dies, and driving the upper shaping die to move downward by a hydraulic mechanism, so that the upper shaping die and the two groups of lower shaping dies extrude the tube blank into a circle again, and at the same time form a large convex structure in the middle of the tube blank, and then the upper shaping die rises and resets, and the two groups of lower shaping dies move toward each other, and then the upper shaping die is lowered, and the two groups of lower shaping dies are cooperated to perform secondary extrusion on the tube blank, and the large convex structure is pressed into a small convex structure to form the basic structure of a three-way pipe, and then the bottom of the convex structure is cut off, and then a demolding mechanism is used to cooperate with the two groups of lower shaping dies and the upper shaping die to demold the convex structure, so that the convex structure becomes a branch pipe of the three-way pipe, so that the three-way pipe is formed, thereby ensuring the long branch pipe of the three-way pipe, reducing the change of the wall thickness of the branch pipe, and improving the practicality of the mold, which is an opening and closing mold for high-pressure three-way forming with an extended branch pipe.

[0005] The invention discloses an opening and closing die for forming a high-pressure tee of an extended branch pipe, comprising an extrusion mechanism; an upper shaping die, two sets of lower shaping dies and a die-pulling mechanism, wherein the upper shaping die is located above the two sets of lower shaping dies, and the two sets of lower shaping dies are slidably mounted on an outer frame; The tube blank is extruded into an elliptical shape by an extrusion mechanism, and then the upper shaping die is installed on the hydraulic equipment, and then the tube blank is placed on two groups of lower shaping dies, and the upper shaping die is driven downward by the hydraulic mechanism, so that the upper shaping die and the two groups of lower shaping dies extrude the tube blank into a circle again, and at the same time a large convex structure is formed in the middle of the tube blank, and then the upper shaping die rises and resets, and the two groups of lower shaping dies move toward each other, and then the upper shaping die is lowered, and the tube blank is secondary extruded in cooperation with the two groups of lower shaping dies, and the large convex structure is pressed into a small convex structure to form the basic structure of the three-way pipe, and then the bottom of the convex structure is cut off, and then the drafting mechanism is used to cooperate with the two groups of lower shaping dies and the upper shaping die to draft the convex structure, so that the convex structure becomes a branch pipe of the three-way pipe, and the three-way pipe is formed, thereby ensuring the long branch pipe of the three-way pipe and reducing the change of the wall thickness of the branch pipe, thereby improving the practicality of the mold.

[0006] Preferably, the extrusion mechanism pairs an upper extrusion die and a lower extrusion die, and the lower extrusion die is located above the upper extrusion die; the lower extrusion die is installed on the hydraulic equipment, the tube blank is placed on the upper extrusion die, and the lower extrusion die is controlled to descend by the hydraulic equipment, so that the upper extrusion die and the lower extrusion die extrude the tube blank, so that the tube blank forms an elliptical structure, thereby improving the practicality of the mold.

[0007] Preferably, the middle parts of the two groups of lower shaping dies are both semicircular structures, so that when the upper shaping die and the two groups of lower shaping dies extrude the tube blank, a convex structure is formed in the middle part of the tube blank.

[0008] Preferably, the bottoms of the two groups of lower shaping dies are both open structures, which facilitates the discharge of debris falling from the tube blank when the convex structure of the tube blank is extruded, thereby improving the practicality of the mold.

[0009] Preferably, the corner position at the top of the semicircular structure of the lower shaping mold is in a smooth arc shape, which facilitates the molding of the convex structure of the tube blank, thereby improving the practicality of the mold.

[0010] Preferably, the demolding mechanism includes a pull rod and a demolding die, and the demolding die is mounted on the pull rod; the demolding die is placed in the raised structure of the tube blank, and by pulling the pull rod downward, the demolding die cooperates with two sets of lower forming dies to extrude the raised structure of the tube blank, so that the branch pipe of the tee pipe is formed, thereby improving the practicality of the mold.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. Through two separate sets of lower shaping dies, it is convenient to form a large convex structure on the tube blank. The upper shaping die rises and resets, and then the two sets of lower shaping dies move toward each other, and then the upper shaping die is lowered, and the tube blank is extruded for the second time with the two sets of lower shaping dies, and the large convex structure is pressed into a small convex structure to form the basic structure of the tee pipe. Then the convexity is demolded, which is convenient for the tee pipe to form a long branch pipe and reduce the change of the wall thickness of the long branch pipe of the tee pipe; 2. Simple structure, simple operation, and improved production convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the state structure of the upper extrusion die and the lower extrusion die of the present invention when in operation; Figure 2 It is a schematic diagram of the structure of the state when the upper extrusion die and the lower extrusion die of the present invention press the tube blank into an elliptical shape; Figure 3 It is a schematic diagram of the state structure of the upper shaping die and two groups of lower shaping dies of the present invention when extruding a tube blank; Figure 4 It is a schematic diagram of the state structure when the upper shaping die and two sets of lower shaping dies of the present invention extrude a tube blank into a large convex structure; Figure 5 It is a schematic diagram of the front cross-sectional structure when the shaping die and two sets of lower shaping dies of the present invention extrude a tube blank into a large convex structure; Figure 6 It is a structural schematic diagram of the present invention when two groups of lower shaping dies move toward each other to extrude a large protrusion structure into a small protrusion structure; Figure 7 It is a schematic diagram of the structure when the bottom of the convex structure is cut off from the tube blank of the present invention; Figure 8 It is a schematic diagram of the structure of the present invention when the long branch pipe is finalized; Fig. 9 It is a schematic diagram of the structure of the long branch pipe after finalization of the present invention; Fig.10 It is a structural schematic diagram of the prior art of the present invention.

[0013] Markings in the attached drawings: 1. upper shaping die; 2. lower shaping die; 3. upper extrusion die; 4. lower extrusion die; 5. tie rod; 6. demolding die; 10. tube blank; 11. outer frame; 12. baffle. DETAILED DESCRIPTION

[0014] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Example 1

[0015] like Figures 1 to 10 As shown, an opening and closing mold for forming a high-pressure tee of an extended branch pipe includes an extrusion mechanism; an upper shaping mold 1, two sets of lower shaping molds 2 and a demolding mechanism, wherein the upper shaping mold 1 is located above the two sets of lower shaping molds 2, and the two sets of lower shaping molds 2 are slidably mounted on an outer frame 10; The extrusion mechanism pairs an upper extrusion die 3 and a lower extrusion die 4, and the lower extrusion die 4 is located above the upper extrusion die 3; The middle parts of the two groups of lower shaping molds 2 are both semicircular structures; The bottoms of the two groups of lower shaping molds 2 are both open structures; The corner position of the top of the semicircular structure of the lower shaping mold 2 is a smooth arc shape; The tube blank is placed on the upper extrusion die 3, and the upper extrusion die 3 and the lower extrusion die 4 extrude the tube blank to form an elliptical structure. Then the tube blank is placed on the two sets of lower shaping dies 2, and the upper shaping die 1 is driven downward by the hydraulic mechanism, so that the upper shaping die 1 and the two sets of lower shaping dies 2 extrude the tube blank into a round shape again. Since the middle parts of the two sets of lower shaping dies 2 are hollow, the middle part of the bottom end of the tube blank is not subjected to pressure, so that a larger convex structure is formed in the middle part of the tube blank. The upper shaping die 1 rises and resets, and then the two sets of lower shaping dies 2 move toward each other. Then, the two groups of baffles 12 are respectively inserted between the two groups of lower shaping molds 2 and the outer frame 10, and the two groups of lower shaping molds 2 are limited. Then, the upper shaping mold 1 is lowered, and the two groups of lower shaping molds 2 are cooperated to perform secondary extrusion on the tube blank, and the large convex structure is pressed into a small convex structure to form the basic structure of the three-way pipe. Then, the bottom of the convex structure is cut off, and then the demolding mechanism is used to cooperate with the two groups of lower shaping molds 2 and the upper shaping mold 1 to demold the convex structure, so that the convex structure becomes a branch pipe of the three-way pipe, and the three-way pipe is formed, thereby improving the practicality of the mold. Example 2

[0016] like Figures 1 to 10 As shown, an opening and closing mold for forming a high-pressure tee with an extended branch pipe, based on Example 1, also includes: The demoulding mechanism comprises a draw rod 5 and a demoulding die 6, wherein the demoulding die 6 is sleeved on the draw rod 5; The tube blank is placed on the upper extrusion die 3, and the upper extrusion die 3 and the lower extrusion die 4 extrude the tube blank to form an elliptical structure. Then, the tube blank is placed on the two sets of lower shaping dies 2, and the upper shaping die 1 is driven downward by the hydraulic mechanism, so that the upper shaping die 1 and the two sets of lower shaping dies 2 extrude the tube blank into a round shape. Since the middle parts of the two sets of lower shaping dies 2 are hollow, the middle part of the bottom end of the tube blank is not subjected to pressure, so that a large convex structure is formed in the middle part of the tube blank. The upper shaping die 1 rises and resets, and then moves toward each other through the two sets of lower shaping dies 2, and then the two sets of baffles 12 are respectively Two groups of lower shaping dies 2 are inserted between the outer frames 10, and the two groups of lower shaping dies 2 are limited. Then, the upper shaping die 1 is lowered, and the two groups of lower shaping dies 2 are cooperated to perform secondary extrusion on the tube blank, and the large convex structure is pressed into a small convex structure to form the basic structure of the three-way pipe. Then, the bottom of the convex structure is cut off, and the demolding die 6 is placed in the convex structure of the tube blank. By pulling the pull rod 5 downward, the demolding die 6 cooperates with the two groups of lower shaping dies 2 to extrude the convex structure of the tube blank, so that the convex structure becomes a branch pipe of the three-way pipe, and the three-way pipe is formed, thereby improving the practicality of the mold.

[0017] The main functions achieved by the present invention are: through two separate groups of lower shaping dies 2, a larger convex structure is conveniently formed on the tube blank, and then the upper shaping die 1 is raised and reset, and then the two groups of lower shaping dies 2 are moved toward each other, and then the upper shaping die 1 is lowered, and the tube blank is extruded for the second time in cooperation with the two groups of lower shaping dies 2, and the large convex structure is pressed into a small convex structure to form the basic structure of the three-way pipe, and then the convexity is demolded to facilitate the formation of a long branch of the three-way pipe and reduce the change in the wall thickness of the long branch of the three-way pipe.

[0018] The installation method, connection method or setting method of the opening and closing mold for the high-pressure tee of an extended branch pipe of the present invention are all common mechanical methods, and can be implemented as long as they can achieve their beneficial effects; the upper extrusion mold 3 and the lower extrusion mold 4 of the opening and closing mold for the high-pressure tee of an extended branch pipe of the present invention are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0019] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An opening and closing die for forming a high-pressure tee of an extended branch pipe, comprising an extrusion mechanism; characterized in that: It also comprises an upper shaping mold (1), two groups of lower shaping molds (2), an outer frame (10) and a mold removal mechanism, wherein the upper shaping mold (1) is located above the two groups of lower shaping molds (2), and the two groups of lower shaping molds (2) are slidably mounted on the outer frame (10).

2. The opening and closing mold for forming a high-pressure tee with an extended branch pipe as claimed in claim 1, characterized in that: The extrusion mechanism is connected to an upper extrusion die (3) and a lower extrusion die (4), wherein the lower extrusion die (4) is located above the upper extrusion die (3).

3. The opening and closing mold for forming a high-pressure tee with an extended branch pipe as claimed in claim 1, characterized in that: The middle parts of the two groups of lower shaping molds (2) are both semicircular structures.

4. The opening and closing mold for forming a high-pressure tee with an extended branch pipe as claimed in claim 1, characterized in that: The bottoms of the two groups of lower shaping dies (2) are both open structures.

5. The opening and closing mold for forming a high-pressure tee with an extended branch pipe as claimed in claim 1, characterized in that: The corner position at the top of the semicircular structure of the lower shaping mold (2) is in the shape of a smooth arc.

6. The opening and closing mold for forming a high-pressure tee with an extended branch pipe as claimed in claim 1, characterized in that: The demoulding mechanism comprises a pull rod (5) and a demoulding die (6), and the demoulding die (6) is sleeved on the pull rod (5).

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