Eight-way connecting pipe follow-up forming device and method

Abstract

The eight-way connecting pipe follow-up forming device comprises a bottom plate, a lower die base is installed on the bottom plate, an inner cavity is formed in the center of the lower die base in a penetrating mode and communicates with the bottom plate, and a plurality of forming grooves are formed in the side wall of the inner cavity and distributed in the circumferential direction of the inner side of the inner cavity at equal intervals; an upper die base is arranged at the upper end of the lower die base, a guide channel is formed in the center of the upper die base, and a step is arranged in the guide channel and enables the lower-end caliber of the guide channel to be larger than the upper-end caliber of the guide channel; a guide cylinder is arranged on the bottom plate, the end, away from the bottom plate, of the guide-out cylinder penetrates out of the inner cavity, and the guide cylinder is located in the center of the inner cavity and matched with the upper end of the guide channel in a clamped mode. And in the whole machining process of the structural product, the metal flow line is continuous, the structure is uniform, the production and manufacturing process is continuous, the machining allowance is small, the production efficiency is high, the manufacturing cost is low, and practicability is high.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical manufacturing, and in particular to an eight-way pipe follow-up forming device and method. Background Art

[0002] The eight-way pipe is a special-shaped pipe structure with a cylindrical middle part and 6 inclined side nozzles evenly distributed near the middle. It is a key part in the boiler circulation system pipeline components and bears high temperature and high pressure. According to the high-temperature environment requirements for its use, it generally needs to be forged to meet the use requirements. However, due to the complex shape of this part, conventional forging is difficult to form. The current conventional manufacturing method is generally: forging the blank into a cylindrical blank as a whole or using a circular tooling to press out the steps at both ends, and then machining it to the final required size.

[0003] This method of processing will result in large processing allowances, resulting in greater stress during the processing, which will make it difficult to ensure the dimensional accuracy of the workpiece, unstable quality, discontinuous overall processing flow lines, long processing time, low production efficiency and high manufacturing costs. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an eight-way pipe follow-up forming device and method.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides an eight-way connecting pipe forming device, comprising a base plate, a lower die seat being installed on the base plate, an inner cavity being penetrated through the center of the lower die seat, the inner cavity being connected with the base plate, a plurality of shaping grooves being provided on the side walls of the inner cavity, and the plurality of shaping grooves being equally spaced along the circumferential direction of the inner side of the inner cavity; an upper die seat being provided at the upper end of the lower die seat, a guide channel being provided at the center of the upper die seat, a step being provided inside the guide channel, the step making the diameter of the lower end of the guide channel larger than the diameter of the upper end of the guide channel; a guide cylinder being provided on the base plate, the end of the guide cylinder away from the base plate being penetrated out of the inner cavity, the guide cylinder being located at the center of the inner cavity, and the guide cylinder being snap-fitted with the upper end of the guide channel.

[0007] Preferably, a positioning hole is provided at the upper end of the lower die base, and a guide column is installed on the upper die base, and the guide column is snap-fitted with the positioning hole.

[0008] Preferably, a positioning ring is provided at the bottom of the inner cavity.

[0009] Preferably, the caliber of the inner cavity increases gradually from bottom to top, and the lower end of the inner cavity is snap-fitted with the tubular blank.

[0010] Preferably, the outer surface of the upper end of the upper die seat is provided with an outer edge.

[0011] Preferably, a positioning through hole is provided on the outer edge, and the positioning through hole is arranged opposite to the positioning hole.

[0012] Preferably, the length of the guide cylinder is greater than the length of the tubular blank.

[0013] Preferably, the upper end surface of the lower die seat is provided with a plurality of notches, and the plurality of notches are respectively connected with the plurality of shaping grooves.

[0014] The present invention also provides a forging method of an eight-way pipe conforming forming device, comprising the following steps:

[0015] S1: First, a conventional forging method is used to forge a cylindrical blank;

[0016] S2: Continue heating the tubular blank at the initial forging temperature and keep it warm;

[0017] S3: After the cylindrical blank comes out of the furnace, it is directly placed in the lower die seat, and the cylindrical blank is directly sleeved on the guide cylinder;

[0018] S4: The upper die base is installed on the lower die base, the guide channel is sleeved on the guide cylinder, and the guide column passes through the positioning hole and directly passes into the positioning hole, so that the upper die base is installed on the lower die base, the center of the upper die base is concentric with the center of the lower die base, and the upper die base is connected to the lower die base;

[0019] S5: Press the lower die seat downward by external force, so that the cylindrical blank is squeezed downward in the mold cavity until the lower end surface of the upper die seat contacts the upper end surface of the upper die seat;

[0020] S6: The eight-way pipe is manufactured, the upper die seat and the lower die seat are turned over, the upper die seat is disassembled, and the molded eight-way pipe is taken out, and the processing is completed.

[0021] Preferably, both ends of the tubular blank are arranged in a conical shape.

[0022] The beneficial effects of the present invention are as follows: a mold cavity is formed by the lower mold base and the upper mold base together, and the cylindrical blank is forged and formed. At the same time, it is precisely positioned by the guide cylinder, so that the cylindrical blank is positioned and fixed at the center of the upper mold base and the lower mold base, which is convenient for the precise deformation and manufacturing of the cylindrical blank when the upper mold base is pressed down, and finally an eight-way pipe is formed, so that the manufacturing accuracy of the eight-way pipe is higher, the metal streamlines are continuous and the structure is uniform during the overall processing of the eight-way pipe, the production and manufacturing process is continuous, the processing allowance is small, the production efficiency is high, the production cost is low, and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional structural schematic diagram of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the lower die base of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the eight-way pipe of the present invention;

[0026] In the figure: 1-bottom plate; 2-lower die base; 3-forming groove; 4-upper die base; 5-guide channel; 6-step; 7-guide cylinder; 8-positioning hole; 9-guide column; 10-positioning ring; 11-cylindrical blank; 12-inner cavity; 13-outer edge; 14-positioning perforation. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In this embodiment, refer to Figure 1 and Figure 2 , including a bottom plate 1, on which a lower die base 2 is mounted, an inner cavity 12 is provided through the center of the lower die base 2, the inner cavity 12 is communicated with the bottom plate 1, a plurality of shaping grooves 3 are provided on the side wall of the inner cavity 12, and the plurality of shaping grooves 3 are evenly spaced along the inner circumference of the inner cavity 12, a plurality of notches are provided on the upper end surface of the lower die base 2, and the plurality of notches are respectively communicated with the plurality of shaping grooves 3, so as to facilitate the subsequent removal of the workpiece, a positioning ring 10 is provided at the bottom of the inner cavity 12, and the positioning ring 10 is fixedly mounted on the bottom plate 1 to position and support the cylindrical blank 11.

[0030] In this embodiment, refer to Figure 1 A guide cylinder 7 is fixedly mounted on the bottom plate 1 , and an end of the guide cylinder away from the bottom plate 1 passes through the inner cavity 12 , and the guide cylinder 7 is located at the center of the inner cavity 12 .

[0031] In this embodiment, refer to Figure 1 An upper die seat 4 is provided at the upper end of the lower die seat 2, and a guide channel 5 is opened at the center of the upper die seat 4. A step 6 is provided inside the guide channel 5. The step 6 makes the lower end diameter of the guide channel 5 larger than the upper end diameter of the guide channel 5, which is convenient for the upper end of the guide channel 5 to position and guide the guide cylinder 7, and also has the function of limiting and fixing. The lower end of the guide channel 5 is snap-fitted with the upper end of the tubular blank 11, so that the step 6 limits the tubular blank 11, which helps to process the tubular blank 11 to obtain the corresponding structure.

[0032] The guide cylinder 7 is also snap-fitted with the upper end of the guide channel 5 . The length of the guide cylinder 7 is greater than the length of the tubular blank 11 , so as to facilitate the guiding when the lower die base 2 and the upper die base 4 are connected.

[0033] In this embodiment, refer to Figure 1 The outer surface of the upper end of the upper die seat 4 is integrally formed with an outer edge 13, which is convenient for the staff to take the action. A positioning through hole 14 is opened on the outer edge 13, and there are two positioning through holes 14. A positioning hole 8 is provided at the upper end of the lower die seat 2, and there are two positioning holes 8. The two positioning through holes 14 are respectively arranged opposite to the two positioning holes 8. A guide column 9 is passed through the positioning through hole 14, and the guide column 9 is snap-fitted with the positioning hole 8. The guide column 9 is passed through the positioning through hole 14 and snapped into the positioning hole 8 to realize the positioning and fixation between the upper die seat 4 and the lower die seat 2, and the upper die seat 4 is prevented from rotating, thereby ensuring the accuracy of the upper die seat 4 and the lower die seat 2 in processing the cylindrical blank 11, and increasing the product qualification rate.

[0034] The working principle of this embodiment is as follows: the cylindrical blank 11 is placed in the lower die base 2, so that the cylindrical blank 11 is sleeved on the guide cylinder 7, and then the upper die base 4 is installed on the upper die base 4, and the guide channel 5 is sleeved on the guide cylinder 7. At the same time, the upper end of the cylindrical blank 11 contacts the surface of the step 6, so that the upper die base 4 is located above the lower die base 2, and the guide column 9 passes through the positioning through hole 14 and is snapped into the positioning hole 8, so that the upper die base 4 cannot rotate, and then the upper die base 4 is pressed downward by external force, so that the upper die base 4 is squeezed downward until the lower end surface of the upper die base 4 contacts the upper end surface of the lower die base 2, and the upper die base 4 and the lower die base 2 form a mold cavity together. The cylindrical blank 11 is forged into a structure of corresponding shape through the shape of the mold cavity, and the eight-way pipe forging is completed. The whole process is convenient to operate, efficient, and the product size accuracy is high, the processing allowance is small, the manufacturing cost is low, and the practicability is strong.

[0035] The preferred embodiment of the present invention also provides a forging method of an eight-way pipe follow-up forming device, comprising the following steps:

[0036] S1: First, a free forging method is used to forge a cylindrical blank 11. Both ends of the cylindrical blank 11 are set in a conical shape to avoid the phenomenon of excess accumulation of the subsequent blank during the extrusion process as much as possible, which is helpful to improve the accuracy of the structural product.

[0037] S2: The tubular blank 11 is heated to the initial forging temperature, which is about 1180°C. The heating is continued at the initial forging temperature, and the initial forging temperature is maintained continuously. The thickness of the tubular blank 11 is such that the tubular blank 11 needs to be kept warm for about 8 hours, so that the tubular blank 11 can soften and deform, and prepare for the deformation of the tubular blank 11.

[0038] S3: After the tubular blank 11 is taken out of the furnace, it is placed in the lower die base 2, and the tubular blank 11 is directly sleeved on the guide tube 7.

[0039] S4: Install the upper die base 4 on the lower die base 2, sleeve the guide channel 5 on the guide cylinder 7, and then pass the guide column 9 through the positioning hole 14 and directly into the positioning hole 8, so that the upper die base 4 is installed on the lower die base 2, the center of the upper die base 4 is concentric with the center of the lower die base 2, and the upper die base 4 and the lower die base 2 are connected.

[0040] S5: The upper die holder 4 is pressed downward by the extrusion machine, so that the cylindrical blank 11 is extruded downward in the mold cavity until the lower end surface of the upper die holder 4 contacts the upper end surface of the upper die holder 4, so that the cylindrical blank 11 is extruded and deformed into the shape in the mold cavity;

[0041] S6: After the forging of the eight-way pipe is completed, the positions of the lower die base 2 and the upper die base 4 are flipped, the guide column 9 is taken out, the upper die base 4 is removed from the lower die base 2, and the formed eight-way pipe is directly taken out, and the processing is completed.

[0042] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An eight-way pipe forming device, characterized in that: The invention comprises a bottom plate (1), a bottom plate (1) having a lower die seat (2) mounted on the bottom plate (1), an inner cavity (12) penetrating the center of the bottom plate (2), the inner cavity (12) being connected to the bottom plate (1), a plurality of shaping grooves (3) being provided on the side wall of the inner cavity (12), the plurality of shaping grooves (3) being distributed at equal intervals along the inner circumference of the inner cavity (12); an upper die seat (4) being provided at the upper end of the bottom plate (2), a guide channel (5) being provided at the center of the upper die seat (4), a step (6) being provided inside the guide channel (5), the step (6) making the lower end diameter of the guide channel (5) larger than the upper end diameter of the guide channel (5); a guide cylinder (7) being provided on the bottom plate (1), the end of the guide cylinder away from the bottom plate (1) penetrating the inner cavity (12), the guide cylinder (7) being located at the center of the inner cavity (12), the guide cylinder (7) being snap-fitted with the upper end of the guide channel (5).

2. The eight-way pipe forming device according to claim 1, characterized in that: The upper end of the lower die seat (2) is provided with a positioning hole (8), and the upper die seat (4) is provided with a guide column (9), which is snap-fitted with the positioning hole (8).

3. The eight-way pipe forming device according to claim 1, characterized in that: A positioning ring (10) is provided at the bottom of the inner cavity (12).

4. The eight-way pipe forming device according to claim 1, characterized in that: The caliber of the inner cavity (12) gradually increases from bottom to top, and the lower end of the inner cavity (12) is snap-fitted with the cylindrical blank (11).

5. The eight-way pipe forming device according to claim 1, characterized in that: The outer surface of the upper end of the upper die seat (4) is provided with an outer edge (13).

6. The eight-way pipe forming device according to claim 5, characterized in that: A positioning through hole (14) is provided on the outer edge (13), and the positioning through hole (14) and the positioning hole (8) are arranged opposite to each other.

7. The eight-way pipe forming device according to claim 1, characterized in that: The length of the guide tube (7) is greater than the length of the tubular blank (11).

8. The eight-way pipe forming device according to claim 1, characterized in that: The upper end surface of the lower die seat (2) is provided with a plurality of notches, and the plurality of notches are respectively connected with the plurality of shaping grooves (3).

9. A forging method for an eight-way pipe conforming forming device as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1: First, a conventional forging method is used to forge a cylindrical blank (11); S2: continuing to heat the tubular blank (11) at the initial forging temperature and keeping the temperature constant; S3: After the cylindrical blank (11) is taken out of the furnace, it is placed in the lower die base (2), and the cylindrical blank (11) is sleeved on the guide cylinder (7); S4: The upper die base (4) is mounted on the lower die base (2), the guide channel (5) is sleeved on the guide cylinder (7), passes through the positioning hole (14) through the guide column (9), and directly passes into the positioning hole (8), so that the upper die base (4) is mounted on the lower die base (2), the center of the upper die base (4) is concentric with the center of the lower die base (2), and the upper die base (4) and the lower die base (2) are connected; S5: pressing the upper die base (4) downward by external force, so that the tubular blank (11) is squeezed downward in the mold cavity until the lower end surface of the upper die base (4) contacts the upper end surface of the upper die base (4); S6: The manufacturing of the eight-way pipe is completed, the positions of the upper die base (4) and the lower die base (2) are turned over, the upper die base (4) is disassembled, and the molded eight-way pipe is taken out, and the processing is completed.

10. A forging method for an eight-way pipe conforming forming device as claimed in claim 9, characterized in that: Both ends of the cylindrical blank (11) are arranged in a conical shape.

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