Bulging integrated device with double parallel branch pipes

Abstract

The utility model discloses an integrated bulging device of parallel double branch pipes, which comprises a forming die, an upsetting part and a movable punch, the forming die comprises an upper die and a lower die which are used for forming pipe blanks, the upper die and the lower die form an inner cavity with the same appearance as the double branch pipes when closed, and the upper die and the lower die are arranged in the inner cavity. The upsetting part comprises a left pressing plate and a right pressing plate which are used for upsetting the pipe blank in the left-right radial direction, the left pressing plate and the right pressing plate are arranged in a gap between the upper die and the lower die, and the movable punches are arranged at the two ends of the pipe blank correspondingly. And the clamping device is used for clamping the pipe blank and injecting pressure into the pipe blank. The pipe blank is machined through the upper die, the lower die, the left side pressing plate and the right side pressing plate at the same time, the number of the dies is reduced, working procedure operation is simplified, and pipe blank flattening preforming and double-branch-pipe hydraulic bulging technology integration is achieved.

Description

Technical Field

[0001] This utility model relates to the field of branch pipe manufacturing, and in particular to an integrated expansion device for parallel double branch pipes. Background Technology

[0002] The use of hydraulic bulging technology to form parallel double-branch pipes enables integrated forming of pipe fittings. Compared with traditional stamping and welding processes, hydraulic bulging technology can reduce the weight of parts and improve their strength and rigidity. The pipe fittings are seamless and have advantages such as low production energy consumption and green energy saving.

[0003] However, because each parallel double-branch pipe has two parallel branches, axial material feeding is difficult, thus requiring a multi-process forming method. A large-diameter tube blank is used, first flattened, and then placed into a parallel double-branch pipe forming mold. Finally, after mold closing, hydraulic pressure is applied to the flattened tube blank to form the parallel double-branch pipe. Existing forming technologies suffer from numerous processes and low forming efficiency; therefore, how to achieve efficient forming of parallel double-branch pipes is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] To overcome the problems of numerous processes and low forming efficiency in existing forming technologies, this utility model provides an integrated bulging device for parallel double-branch tubes, which helps to reduce the number of molds and simplify process operations, and integrates the tube blank flattening preforming and branch tube hydraulic bulging process.

[0005] The technical solution is as follows: An integrated bulging device for parallel double-branch pipes includes a forming die, an upsetting component, and a moving punch. The forming die includes an upper die and a lower die for forming the pipe blank. When the upper die and the lower die are closed, they form an inner cavity that conforms to the outer shape of the double-branch pipe. The upsetting component includes a left pressure plate and a right pressure plate for upsetting the pipe blank in the left and right radial directions. The left pressure plate and the right pressure plate are disposed in the gap between the upper die and the lower die. The moving punch is disposed at both ends of the pipe blank for clamping the pipe blank and injecting pressure into the pipe blank.

[0006] Preferably, the movable punch includes a keyway plate, a guide rod, a movable top plate, a spring, and a punch. The keyway plate is frame-shaped, the guide rod is vertically arranged inside the keyway plate, the spring is movably sleeved on the guide rod, and the punch includes a limiting end and a clamping end. The limiting end is movably sleeved on the guide rod and located above the spring, the clamping end extends out of the keyway plate and makes sealing contact with the billet port, and the movable top plate covers the keyway plate on one side of the limiting end of the punch.

[0007] Preferably, at least one of the punches is provided with a filling hole.

[0008] Preferably, the movable top plate is provided with a vertical dovetail groove, and the punch limiting end is provided with a dovetail key. The dovetail groove and the dovetail key are installed together to restrict the vertical up and down movement of the punch.

[0009] Preferably, the upper and lower ends of the optical rod extend out of the keyway plate and are provided with threads, which, in conjunction with a nut, fix the optical rod to the keyway plate.

[0010] Preferably, the movable top plate is fixed to the keyway plate by screws or bolts.

[0011] This invention processes the tube blank simultaneously using an upper mold, a lower mold, a left pressure plate, and a right pressure plate, reducing the number of molds and simplifying the process. It also integrates the tube blank flattening pre-forming and the double-branch pipe hydraulic bulging process. Furthermore, this device can process larger diameter tube blanks into smaller diameter double-branch pipes, reducing processing costs. Attached Figure Description

[0012] Figure 1 This is a front view of the expansion-integrated device with parallel double branches of this utility model;

[0013] Figure 2 This is a perspective view of the expansion-integrated device with parallel double branches of this utility model;

[0014] Figure 3 This is an axial cross-sectional view of the movable punch assembly of this utility model;

[0015] Figure 4 This is a front view of a dual-branch pipe manufacturing apparatus without a pipe blank in place.

[0016] Figure 5 This is a front view of the double-branch pipe manufacturing apparatus during the placement of the tube blank;

[0017] Figure 6 This is a front sectional view of the integrated expansion device for parallel double-branch pipes of this utility model before upsetting the tube blank;

[0018] Figure 7 This is a side sectional view of the tube blank before upsetting in the integrated expansion device for parallel double-branch tubes of this utility model.

[0019] Figure 8 This is a side sectional view of the tube blank after upsetting by the integrated expansion device for parallel double-branch tubes of this utility model.

[0020] Figure 9 This is a schematic diagram of the radii-expansion forming device for parallel double-branch pipes of this utility model, which performs radial pressure bulging on the pipe blank. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection and application of the present invention.

[0022] This utility model discloses an integrated bulging device for parallel double-branch pipes, comprising a forming die, an upsetting component, and a movable punch. The forming die includes an upper die 1 and a lower die 2 for forming the pipe blank A. When the upper die 1 and the lower die 2 are closed, they form an inner cavity that conforms to the shape of the double-branch pipe. The pipe blank A is the blank for processing the parallel double-branch pipe, and the upper die 1 and the lower die 2 are the molds for forming the pipe blank A into the parallel double-branch pipe.

[0023] The upsetting component includes a left pressure plate 3 and a right pressure plate 4 for upsetting the tube blank A in the left and right radial directions. The left pressure plate 3 and the right pressure plate are disposed in the gap between the upper die 1 and the lower die 2. The left punch is located on the left side of the tube blank A and is used to apply radial pressure to the left side of the tube blank A, and the right punch is located on the right side of the tube blank A and is used to apply radial pressure to the right side of the tube blank A.

[0024] The movable punches are respectively located at both ends of the tube blank A, and are used to clamp the tube blank A and pressurize the tube blank A. The movable punches include a keyway plate 5, a smooth rod 6, a movable top plate 7, a spring 8, and a punch 9.

[0025] The keyway plate 5 is frame-shaped, and the guide rod 6 is vertically installed inside the keyway plate 5. Specifically, the upper and lower ends of the guide rod 6 extend out of the keyway plate 5 and are provided with threads. The threads are used to fix the guide rod 6 vertically on the keyway plate 5 by cooperating with the nut 10. The spring 8 is movably sleeved on the guide rod 6.

[0026] The punch 9 includes a limiting end 91 and a clamping end 92. The limiting end 91 has a through hole, which is movably fitted onto the guide rod 6 and located above the spring 8. When this invention is not in operation, the spring 8 lifts the punch 9, bringing it into contact with the inner top of the keyway plate 5, placing the punch 9 at its uppermost position. Utilizing this characteristic, the top of the keyway plate 5 serves as the positioning point for the punch 9. The clamping end 92 extends out of the keyway plate 5 and makes sealed contact with the A port of the tube blank.

[0027] The movable top plate 7 covers the keyway plate 5 on one side of the limiting end 91 of the punch 9 and is fixed to the keyway plate 5 with screws or bolts. The movable top plate 7 is provided with a vertical dovetail groove 71, and the limiting end 91 of the punch 9 is provided with a dovetail key 94. The dovetail groove 71 and the dovetail key 94 are fitted together to restrict the vertical up and down movement of the punch 9. The movable top plate 7 is connected to a hydraulic cylinder, which controls the movement of the punch 9 towards each other to clamp the tube blank A and seal both ends of the tube blank A.

[0028] At least one punch 9 is provided with a filling hole, and in this application, both punches 9 are provided with filling holes 93.

[0029] The method of using this utility model is as follows:

[0030] 1. Place the tube blank A between the upper mold 1 and the lower mold 2, and clamp the tube blank A by moving the punches 9 at both ends of the tube blank A in opposite directions, and seal the two ends of the tube blank A by the pressure of the hydraulic cylinder.

[0031] 2. The left pressure plate 3 and the right pressure plate on both sides of the tube blank A move towards each other to flatten the tube blank A radially. After the tube blank A is flattened to the preset value, the left pressure plate 3 and the right pressure plate move away from each other to return to their original positions.

[0032] 3. The upper mold 1 is pressed down, and the moving punch 9 is simultaneously driven downward by the tube blank A and compresses the spring 8. The tube blank A is compressed by the upper mold 1 and the lower mold 2. At this time, hydraulic pressure is applied to the tube blank A through the filling hole 93 of the punch 9. When the upper mold 1 and the lower mold 2 are in contact, the hydraulic pressure is increased to make the tube blank A expand into a double branch tube.

[0033] 4. After the bulging process is complete, the upper mold moves upward, and the punch 9 is pushed upward by the spring 8 to reset, so that the formed tube B is separated from the lower mold 2. Subsequently, the hydraulic cylinder retracts, and the two punches 9 move in opposite directions to separate from the tube B, and the tube B is removed.

[0034] 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, 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 bulging integrated device with parallel double branches, characterized in that, The device includes a forming die, an upsetting component, and a movable punch. The forming die includes an upper die and a lower die for forming the tube blank. When the upper die and the lower die are closed, they form an inner cavity that conforms to the shape of the double-branch tube. The upsetting component includes a left pressure plate and a right pressure plate for upsetting the tube blank in the left and right radial directions. The left pressure plate and the right pressure plate are disposed in the gap between the upper die and the lower die. The movable punch is disposed at both ends of the tube blank and is used to clamp the tube blank and inject pressure into the tube blank. The movable punch includes a keyway plate, a guide rod, a movable top plate, a spring, and a punch. The keyway plate is frame-shaped, the guide rod is vertically disposed in the keyway plate, and the spring is movably sleeved on the guide rod. The punch includes a limiting end and a clamping end. The limiting end is movably sleeved on the guide rod and located above the spring. The clamping end extends out of the keyway plate and is in sealed contact with the end of the tube blank. The movable top plate covers the keyway plate on one side of the limiting end of the punch.

2. The integrated expansion device for parallel dual-branch pipes according to claim 1, characterized in that, At least one of the punches is provided with a filling hole.

3. The integrated expansion device for parallel double-branch pipes according to claim 1, characterized in that, The movable top plate is provided with a vertical dovetail groove, and the punch limiting end is provided with a dovetail key. The dovetail groove and the dovetail key are installed together to restrict the vertical up and down movement of the punch.

4. The integrated expansion device for parallel dual-branch pipes according to claim 1, characterized in that, The upper and lower ends of the optical rod extend out of the keyway plate and are provided with threads. The threads are used to fix the optical rod to the keyway plate by cooperating with the nuts.

5. The integrated expansion device for parallel double-branch pipes according to claim 1, characterized in that, The movable top plate is fixed to the keyway plate by screws or bolts.

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