A device for hydrostatic forming of copper-chromium-zirconium alloy tubes

Abstract

The utility model provides a kind of copper chromium zirconium alloy pipe water swelling forming device, including forming processing seat and knob transmission box, hydraulic ram is longitudinally installed in the upper end of forming processing seat inside by bolt and flange, the movable end of hydraulic ram is installed with connecting plate by bolt, upper die seat plate is welded in the lower end of connecting plate, upper die seat is clamped into in the lower end of upper die seat plate, lower die seat plate is welded in the lower end of forming processing seat inside, lower die seat is clamped in the upper end of lower die seat plate, the design solves the problem that existing single steel mould is mostly integral cavity mould, cavity and target variable diameter size match, cannot be disassembled, the utility model uses double knob limiting structure, the quick disassembly or replacement of lower die seat and upper die seat can be realized, to facilitate the water swelling forming operation of other size copper chromium zirconium alloy pipe.

Description

Technical Field

[0001] This utility model is a copper-chromium-zirconium alloy pipe hydroforming device, belonging to the field of pipe processing technology. Background Technology

[0002] Copper-chromium-zirconium alloy tubes, due to their high strength (tensile strength ≥600MPa), high electrical conductivity (≥70% IACS), and excellent heat resistance (operating temperature ≤300℃), are widely used in high-end fields such as aerospace (e.g., engine oil circuits) and power equipment (e.g., conductive bushings). Water-expanding forming technology applies high-pressure water (typically 200-800MPa) to the inside of the tube blank, causing it to plastically deform and conform to the cavity within a mold, forming complex structures such as diameter changes and bends. Compared to traditional mechanical stamping, it offers advantages such as high forming precision (dimensional deviation ≤±0.1mm) and no surface damage (roughness Ra≤1.6μm).

[0003] However, most existing single steel molds (Cr12 steel) are integral cavity molds, with the cavity matching the target diameter size and not detachable. There is an urgent need for a copper-chromium-zirconium alloy tube hydroforming device to solve the above-mentioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a water-expanding forming device for copper-chromium-zirconium alloy tubes, thereby solving the problems mentioned in the background. This invention adopts a double-knob limiting structure, which enables the rapid disassembly or replacement of the lower and upper mold bases, thus facilitating the water-expanding forming of copper-chromium-zirconium alloy tubes of other sizes.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a copper-chromium-zirconium alloy tube hydraulic expansion forming device, comprising a forming processing base and a knob transmission box. A hydraulic rod is longitudinally mounted on the upper end of the forming processing base via bolts and flanges. A connecting plate is mounted on the movable end of the hydraulic rod via bolts. An upper mold base plate is welded to the lower end of the connecting plate, and an upper mold seat is inserted into the lower end of the upper mold base plate. A lower mold base plate is welded to the lower end of the forming processing base, and a lower mold seat is inserted into the upper end of the lower mold base plate. Cylinder rods are installed on both sides of the forming processing base. A punch head is mounted on the movable end of each of the two cylinder rods via flanges and bolts. High-pressure water injection holes are opened in both punch heads. The knob transmission box is provided with two... The upper knob transmission box is fixed to the upper right side of the upper mold base plate, and the lower knob transmission box is fixed to the lower left side of the lower mold base plate. A first bevel gear is installed at the rear end of each of the two knob transmission boxes. Multiple bearing seats are installed inside each of the two knob transmission boxes. Two bidirectional threaded rods are installed through the multiple bearing seats. A second bevel gear is installed at the rear end of each of the two bidirectional threaded rods. Metal nuts are threaded onto the front and rear ends of each of the two bidirectional threaded rods. Stroke grooves are opened at the front and rear ends of the inner sides of each of the two knob transmission boxes. Bent connecting rods are slidably installed in each of the multiple stroke grooves. Metal plates are welded to the other ends of each of the multiple bent connecting rods. Multiple metal welding shafts are welded to the inner sides of each of the multiple metal plates.

[0006] Furthermore, the upper mold base plate, the upper mold base, and the lower mold base have multiple positioning grooves on their lower end faces, and multiple positioning shafts are welded to the upper end of the lower mold base plate, with each of the multiple positioning shafts facing directly below the multiple positioning grooves.

[0007] Furthermore, both cylinder rods are connected to external cylinders via air pipes, and external water supply pipes are provided through the side surfaces of both stamping heads. The water supply ends of the two external water supply pipes are respectively connected to two high-pressure water injection holes, and the water inlet ends of the two external water supply pipes are respectively connected to external high-pressure water pumps.

[0008] Furthermore, a knob is installed on the outer side of each of the two first bevel gears, and the two second bevel gears mesh with the two first bevel gears respectively for transmission.

[0009] Furthermore, both of the knob transmission boxes have stroke seats installed on their front and rear sides, and multiple metal nuts are slidably located in multiple stroke seats. Multiple bent connecting rods pass through multiple stroke grooves and are fixed to multiple metal nuts.

[0010] Furthermore, the lower mold base plate and the front and rear ends of the lower mold base are provided with multiple first positioning grooves, and the upper mold base plate and the front and rear ends of the upper mold base are provided with multiple second positioning grooves. The multiple metal welding shafts are respectively inserted into the multiple first positioning grooves and the multiple second positioning grooves.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a copper-chromium-zirconium alloy tube hydroforming device. Because it adds an upper mold base plate, an upper mold base, a lower mold base plate, a lower mold base, a positioning shaft, a knob transmission box, a first bevel gear, a knob rod, a second bevel gear, a bearing seat, a bidirectional threaded rod, a metal nut, a bending connecting rod, a metal plate, and a metal welding shaft, the structure is reasonable. It adopts a double knob limiting structure, which can realize the quick disassembly or replacement of the lower mold base and the upper mold base, thereby facilitating the hydroforming operation of copper-chromium-zirconium alloy tubes of other sizes. It is highly practical. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the structure of a copper-chromium-zirconium alloy tube hydroforming device according to the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the copper-chromium-zirconium alloy tube water expansion forming device of this utility model during use;

[0015] Figure 3 This is an enlarged structural diagram of the position of a single knob rod in a copper-chromium-zirconium alloy tube hydroforming device according to the present invention;

[0016] Figure 4 This is a schematic diagram of the metal welding shaft structure of a copper-chromium-zirconium alloy tube hydroforming device according to the present invention;

[0017] Figure 5 This is a side sectional view of the knob transmission box of the copper-chromium-zirconium alloy tube hydroforming device of this utility model.

[0018] In the diagram: 1-forming processing seat, 2-hydraulic rod, 3-connecting plate, 4-upper mold base plate, 5-upper mold base, 6-lower mold base plate, 7-lower mold base, 8-positioning shaft, 9-cylinder rod, 10-punch head, 11-high pressure water injection hole, 12-knob transmission box, 13-first bevel gear, 14-knob rod, 15-second bevel gear, 16-bearing seat, 17-double-ended threaded rod, 18-stroke seat, 19-metal nut, 20-stroke groove, 21-bending connecting rod, 22-metal plate, 23-metal welding shaft. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] Please see Figures 1-5This utility model provides a technical solution: a copper-chromium-zirconium alloy tube hydroforming device, including a forming processing seat 1 and a knob transmission box 12. A hydraulic rod 2 is longitudinally installed on the upper end of the forming processing seat 1 via bolts and flanges. A connecting plate 3 is installed on the movable end of the hydraulic rod 2 via bolts. An upper mold base plate 4 is welded to the lower end of the connecting plate 3. An upper mold base 5 is inserted into the lower end of the upper mold base plate 4. A lower mold base plate 6 is welded to the lower end of the forming processing seat 1. A lower mold base 7 is inserted into the upper end of the lower mold base plate 6. Cylinder rods 9 are installed on both sides of the forming processing seat 1. A punch head 10 is installed on the movable end of each of the two cylinder rods 9 via flanges and bolts. High-pressure water injection holes 11 are opened in both punch heads 10. Two knob transmission boxes 12 are provided; the upper knob transmission box 12 is fixed to the upper right side of the upper mold base plate 4, and the lower knob transmission box 12 is fixed to... At the lower left end of the lower mold base plate 6, the rear ends of the two knob transmission boxes 12 are each equipped with a first bevel gear 13. Multiple bearing seats 16 are installed inside each of the two knob transmission boxes 12. Two bidirectional threaded rods 17 are threaded through the multiple bearing seats 16. A second bevel gear 15 is installed at the rear end of each of the two bidirectional threaded rods 17. Metal nuts 19 are threaded onto the front and rear ends of the two bidirectional threaded rods 17. Stroke grooves 20 are opened on the front and rear ends of the inner sides of the two knob transmission boxes 12. Bent connecting rods 21 are slidably installed within the multiple stroke grooves 20. Metal plates 22 are welded to the other ends of the multiple bent connecting rods 21. Multiple metal welding shafts 23 are welded to the inner sides of the multiple metal plates 22. This design solves the problem that most existing single steel molds are integral cavity molds, where the cavity matches the target diameter and cannot be disassembled.

[0021] As the first embodiment of this utility model: multiple positioning grooves are provided on the lower end faces of the upper mold base plate 4, upper mold base 5, and lower mold base 7. Multiple positioning shafts 8 are welded to the upper end of the lower mold base plate 6. The multiple positioning shafts 8 are respectively aligned with the lower part of the multiple positioning grooves. By adding multiple positioning shafts 8, the positioning and installation of the upper mold base 5 and the lower mold base 7 can be realized. Both cylinder rods 9 are connected to external cylinders through air pipes. External water supply pipes are provided through the side surfaces of both punch heads 10. The water supply ends of the two external water supply pipes are respectively connected to two high-pressure water injection holes 11. The water inlet ends of the two external water supply pipes are respectively connected to external high-pressure water pumps. The added cylinder rods 9, external cylinders, and external high-pressure water pumps are all existing known technologies. A knob rod 14 is installed on the outer side of each of the two first bevel gears 13. The two second bevel gears 15 mesh with the two first bevel gears 13 respectively. By adding the two second bevel gears 15 to mesh with the two first bevel gears 13 respectively, the two second bevel gears 15 can be driven to rotate when the two first bevel gears 13 rotate.

[0022] Both knob transmission boxes 12 have stroke seats 18 installed on their front and rear sides. Multiple metal nuts 19 slide within the stroke seats 18. Multiple bent connecting rods 21 pass through multiple stroke slots 20 and are fixed to the metal nuts 19. By adding multiple bent connecting rods 21 that pass through multiple stroke slots 20 and are fixed to the metal nuts 19, the multiple bent connecting rods 21 can move when the metal nuts 19 move. The lower mold base plate 6 and the lower mold base 7 have multiple first positioning slots at their front and rear ends. The upper mold base plate 4 and the upper mold base 5 have multiple second positioning slots at their front and rear ends. Multiple metal welded shafts 23 are inserted into the first and second positioning slots. By adding multiple metal welded shafts 23 that are inserted into the first and second positioning slots, the installation and fixation between the upper mold base plate 4 and the upper mold base 5, and between the lower mold base plate 6 and the lower mold base 7 can be achieved.

[0023] As a second embodiment of this utility model: The copper-chromium-zirconium alloy tube is placed in the cavity of the lower mold base 7. The hydraulic rod 2 is controlled to move downwards until the upper mold base 5 is tightly against the lower mold base 7. At this time, multiple positioning shafts 8 are fully inserted into multiple positioning slots. Two cylinder rods 9 are controlled to move towards each other by an external cylinder until the two cylinder rods 9 slowly abut against the left and right sides of the copper-chromium-zirconium alloy tube. Water is then injected into the two high-pressure water injection holes 11 by an external high-pressure water pump, thus achieving the water-expansion forming operation of the copper-chromium-zirconium alloy tube. When it is necessary to disassemble the upper mold base 5, one hand holds the lower end of the upper mold base 5, and the other hand turns the upper knob rod 14. 14 drives the first bevel gear 13 to rotate, and the second bevel gear 15 meshes with it and rotates accordingly, which in turn drives the bidirectional threaded rod 17 to rotate. Since the front and rear threads rotate in opposite directions, the bidirectional threaded rod 17 can drive the two metal nuts 19 to move in opposite directions when it rotates. At this time, it will drive the two bent connecting rods 21 to move in opposite directions in the two stroke grooves 20, and the two metal plates 22 will also be driven to move in opposite directions until the multiple metal welding shafts 23 exit from the multiple second positioning grooves. Then the upper mold base 5 can be detached from the upper mold base plate 4. The lower mold base 7 can also be disassembled by following the same steps, which is quick and convenient.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for hydrostatic forming of copper-chromium-zirconium alloy tubes, comprising a forming station (1) and a knob transmission box (12), characterized in that: The upper end of the forming processing seat (1) is longitudinally mounted with a hydraulic rod (2) via bolts and flanges. The movable end of the hydraulic rod (2) is mounted with a connecting plate (3) via bolts. The lower end of the connecting plate (3) is welded with an upper mold base plate (4). The lower end of the upper mold base plate (4) is fitted with an upper mold base (5). The lower end of the forming processing seat (1) is welded with a lower mold base plate (6). The upper end of the lower mold base plate (6) is fitted with a lower mold base (7). Cylinder rods (9) are installed on both sides of the forming processing seat (1). The movable ends of the two cylinder rods (9) are mounted with punch heads (10) via flanges and bolts. Both punch heads (10) have high-pressure water injection holes (11) inside. There are two knob transmission boxes (12). The upper knob transmission box (12) is fixed to the upper right side of the upper mold base plate (4). The lower knob transmission box (12) is fixed to the upper right side of the upper mold base plate (4). The knob transmission box (12) is fixed to the lower left side of the lower mold base plate (6). The two knob transmission boxes (12) are equipped with a first bevel gear (13) at the rear end. The two knob transmission boxes (12) are equipped with multiple bearing seats (16). Two bidirectional threaded rods (17) are installed through the multiple bearing seats (16). The two bidirectional threaded rods (17) are equipped with a second bevel gear (15) at the rear end. The two bidirectional threaded rods (17) are equipped with metal nuts (19) through threads at the front and rear ends. The two knob transmission boxes (12) are equipped with stroke grooves (20) at the front and rear ends. The multiple stroke grooves (20) are equipped with bent connecting rods (21). The other end of the multiple bent connecting rods (21) is welded with a metal plate (22). The multiple metal plates (22) are welded with multiple metal welding shafts (23).

2. The copper-chromium-zirconium alloy tube hydroforming device according to claim 1, characterized in that: The lower end faces of the upper mold base plate (4), upper mold base (5) and lower mold base (7) are provided with multiple positioning grooves, and the upper end of the lower mold base plate (6) is welded with multiple positioning shafts (8), and the multiple positioning shafts (8) are respectively facing the lower part of the multiple positioning grooves.

3. The copper-chromium-zirconium alloy tube hydroforming device according to claim 1, characterized in that: Both cylinder rods (9) are connected to external cylinders through air pipes. Both stamping heads (10) have external water supply pipes running through their side surfaces. The water supply ends of the two external water supply pipes are connected to two high-pressure water injection holes (11) respectively. The water inlet ends of the two external water supply pipes are connected to external high-pressure water pumps respectively.

4. The copper-chromium-zirconium alloy tube hydroforming device according to claim 1, characterized in that: A knob rod (14) is installed on the outside of each of the two first bevel gears (13), and the two second bevel gears (15) mesh with the two first bevel gears (13) respectively.

5. The copper-chromium-zirconium alloy tube hydroforming device according to claim 1, characterized in that: Both of the knob transmission boxes (12) have stroke seats (18) installed on the front and back sides. Multiple metal nuts (19) slide in multiple stroke seats (18) respectively. Multiple bent connecting rods (21) pass through multiple stroke grooves (20) and are fixed to multiple metal nuts (19).

6. The copper-chromium-zirconium alloy tube hydroforming device according to claim 1, characterized in that: The lower mold base plate (6) and the lower mold base (7) are provided with multiple first positioning grooves at their front and rear ends, and the upper mold base plate (4) and the upper mold base (5) are provided with multiple second positioning grooves at their front and rear ends. The multiple metal welding shafts (23) are respectively inserted into the multiple first positioning grooves and the multiple second positioning grooves.

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