Composite board explosive device for solving overlarge deformation in explosive welding process of composite board

Abstract

The utility model discloses a composite board explosive device for solving the problem of overlarge deformation in the explosive welding process of a composite board, which belongs to the technical field of explosive welding of composite boards and comprises a buffer base arranged on a foundation; the base plate is arranged on the buffer base; the compound plate is arranged on the base plate and is supported on the base plate through foot pads; the explosive frame is arranged on the compound plate so that the explosive special for explosive welding can be arranged on the compound plate in a surrounding mode; the height of the explosive in the explosive frame is gradually reduced from the middle position to the periphery, so that the explosive in the explosive frame forms a trapezoidal structure; a primer is arranged in the center of the explosive frame; and the limiting unit is connected with the buffering base and arranged corresponding to the medicine frame so as to limit the medicine frame. According to the explosion device for the composite board, the problem that the deformation amount is too large in the explosive welding process of the composite board can be solved, the deformation amount can be reduced, and the phenomenon that the explosion thinning amount is out of tolerance due to the fact that edge collision kinetic energy is too large due to superposition of detonation energy is effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the field of composite plate explosive welding technology, specifically relating to an explosive device for composite plates that solves the problem of excessive deformation during the explosive welding process. Background Technology

[0002] Explosive welding is a special welding method that uses explosives to drive high-speed oblique collisions between metal plates, resulting in a metallurgical bond between the metals. The basic principle of explosive welding is that when the explosive is detonated on the metal plate to be welded (usually called the cladding plate), the explosive rapidly reacts chemically, releasing a large amount of energy and generating a strong shock wave. The shock wave acts on the cladding plate at extremely high speed and pressure, causing it to move at high speed towards another metal plate (the substrate).

[0003] Traditional explosive composite panels cannot adjust the tilt angle of the composite panel during assembly, making it impossible to determine whether the base plate and the composite panel are parallel to each other. Furthermore, during the explosive welding process, the device is prone to tilting under the load of explosives, and the large amount of deformation generated has a significant impact on the thickness and appearance after molding. Utility Model Content

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] An explosive welding device for composite plates that solves the problem of excessive deformation during the explosive welding process, comprising:

[0006] A buffer base, wherein the buffer base is disposed on a foundation;

[0007] A substrate, the substrate being disposed on the buffer base;

[0008] A composite plate is disposed on the substrate and supported on the substrate by pads to ensure that the composite plate is placed horizontally.

[0009] An explosive frame is provided on the cover plate to surround the explosive welding explosive on the cover plate; the height of the explosive in the explosive frame decreases from the middle to the periphery to form a trapezoidal structure; a detonator is provided at the center of the explosive frame;

[0010] A limiting unit is provided, which is connected to the buffer base and is correspondingly provided with the medicine frame to limit the movement of the medicine frame.

[0011] Furthermore, the buffer base includes a buffer shell and a buffer material; the buffer shell is disposed on and communicates with the foundation; a pad that contacts the foundation is disposed inside the buffer shell; the buffer material fills the buffer shell through an opening at the top of the buffer shell to cover the pad; the base plate is placed on the buffer shell and is adapted to the opening at the top of the buffer shell.

[0012] Furthermore, a limit baffle is provided at the top opening of the buffer housing to limit the position of the substrate.

[0013] Furthermore, the limiting unit includes multiple limiting brackets, multiple limiting plates, and multiple label plates; the multiple limiting brackets are circumferentially arranged on the outer wall of the buffer shell and connected to the outer wall of the buffer shell; the multiple limiting brackets are correspondingly arranged with the multiple limiting plates, and the multiple limiting brackets are correspondingly arranged with the multiple label plates; the limiting plate is disposed on the end of the limiting bracket away from the foundation and is connected to the limiting bracket in an adjustable relative position to limit the medicine frame; the label plate is connected to the limiting bracket in an adjustable relative position and is correspondingly arranged with the composite plate to mark both ends of the composite plate.

[0014] Furthermore, the bottom of the standard plate and the bottom of the cover plate are set on the same horizontal line.

[0015] Furthermore, the pad is V-shaped; the pad is laterally disposed between the substrate and the cladding, with the opening of the pad facing outward.

[0016] Beneficial effects:

[0017] This utility model provides a composite plate explosive device for solving the problem of excessive deformation during the explosive welding of composite plates. It adopts a trapezoidal explosive distribution structure, which promotes a relatively stable and uniform detonation process to a certain extent, reducing the amount of deformation. Under the premise that the tilting collision speed of the base plate and the cladding plate is within the weldable window, it effectively prevents the excessive thinning caused by excessive edge collision kinetic energy due to the superposition of detonation energy, thus effectively ensuring the uniformity of the overall cladding thickness of the composite plate. Without affecting the explosive bonding effect, the base plate, the cladding plate, and the explosive frame are respectively limited to prevent the device from tilting during the explosion. The position of the cladding plate is adjusted by adjusting the position and number of V-shaped pads to make the standard plate and the cladding plate horizontally aligned, ensuring that the cladding plate and the base plate are parallel to each other. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of a composite plate explosion device according to the present invention for solving the problem of excessive deformation during the explosion welding process of composite plates;

[0019] Figure 2This is a top view of a composite plate explosion device according to the present invention for solving the problem of excessive deformation during the explosion welding process of composite plates;

[0020] Among them, 1. Buffer base; 11. Buffer shell; 12. Buffer material; 13. Limiting baffle; 14. Pad block; 2. Base plate; 3. Cover plate; 4. Digital electronic detonator; 5. Explosive frame; 6. Limiting unit; 61. Limiting bracket; 62. Limiting plate; 63. Marking plate; 7. Foot pad; 8. Detonator; 9. Pure explosive. Detailed Implementation

[0021] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "horizontal," "inner," "outer," and "one side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example 1

[0024] Reference Figures 1 to 2 An explosive welding device for composite plates, comprising:

[0025] Buffer base 1, which is set on the foundation;

[0026] Substrate 2 is mounted on buffer base 1;

[0027] The composite plate 3 is disposed on the substrate 2 and supported on the substrate 2 by the pads 7, so that the composite plate 3 remains parallel.

[0028] The explosive frame 5 is set on the cover plate 3 to surround the explosive welding explosive on the cover plate 3; the height of the explosive in the explosive frame 5 decreases from the middle position to the periphery, so that the explosive height in the middle position of the explosive frame 5 is the highest, so that the explosive in the explosive frame 5 forms a trapezoidal structure; a detonator is set at the center position of the explosive frame;

[0029] Limiting unit 6 is connected to buffer base 1 and is set correspondingly to medicine frame 5 to limit the movement of medicine frame 5.

[0030] The detonator 8 is connected to pure explosive 9 and digital electronic detonator 4 to detonate the explosive welding explosive in the explosive frame 5.

[0031] By adopting the above technical solution and using a "trapezoidal" explosive distribution structure, the detonation process is made relatively stable and uniform to a certain extent, reducing the amount of deformation. Under the premise that the tilting collision speed of the composite plate 3 is within the weldable window, it effectively prevents the excessive explosion thinning caused by the excessive edge collision kinetic energy due to the superposition of detonation energy, and effectively ensures the uniformity of the overall composite plate thickness.

[0032] In this embodiment, the buffer base 1 includes a buffer shell 11 and a buffer material 12; the buffer shell 11 is disposed on the foundation and communicates with the foundation; a pad 14 in contact with the foundation is disposed inside the buffer shell 11; the buffer material 12 is filled inside the buffer shell 11 through the opening at the top of the buffer shell 11 to cover the pad 14; the substrate 2 is placed on the buffer shell 11 and is adapted to the opening.

[0033] Preferably, the pad 14 is concentrically arranged with the substrate 2, and the length of the pad 14 is longer than the length of the substrate 2.

[0034] In this embodiment, a limiting baffle 13 is provided at the top opening of the buffer housing 11 to limit the substrate 2.

[0035] Through the above technical solution, the force of the explosive acting on the foundation is buffered by the pad block 14 and the buffer material 12. The base plate 2 is limited by the limiting baffle 13 of the opening at the top of the buffer shell 11. The size of the space enclosed by the limiting baffle 13 is adapted to the base plate 2. The base plate 2 is placed in it and contacts the buffer material 12 in the buffer shell 11. The top of the buffer material 12 in the buffer shell 11 is smoothed so that the base plate 2 is placed horizontally in the buffer shell 11 and remains parallel to the foundation.

[0036] In this embodiment, the limiting unit 6 includes multiple limiting brackets 61, multiple limiting plates 62, and multiple marking plates 63. The multiple limiting brackets 61 are circumferentially arranged on the outer wall of the buffer shell 11 and connected to the outer wall of the buffer shell 11. The multiple limiting brackets 61 and the multiple limiting plates 62 are arranged in a one-to-one correspondence, and the multiple limiting brackets 61 and the multiple marking plates 63 are arranged in a one-to-one correspondence. The limiting plate 62 is arranged on the end of the limiting bracket 61 away from the foundation and is connected to the limiting bracket 61 in an adjustable relative position to limit the medicine frame 5. The marking plate 63 is connected to the limiting bracket 61 in an adjustable relative position and is arranged correspondingly to the composite plate to mark the two ends of the composite plate.

[0037] In this embodiment, the bottom of the standard plate 63 and the bottom of the cover plate 3 are set on the same horizontal line to ensure that the cover plate 3 is placed horizontally and remains parallel to the substrate 2.

[0038] Preferably, the ends of the limiting plate 62 and the standard plate 63 that are away from the cover plate 3 are provided with threads, and the positions of the limiting plate 62 and the cover plate 3 on the limiting bracket 61 are adjusted by the cooperation of the nut and the thread.

[0039] Using the above technical solution, after placing the composite plate 3 on the pad 7 on the base plate 2, the position of the marker plate 63 on the limiting bracket 61 is adjusted so that the bottom of the marker plate 63 is aligned with the bottom of the composite plate 3, ensuring that the composite plate 3, the base plate 2 and the foundation remain parallel to each other, and ensuring that the composite plate 3 and the base plate 2 are concentrically set; then, after placing the explosive frame 5 on the composite plate 3, the position of the upper limit plate 62 on the limiting bracket 61 is adjusted, and the upper limit plate 62 is tightened appropriately, so that the explosive frame 5 is clamped by the upper limit plate 62, limiting the explosive frame 5 and preventing the explosive frame 5 from tilting during the explosion.

[0040] In this embodiment, the pad 7 is V-shaped; the pad 7 is horizontally disposed between the substrate 2 and the composite plate 3, and the opening of the pad 7 faces outward.

[0041] The working principle of the composite plate explosion device provided by this utility model for solving the problem of excessive deformation during the explosion welding of composite plates is as follows (taking the base plate 2 as SA516Gr7042*φ2980mm and the composite plate 3 as ASME SB265 Gr2, 6*φ3030mm as an example):

[0042] S1, Substrate 2 is selected from SA516Gr7042*φ2980mm, and Composite Plate 3 is selected from ASME SB265 Gr2, 6*φ3030mm. This composite plate is used in the heat exchanger tube sheet of a certain export PTA project. The required delivery size is (6+42)*φ2930mm, which conforms to ASTMB898 Class B.

[0043] S2 and cladding plate 3 are welded using argon arc welding. The excess height on the upper and lower surfaces of the weld is ground smooth and subjected to 100% PT penetration testing to ensure compliance. Then, cladding plate 3 is leveled using a thirteen-roll leveling machine. After the substrate 2 is cut and blanked, the cutting slag around it is cleaned up. The substrate 2 is pre-leveled using a high-precision intelligent seven-roll leveling machine to adjust the flatness of the entire board to 1.0-1.5mm.

[0044] S3. Use a 60-mesh abrasive belt to grind and polish the mating surface of substrate 2 to remove oxide scale and surface rust. Then use an 80-mesh flap wheel to polish the mating surface to meet the requirement of 2.0μm smoothness. Use an 80-mesh flap wheel to polish the mating surface of cladding plate 3 to remove the surface oxide film and expose the metallic luster to meet the requirement of 1.6μm smoothness. Then lay a 2mm thick layer of EPE pearl cotton on the mating surface of substrate 2. The pearl cotton protects the mating surface before the explosion to avoid scratches or abrasions caused by friction between metals. Then stack the mating surfaces of substrate 2 and cladding plate 3 opposite each other, ready for explosion.

[0045] S4. On the pre-leveled and leveled blast foundation, lay an 8mm thick, φ3000 pad. After placing it horizontally, lay a layer of fine sand about 32-35mm thick on top of it, ensuring that it is evenly laid and about 40-42mm higher than the surrounding area. Then mark the boundary of the pad.

[0046] S5. Place the prepared substrate 2 horizontally on the prepared detonation bed, ensuring that the boundary of the substrate 2 is completely within the marked boundary of the pad. Clean the mating surface to remove dust and debris, and clean the mating surface with a cleaning agent. Then, evenly place titanium V-shaped pads 7 around the substrate 2. The pads 7 are 8mm high, with the V-shaped opening facing outwards. Place N V-shaped pads 7 evenly in the middle of the top of the substrate 2, with the V-shaped opening facing the same direction as the detonation direction. Then, install the cleaned composite plate 3 with the mating surface facing down and parallel to the substrate 2, ensuring that the composite plate 3 is concentric with the substrate 2 after installation and that the V-shaped pads 7 do not collapse or deform. At the same time, adjust the position of the standard plate 63 on the limiting bracket 61 and the position of the V-shaped pads so that the bottom of the standard plate 63 is flush with the bottom of the composite plate 3, ensuring that the composite plate 3 is in a horizontal state.

[0047] S6. Arrange the annular explosive frame 5 around the perimeter of the composite plate 3. Then, apply a protective layer of industrial grease with a thickness of about 1.0 to 1.5 mm evenly to the upper surface of the composite plate 3. Place a φ20 mm detonator 8 at the center. Then, evenly spread the prepared explosive with a detonation velocity of 1920 m / s and a density of 0.76 g / cm³ inside the explosive frame 5. 3For titanium-steel composite plates with a briss of 8.3mm, use a titanium scraper to spread the explosive evenly, and then use a wooden collecting board to collect the explosive from the edge to the center, ensuring that the explosive height is 56mm within a 1-meter diameter of the center. Starting from 500mm from the edge, the explosive height decreases, forming a trapezoidal arrangement with an explosive height of 48mm at the edge.

[0048] S7. After the explosive is placed, a small amount of pure explosive 9 is placed in the detonator 8 at the center of the explosive. The detonation velocity of this pure explosive 9 is 3500m / s and the briss is 14mm. The height of the pure explosive is the same as the height of the central explosive. Then, the digital electronic detonator 4 is vertically inserted into the center of the pure explosive 9, and the lower end of the detonator's shaped charge hole is in contact with the surface of the composite plate 3.

[0049] S8. After the detonator lead wires are connected and the test is passed, the detonator is detonated, resulting in a titanium-steel composite tube sheet with the following material combination: ASME SB265 Gr2+SA516Gr70 and the following size: (6+42)*φ2980. The overall deformation is slight, with no local deep deformation.

[0050] S9. Due to the special characteristics of the titanium-steel composite plate, machine oil was used as a coupling agent for UT non-destructive testing. After 100% UT testing, except for the non-bonding area at the detonation point (within φ20mm), all other areas showed 100% bonding. The non-bonding area at the detonation point (outside the φ20mm area) met the Class B requirements of ASTM B898. Stress-relieving heat treatment was performed in an electric resistance furnace at a holding temperature of 540±10℃ for 145 minutes, with a heating / cooling rate ≤110℃ / h. After exiting the furnace, a high-precision intelligent seven-roll leveling machine was used for leveling, followed by cutting, polishing, packaging, and delivery.

[0051] The final product dimensions are (6+42)*φ2930, and the flatness is 2mm for the entire board.

[0052] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A composite plate explosion welding device for solving the problem of excessive deformation during composite plate explosion welding, characterized in that, The utility model relates to a buffer base, base plate, composite plate, medicine frame and limiting unit, and belongs to the field of buffer base. Buffer base is arranged on the foundation; Base plate is arranged on the buffer base; Composite plate is arranged on the base plate and supported on the base plate through the foot pad; Medicine frame is arranged on the composite plate to surround the explosion welding special explosive on the composite plate; the explosive in the medicine frame decreases from the middle position to the periphery, so that the explosive in the medicine frame forms a trapezoidal structure; the center position of the medicine frame is provided with a detonator; Limiting unit is connected with the buffer base and arranged corresponding to the medicine frame to limit the medicine frame.

2. The explosive device for solving the problem of excessive deformation of the clad plate in the explosion welding process of the clad plate according to claim 1, characterized in that, The buffer base includes a buffer shell and a buffer material; the buffer shell is arranged on the foundation and communicates with the foundation; the buffer shell is provided with a cushion block in contact with the foundation; the buffer material is filled in the buffer shell through the opening at the top of the buffer shell to cover the cushion block; the base plate is placed on the buffer shell and adapts to the opening at the top of the buffer shell.

3. The explosive device for solving the problem of excessive deformation of the composite plate in the explosive welding process of the composite plate according to claim 2, characterized in that, The opening at the top of the buffer shell is provided with a limiting baffle to limit the base plate.

4. The composite plate explosion device according to claim 2, wherein The limiting unit includes a plurality of limiting supports, a plurality of limiting plates and a plurality of marker plates; a plurality of limiting supports are circumferentially arranged on the outer wall of the buffer shell and connected with the outer wall of the buffer shell; a plurality of limiting supports and a plurality of limiting plates and a plurality of limiting supports and a plurality of marker plates are arranged one by one; the limiting plate is arranged on the end of the limiting support away from the foundation and is connected with the limiting support in adjustable relative position to limit the medicine frame; the marker plate is connected with the limiting support in adjustable relative position and is arranged corresponding to the composite plate to mark the two ends of the composite plate.

5. The composite plate explosion device according to claim 4, wherein The bottom of the marker plate is arranged on the same horizontal line with the bottom of the composite plate.

6. The composite plate explosion device according to claim 1, wherein The foot pad is V-shaped; the foot pad is transversely arranged between the base plate and the composite plate, and the opening direction of the foot pad faces outward.

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