Water leakage repairing steel block structure of thermal forming die

Abstract

The utility model discloses a water leakage repairing steel block structure of a thermal forming die, and belongs to the technical field of die cooling. The steel block comprises a steel block body, a cooling hole is formed in the steel block body, a preset distance is formed between the cooling hole and the forming face of the steel block body, a leakage repairing pipe is embedded in the cracking position of the cooling hole, and the outer wall of the leakage repairing pipe is in interference fit with the cooling hole. The leakage repairing pipe is embedded into the cracking position of the cooling hole and is in interference fit with the cooling hole, cracks of the cooling hole in the steel block can be effectively blocked, the water leakage phenomenon is prevented, the cooling effect of a plate in the stamping process is guaranteed, and therefore the rigidity of the plate is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of mold cooling, in particular to a water leakage repairing steel block structure of a hot forming mold. BACKGROUND

[0002] In a hot forming mold, a heated plate is placed on a steel block with water holes for stamping. In the process of stamping, the steel block uses water flowing in the water holes to take away heat, thereby cooling the plate to quench the plate and increase the rigidity of the plate. In order to ensure the cooling effect, the distance from the water hole to the mold surface is generally 8 mm. However, due to the large number of stamping times of the steel block on the plate (generally several thousand to several ten thousand times), the steel block is repeatedly subjected to thermal expansion and cold contraction for a long time. When the stress fatigue limit is reached, cracking occurs at the edge of the steel block, especially between the water hole and the mold surface. At this time, the steel block will leak water, thereby affecting the plate forming and cooling.

[0003] In the past, when the steel block water hole cracked, two ways were often used to solve the problem, namely, repair welding or replacement of the steel block. First, the repair welding has high limitations. Since the water hole is small, the welding rod cannot be inserted into the water hole, and only a small amount of welding can be performed on the surface, which has poor effect and may cause water leakage after a long time. Moreover, repair welding also has the risk of cracking. Second, the replacement of the steel block has high cost and long time. The cost of replacing a steel block from purchasing to processing and heat treatment is up to ten thousand yuan, and the time required is half a month, which greatly affects the production efficiency of the mold. CONTENT OF THE UTILITY MODEL

[0004] In order to help solve the problem of plate forming and cooling caused by cracking of the steel block water hole, the application provides a water leakage repairing steel block structure of a hot forming mold.

[0005] The water leakage repairing steel block structure of the hot forming mold provided by the application adopts the following technical scheme:

[0006] The water leakage repairing steel block structure of the hot forming mold comprises a steel block, a cooling hole is formed in the steel block, and a preset distance is provided between the cooling hole and a forming surface of the steel block. The cracking position of the cooling hole is embedded with a repairing pipe, and the outer wall of the repairing pipe is in interference fit with the cooling hole.

[0007] By adopting the above technical scheme, the cooling of the steel block mainly relies on the cooling liquid flowing in the cooling hole to take away heat. When the cooling hole cracks at a certain position, the repairing pipe is embedded in the cracking position of the cooling hole and is in interference fit with the cooling hole, so as to effectively block the cracks of the cooling hole in the steel block, prevent water leakage, ensure the cooling effect of the plate in the stamping process, and improve the rigidity of the plate. At the same time, the scheme reduces the production stop of the mold caused by the cracking of the steel block, and reduces the maintenance cost and the time required for replacing the steel block.

[0008] Optionally, the leakage repairing pipe is a copper pipe.

[0009] By adopting the above technical scheme, the copper pipe can effectively replace the cracked cooling hole as a leakage repairing pipe, and the heat conductivity and corrosion resistance of the copper pipe ensure the cooling effect and long-term use stability; the good deformation capacity of the copper pipe enables it to be embedded into the cooling hole through extrusion, and the thin wall and small linear expansion coefficient of the copper pipe ensure the water flow and avoid stress fatigue rupture caused by thermal expansion and cold contraction.

[0010] Optionally, the thickness of the leakage repairing pipe is 0.5-1mm.

[0011] By adopting the above technical scheme, the cooling hole can be efficiently and non-leakage heat-conducting, and good adhesion can be achieved when embedded into the cooling hole, thereby ensuring the cooling effect and service life.

[0012] Optionally, one end of the leakage repairing pipe embedded into the cooling hole is provided with a taper angle.

[0013] By adopting the above technical scheme, the leakage repairing pipe can be smoothly embedded into the cooling hole, the resistance in the embedding process is reduced, the embedding precision is improved, the secondary damage caused by uneven stress during embedding is effectively prevented, and the interference fit between the leakage repairing pipe and the cooling hole is facilitated, thereby ensuring the good sealing property of the cooling hole.

[0014] Optionally, the steel block comprises a mold body and a forming block arranged on one side of the mold body, the cooling hole comprises a first cooling hole and a second cooling hole, the first cooling hole is arranged in the middle of the forming block, the second cooling hole is arranged at the abutting position of the forming block and the mold body and in the mold body, and the aperture of the first cooling hole is smaller than that of the second cooling hole.

[0015] By adopting the above technical scheme, the forming block is the main pressure receiving surface, and the first cooling hole has a small aperture, which is beneficial to make the thickness between the forming surface and the first cooling hole larger than that between the forming surface and the second cooling hole, thereby ensuring the cooling effect, enhancing the structural stability of the steel block, making the steel block structure design more reasonable, and ensuring the effective cooling of different positions.

[0016] Optionally, one end of the leakage repairing pipe is extended beyond the cracked position of the cooling hole to form an extension end, and the extension end is provided with a removal hole.

[0017] By adopting the above technical scheme, when the leakage repairing pipe is damaged or needs to be replaced, the removal hole can be used to conveniently perform the removal operation, thereby improving the maintenance efficiency and reducing the downtime.

[0018] Optionally, the thickness of the extension end is greater than that of the leakage repairing pipe.

[0019] By adopting the above technical scheme, when the leak repairing pipe needs to be disassembled and repaired, the force bearing position of the leak repairing pipe is mainly at the extension end, so that the extension end has higher mechanical strength, and the stability and service life of the entire leak repairing structure are improved.

[0020] Optionally, a stepped disassembly part is formed between the inner wall of the extension end and the inner wall of the leak repairing pipe.

[0021] By adopting the above technical scheme, the leak repairing pipe can be disassembled and repaired through the cooperation of the stepped disassembly part and the removal hole, which is convenient for later maintenance and replacement, and improves the leak repairing efficiency and service life.

[0022] To sum up, the present application has at least one of the following beneficial technical effects:

[0023] 1. The copper pipe is used as the leak repairing pipe and is embedded in the cracking position of the cooling hole of the steel block. Through the good heat conductivity and corrosion resistance of the copper pipe, the cooling effect is improved, and the risk of water leakage is reduced.

[0024] 2. The wall thickness of the copper pipe is relatively thin, between 0.5 mm and 1 mm, which ensures smooth water flow and further enhances the stability and reliability of the cooling system.

[0025] 3. By embedding the copper pipe in the cooling hole to replace the original cracked part, the limitations and frequent maintenance problems of the traditional repair welding method are avoided, and the cost and time required for maintenance are greatly reduced compared to replacing the entire steel block. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of embodiment 1 of the present application.

[0027] Figure 2 is a schematic diagram of the structure of the leak repairing pipe in embodiment 1 of the present application.

[0028] Figure 3 is a schematic diagram of the connection between the leak repairing pipe and the cooling hole in embodiment 2 of the present application.

[0029] BRIEF DESCRIPTION OF DRAWINGS:

[0030] 10, steel block; 101, mold body; 102, shaped block; 11, cooling hole; 111, first cooling hole; 112, second cooling hole; 20, leak repairing pipe; 21, taper angle; 30, extension end; 31, removal hole; 32, stepped disassembly part. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings, and the described embodiments are only possible technical implementations of the present application, not all possible implementations. Those skilled in the art can obtain other embodiments by combining the embodiments of the present application without creative labor, and these embodiments are also within the protection scope of the present application.

[0032] The present application discloses a hot forming die leak repair steel block structure, which can repair the cooling hole of the steel block by embedding a copper pipe into the cracking position of the cooling hole, thereby achieving rapid repair and preventing water leakage, improving the service life of the die, and improving the cooling effect and prolonging the service life of the die.

[0033] Embodiment 1

[0034] The present application discloses a hot forming die leak repair steel block structure, which can repair the cooling hole of the steel block by embedding a copper pipe into the cracking position of the cooling hole, thereby achieving rapid repair and preventing water leakage, improving the service life of the die, and improving the cooling effect and prolonging the service life of the die. Figure 1 and Figure 2 The present application discloses a hot forming die leak repair steel block structure, which can repair the cooling hole of the steel block by embedding a copper pipe into the cracking position of the cooling hole, thereby achieving rapid repair and preventing water leakage, improving the service life of the die, and improving the cooling effect and prolonging the service life of the die.

[0035] Preferably, the copper pipe is used as the repair pipe, which has excellent heat conductivity, corrosion resistance and fatigue resistance, and is suitable for repair operation in high temperature environment. For example, a copper pipe with an outer diameter slightly larger than the inner diameter of the cooling hole 11 can be selected, and the copper pipe is firmly embedded in the cooling hole 11 by a certain interference amount to achieve tight fit. The wall thickness of the copper pipe is preferably 0.5mm to 1mm, which can ensure the strength and reduce the influence on water flow.

[0036] Preferably, one end of the copper pipe is provided with a taper angle 21 for easy insertion. The one end of the copper pipe is ground into a taper by machining, which facilitates the smooth entry into the cracking position. The design of the taper angle 21 helps to improve the smoothness during the embedding of the copper pipe and reduces the possibility of jamming during installation. In addition, a suitable lubricant can be used to assist the embedding of the copper pipe, further simplifying the operation process.

[0037] Preferably, the steel block 10 includes a die body 101 and a forming block 102 arranged on one side of the die body 101. The material of the die body 101 can be high-quality tool steel such as Cr12MoV or H13, and the hardness is in the range of HRC58~62. The forming block 102 is integrally formed with the die body 101.

[0038] The cooling hole 11 comprises a first cooling hole 111 and a second cooling hole 112. The first cooling hole 111 is located in the middle of the forming block 102 and is mainly used to ensure uniform cooling of the forming area. The second cooling hole 112 is distributed at the joint of the forming block 102 and the mold body 101 and inside the mold body 101, aiming to enhance the local heat dissipation effect.

[0039] Preferably, the diameter of the first cooling hole 111 is smaller than that of the second cooling hole 112, which is conducive to making the thickness between the forming surface and the first cooling hole 111 larger than the thickness between the forming surface and the second cooling hole 112, thereby ensuring the cooling effect, enhancing the structural stability of the steel block 10, making the structural design of the steel block 10 more reasonable, and ensuring effective cooling at different positions. Specifically, the preset distance between the cooling hole 11 and the forming surface of the steel block 10 is 7-9 mm to ensure the cooling effect.

[0040] The implementation principle of the present embodiment is as follows: first, use a flaw detection reagent to detect the depth and length of the crack in the steel block 10 to determine whether the copper pipe plugging method can be used to plug the leakage. When it is determined that this method can be used, a copper pipe with a size suitable for the size of the cooling hole 11 is selected and cut to a corresponding length. Then, the copper pipe is plugged into the cooling hole 11 by appropriate knocking, and the excess part outside the steel block 10 is ground off. Finally, water is passed through to check whether there is still leakage. By using a copper pipe with high thermal conductivity, corrosion resistance and fatigue resistance to repair the cracked cooling hole 11, the cooling effect is significantly improved, the service life of the mold is effectively prolonged, the maintenance cost and downtime are reduced, and the production efficiency and economic benefits are improved.

[0041] Embodiment 2

[0042] Compared with Embodiment 1, the difference lies in that, with reference to Figure 2 , one end of the leakage plugging pipe 20 is extended beyond the cracked position of the cooling hole 11 to form an extended end 30, and a removal hole 31 is formed in the extended end 30.

[0043] The removal hole 31 can be a round hole, a square hole, etc. When it is necessary to replace the leakage plugging pipe 20, a removal tool is inserted into the leakage plugging pipe 20, and the removal tool is used to block the removal hole 31, and the leakage plugging pipe 20 is pulled out of the cooling hole 11.

[0044] Preferably, the thickness of the extended end 30 is greater than the thickness of the leakage plugging pipe 20 itself, further enhancing the structural strength. When it is necessary to disassemble the leakage plugging pipe 20, the stress position of the leakage plugging pipe 20 is mainly in the extended end 30, so that the extended end 30 has higher mechanical strength, improving the stability and service life of the entire leakage plugging structure.

[0045] Preferably, the inner wall of the extension end 30 and the inner wall of the patch pipe 20 form a stepped disassembly part 32, which can be clamped by a disassembly tool to facilitate the extraction of the patch pipe 20 for positioning and replacement of damaged parts during later maintenance.

[0046] Compared with the embodiment 1, the embodiment has the advantage that the patch pipe 20 is easier to disassemble.

[0047] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A water leakage repair steel block structure of a hot forming die, characterized by, The application relates to a steel block (10) with a cooling hole (11) formed in the steel block (10) and having a preset distance from the forming surface of the steel block (10), wherein a crack position of the cooling hole (11) is embedded with a leakage repairing pipe (20) which is in interference fit with the outer wall of the cooling hole (11).

2. The water leakage repairing steel block structure of a hot forming die according to claim 1, characterized in that: The leakage repairing pipe (20) is a copper pipe.

3. The water leakage repairing steel block structure of a hot forming die according to claim 1 or 2, characterized in that: The thickness of the leakage repairing pipe (20) is 0.5-1 mm.

4. The water leakage repairing steel block structure of a hot forming die according to claim 1 or 2, characterized in that: One end of the leakage repairing pipe (20) embedded in the cooling hole (11) is provided with a taper angle (21).

5. The water leakage repairing steel block structure of a hot forming die according to claim 1, characterized in that: The steel block (10) comprises a mold body (101) and a forming block (102) arranged on one side of the mold body (101), the cooling hole (11) comprises a first cooling hole (111) and a second cooling hole (112), the first cooling hole (111) is arranged in the middle of the forming block (102), the second cooling hole (112) is arranged at the abutting position of the forming block (102) and the mold body (101) and in the mold body (101), and the aperture of the first cooling hole (111) is smaller than that of the second cooling hole (112).

6. The water leakage repairing steel block structure of a hot forming die according to claim 1, characterized in that: One end of the leakage repairing pipe (20) is extended beyond the crack position of the cooling hole (11) to form an extension end (30), and the extension end (30) is provided with a removal hole (31).

7. The water leakage repairing steel block structure of a hot forming die according to claim 6, characterized in that: The thickness of the extension end (30) is greater than that of the leakage repairing pipe (20).

8. The water leakage repairing steel block structure of a hot forming die according to claim 7, characterized in that: A stepped dismounting part (32) is formed between the inner wall of the extension end (30) and the inner wall of the leakage repairing pipe (20).

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