Damaged hole remanufacturing and repairing device and method

Abstract

The invention provides a damaged hole remanufacturing and repairing method which comprises the following steps: performing reaming treatment on a damaged hole to obtain a regular reaming hole; preparing a filling material block matched with the diameter of the reamed hole, and placing the filling material block in the reamed hole in an interference fit mode; turning on a laser head, heating and melting the filling material block to obtain a filling material after laser heating and melting, and combining the filling material after laser heating and melting with the substrate; a friction stir head is opened, the tissue of the filling material subjected to laser heating melting is subjected to plastic deformation through mechanical stirring machining, the filling material subjected to stirring machining is formed, and repairing of the damaged hole is completed; meanwhile, the invention further provides a damaged hole remanufacturing and repairing device.

Description

Technical Field

[0001] The present application belongs to the technical field of remanufacturing and repairing damaged holes, and in particular, relates to a device and method for remanufacturing and repairing damaged holes. Background Art

[0002] Hole damage remanufacturing repair technology is an efficient, economical and environmentally friendly metal repair method, which is specially used to solve the hole damage caused by impact, wear or corrosion of metal substrates or other metal materials. This technology first accurately evaluates the damaged area, followed by thorough surface pretreatment, including cleaning and removal of impurities, to ensure good bonding between the repair material and the substrate. After the hole expansion process, the appropriate filling material is selected and accurately placed, heated and fused by a heat source, cooled and solidified, and necessary post-processing, such as grinding and polishing, is performed to restore the original appearance and performance of the component. Finally, performance testing is performed to ensure that the repair area meets the design and use standards. The advantages of this technology are improved material utilization, shortened downtime, reduced costs, and in some cases improved performance of the repair area, providing a reliable and cost-effective solution for the repair of critical components.

[0003] With the continuous advancement of technology, the remanufacturing and repair technology of puncture damage will continue to be optimized, bringing more innovation and value to the industrial field. In the process of remanufacturing and repairing puncture damage, the metal melting deposition technology preheats the substrate, uses a high-power laser to simultaneously melt the metal powder or wire and deposits it layer by layer to the damaged area, so as to achieve precise filling and repair of the damaged area. This process requires strict control of process parameters to ensure the metallurgical bonding of the cladding layer and the substrate, and through post-processing and quality inspection, ensure that the mechanical properties and microstructure of the repaired part meet the use requirements, thereby extending the service life of the parts and reducing material waste, showing the potential for wide application in the field of difficult-to-process material repair. However, it has the following problems:

[0004] (1) In practical applications, there are problems such as poor fusion and internal defects (such as pores and microcracks);

[0005] (2) Precise process control and post-processing are required to solve the problem;

[0006] Therefore, there is an urgent need to develop an efficient and high-quality remanufacturing and repair method and device for damaged holes. Summary of the invention

[0007] Purpose of the invention: To prepare a filling material of a uniformly mixed powder of yttrium oxide rare earth oxide particles and titanium-based metal, and to utilize friction stir processing technology to promote the close bonding of the filling material and the substrate through mechanical stirring to produce strong plastic deformation, thereby significantly improving the repair effect, in order to solve the problems of poor fusion and internal defects (such as pores and microcracks) faced in the remanufacturing and repair process of metal material puncture damage.

[0008] In a first aspect, the present application provides a method for remanufacturing and repairing a damaged hole, the method comprising the following steps:

[0009] Performing hole enlargement processing on the damaged hole 2 to obtain a regular enlarged hole 3;

[0010] Prepare a filling material block 4 that matches the diameter of the expanded hole, and place the filling material block 4 in the expanded hole 3 by interference fit;

[0011] Turning on the laser head 5, heating and melting the filling material block 4 to obtain the laser-heated and melted filling material 7, and combining the laser-heated and melted filling material 7 with the substrate 1;

[0012] The friction stirring head 6 is turned on, and the structure of the filling material 7 melted by laser heating is plastically deformed by mechanical stirring processing to form a stirring-processed filling material 8, thereby completing the repair of the damaged hole.

[0013] Preferably, before the damaged hole 2 is expanded to obtain a regular expanded hole, the method further includes:

[0014] The surface of the substrate 1 is pre-cleaned; wherein the pre-cleaning includes grinding to remove burrs and removing oil stains.

[0015] Preferably, a preset distance is set between the edge of the expanded hole 3 and the edge of the damaged hole 2 .

[0016] Preferably, the preset distance is the minimum distance between the edge of the expanded hole 3 and the edge of the damaged hole 2 .

[0017] Preferably, the filling material block 4 is a cylindrical block obtained by hot pressing a uniformly mixed powder of yttrium oxide rare earth oxide particles and titanium-based metal.

[0018] In a second aspect, the present application also provides a damaged hole remanufacturing and repairing device, the device comprising:

[0019] The hole enlarging device is used to enlarge the damaged hole 2 to obtain a regular enlarged hole 3

[0020] A filling material block, used to fill the expanded hole;

[0021] A laser head is used to heat and melt the filling material block 4 to obtain the laser-heated and melted filling material 7, so that the laser-heated and melted filling material 7 is combined with the substrate 1;

[0022] The friction stir processing head is used to plastically deform the structure of the filling material 7 melted by laser heating through mechanical stirring processing to form the stirring-processed filling material 8.

[0023] Preferably, the device further comprises:

[0024] The pre-cleaning device is used to pre-clean the surface of the substrate 1; wherein the pre-cleaning includes grinding to remove burrs and removing oil stains.

[0025] Preferably, the filling material block 4 is a cylindrical block obtained by hot pressing a uniformly mixed powder of yttrium oxide rare earth oxide particles and titanium-based metal.

[0026] Beneficial technical effects of this application:

[0027] The present invention provides a method and device for remanufacturing and repairing damaged holes based on stir friction processing, which prepares a filling material of a uniformly mixed powder of yttrium oxide rare earth oxide particles and titanium-based metal, and utilizes stir friction processing technology to promote the close bonding of the filling material and the substrate through mechanical stirring to produce strong plastic deformation, thereby significantly improving the repair effect, so as to solve the problem of efficient and high-quality repair of puncture damage in metal materials.

[0028] This method uses pretreatment and advanced laser melting and friction stir technology. The laser melting technology can increase local heat input and increase melting depth to improve the problem of poor fusion. The friction stir technology, as a solid phase deformation technology, can not only refine the structure, but also heal the pores or microcracks in the material itself or in the process, thereby overcoming problems such as poor fusion and internal defects (such as pores and microcracks), significantly improving the repair accuracy, reliability and mechanical properties of the substrate, and effectively extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of a damaged hole in a metal substrate provided by an embodiment of the present invention;

[0030] Figure 2 is a diagram showing the selection of positions for expanding damaged holes in a metal substrate provided by an embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of filling damaged holes in a metal substrate provided by an embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of laser heating and melting of a filling material provided by an embodiment of the present invention;

[0033] Figure 5 is a schematic diagram of a friction stir processing filling material provided by an embodiment of the present invention;

[0034] Figure 6It is a schematic diagram of a metal substrate after a damaged hole is repaired provided by an embodiment of the present invention.

[0035] Figure 7 is a flowchart of metal substrate damage repair provided by an embodiment of the present invention;

[0036] Among them: metal substrate 1, damaged hole 2, expanded hole 3, filling material 4, laser head 5, stir friction processing head 6, filling material after laser heating and melting 7, filling material after stirring processing 8, and matrix plastic deformation area after stirring processing 9. DETAILED DESCRIPTION

[0037] The present application discloses a method for remanufacturing and repairing damaged holes based on friction stir processing. This method not only ensures the quality of the repair, but also improves the reusability of the substrate. This method ensures the perfect fusion of the damaged hole and the substrate through precise surface pretreatment and precisely controlled filling material matching, significantly improving the accuracy and reliability of the repair. At the same time, the use of laser melting and friction stir technology not only strengthens the bonding strength between materials, but also enhances the mechanical properties of the repair area through strong plastic deformation, thereby extending the service life of the substrate.

[0038] See also Figure 1-Figure 7 The present invention provides a method for remanufacturing and repairing damaged holes based on stir friction processing. The method aims to remanufacture and repair bullet damaged holes on metal substrates. First, the substrate surface needs to be thoroughly pre-cleaned, including grinding to remove burrs and removing oil stains, to ensure that the parallelism of the entire substrate surface is controlled within 2 mm.

[0039] Next, the damaged hole is expanded to ensure that the minimum distance between the expanded hole edge and the damaged hole reaches 10 mm to facilitate subsequent repair. Then, a filling material block matching the expanded hole diameter is carefully prepared and placed in the expanded hole using an interference fit.

[0040] Then, the laser head is started to heat and melt the filling material, so that it can be integrated with the surface of the substrate. Finally, the friction stir technology is used to promote the close combination of the filling material and the substrate through mechanical stirring, resulting in strong plastic deformation, thereby significantly improving the repair effect. This process not only ensures the quality of the repair, but also improves the reusability of the substrate.

[0041] In the embodiment of the present application, the following steps are specifically included:

[0042] Step 1: Pre-clean the surface of the substrate 1, including grinding to remove burrs and remove oil stains, to ensure that the parallelism of the entire substrate surface is controlled within 2 mm;

[0043] Step 2: Expand the damaged hole 2 to ensure that the minimum distance between the edge of the expanded hole 3 and the damaged hole 2 reaches 10 mm;

[0044] Step 3: Prepare a filling material block 4 that matches the diameter of the expanded hole, hot-press the uniformly mixed powder of yttrium oxide rare earth oxide particles and titanium-based metal into a cylindrical block, the diameter of which is consistent with the expanded hole 3, and place it in the expanded hole 3 by interference fit;

[0045] Step 4: Turn on the laser head 5 and use laser heating and melting to heat and melt the filling material 4 so that it is combined with the substrate 1;

[0046] Step 5: Open the friction stirring head 6, and use mechanical stirring processing to cause large plastic deformation of the structure of the filling material 7 melted by laser heating to form the filling material 8 after stirring processing.

[0047] In other embodiments of the present application, the present invention provides a method for remanufacturing and repairing bullet damage holes based on friction stir processing.

[0048] Specifically, Figure 1 As shown, the surface of the substrate 1 needs to be pre-cleaned, including grinding to remove burrs and removing oil stains, to ensure that the parallelism of the entire substrate surface is controlled within 2 mm.

[0049] Specifically, Figure 2 As shown, the damaged hole 2 is enlarged to ensure that the minimum distance between the edge of the enlarged hole 3 and the damaged hole 2 reaches 10 mm, in order to make the enlarged hole completely cover the damaged hole and avoid excessive repair.

[0050] Specifically, Figure 3 As shown, a filling material block 4 matching the diameter of the expanded hole is prepared, and a uniformly mixed powder of yttrium oxide rare earth oxide particles and titanium-based metal is hot pressed into a cylindrical block, the diameter of which is consistent with the expanded hole 3, and is placed in the expanded hole 3 by an interference fit.

[0051] Preparation method of filler material block: When selecting filler materials, the availability, cost and repair effect are taken into consideration. Yttrium oxide rare earth oxide is used as a reinforcing phase to provide excellent creep resistance and high temperature stability, while titanium-based metal powder has the characteristics of high strength and light weight. The two are mixed in a specific proportion to ensure the uniformity of the material and the performance of the final product. The mixed powder is evenly stirred to form a prefabricated blank. The process requires strict control of the mixing temperature, time and humidity to prevent particle agglomeration or separation of material components. In the hot zone, the mixed powder is placed in a mold and hot-pressed. Under a certain temperature and pressure, the powder particles are compacted to form a dense block. This process reduces the porosity of the material while ensuring the mechanical properties of the final product. The key parameters of the hot pressing process include temperature, pressure, holding time, and heating and cooling rates.

[0052] Specifically, Figure 4 As shown, the laser is set to an appropriate power to ensure that it can provide sufficient energy to heat and melt the filling material 4. Next, a continuous or pulsed laser heating method is used. According to the melting point of the filling material and the material properties of the substrate 1, the laser scanning speed, focal length, frequency and other parameters are adjusted to make the laser energy act evenly on the surface of the filling material 4 to gradually melt it. Under the action of the laser, the melted filling material is fully integrated with the surface of the substrate 1, and gradually solidifies during the cooling process to form a stable bonding layer.

[0053] Specifically, Figure 5 As shown, the friction stirring head 6 is turned on, and the organization of the filling material 7 after laser heating and melting is subjected to large plastic deformation through mechanical stirring processing to form the filling material 8 after stirring processing. During the mechanical stirring process, the high-speed rotation of the friction stirring head produces strong thermal and plastic deformation, which causes the organizational structure of the filling material 7 to undergo violent dynamic recrystallization, thereby producing large-scale grain refinement and uniform distribution. This large plastic deformation not only improves the bonding strength between the filling material and the substrate, but also improves the microstructure and mechanical properties of the material. At the same time, the heat input during the stirring process and the geometric shape of the stirring head work together to prompt the filling material to fully fill the area to be welded and form the filling material 8 after stirring processing. In this process, by observing the degree of deformation and the flow state of the material in real time, it is ensured that the processing process is stable and uniform to obtain excellent metallurgical bonding and surface quality.

[0054] The beneficial effect of the present invention is to provide a method and method for remanufacturing and repairing damaged holes based on friction stir processing. Prepare a filling material of a uniformly mixed powder of yttrium oxide rare earth oxide particles and titanium-based metal, and use friction stir processing technology to promote the close bonding of the filling material and the substrate through mechanical stirring to produce strong plastic deformation, thereby significantly improving the repair effect, so as to solve the problem of efficient and high-quality repair of broken holes in metal materials. This method achieves seamless fusion of the damaged hole and the substrate through pretreatment and advanced laser melting and friction stir technology, significantly improving the repair accuracy, reliability and mechanical properties of the substrate, and effectively extending its service life.

Claims

1. A method for remanufacturing and repairing a damaged hole, characterized in that: The method comprises the following steps: Performing hole enlargement processing on the damaged hole (2) to obtain a regular enlarged hole (3); Prepare a filling material block (4) matching the diameter of the expanded hole, and place the filling material block (4) in the expanded hole (3) by means of interference fit; Turning on the laser head (5), heating and melting the filling material block (4) to obtain a laser-heated and melted filling material (7), and combining the laser-heated and melted filling material (7) with the substrate (1); The friction stirring head (6) is turned on, and the structure of the filling material (7) melted by laser heating is plastically deformed through mechanical stirring processing to form a stirring-processed filling material (8), thereby completing the repair of the damaged hole.

2. The method according to claim 1, characterized in that Before the damaged hole (2) is expanded to obtain a regular expanded hole, the method further comprises: The surface of the substrate (1) is pre-cleaned; wherein the pre-cleaning includes grinding to remove burrs and removing oil stains.

3. The method according to claim 2, characterized in that A preset distance is provided between the edge of the expanded hole (3) and the edge of the damaged hole (2).

4. The method according to claim 3, characterized in that The preset distance is the minimum distance between the edge of the expanded hole (3) and the edge of the damaged hole (2).

5. The method according to claim 1, characterized in that The filling material block (4) is a cylindrical block obtained by hot pressing a uniformly mixed powder of yttrium oxide rare earth oxide particles and titanium-based metal.

6. A damaged hole remanufacturing and repairing device, characterized in that: The device comprises: A hole enlarging device is used to perform hole enlarging processing on the damaged hole (2) to obtain a regular enlarged hole (3) A filling material block, used to fill the expanded hole; A laser head is used to heat and melt the filling material block (4) to obtain a laser-heated and melted filling material (7), and to combine the laser-heated and melted filling material (7) with the substrate (1); The friction stirring processing head is used to plastically deform the structure of the filling material (7) melted by laser heating through mechanical stirring processing to form a stirring-processed filling material (8).

7. The device according to claim 6, characterized in that The device also includes: A pre-cleaning device is used for pre-cleaning the surface of a substrate (1); wherein the pre-cleaning includes grinding to remove burrs and removing oil stains.

8. The device according to claim 7, characterized in that The filling material block (4) is a cylindrical block obtained by hot pressing a uniformly mixed powder of yttrium oxide rare earth oxide particles and titanium-based metal.

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