CN112170844A - Method for repairing metal part by using mud model protected laser additive - Google Patents
Method for repairing metal part by using mud model protected laser additive Download PDFInfo
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- CN112170844A CN112170844A CN202011194687.9A CN202011194687A CN112170844A CN 112170844 A CN112170844 A CN 112170844A CN 202011194687 A CN202011194687 A CN 202011194687A CN 112170844 A CN112170844 A CN 112170844A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a method for repairing a metal part by using a laser additive protected by a mud model, which is characterized by comprising the following steps of: 1) cleaning and drying the surface of the metal part to be repaired, and measuring the size and analyzing the appearance of the metal part to be repaired; 2) manufacturing a mud model with a proper size; 3) tightly attaching the metal part to be repaired to the mud model; 4) slotting the top of the mud model; 5) the mud model is closely contacted with the metal part and the slotted part, and copper foil pasting treatment is carried out; 6) powder is spread on the slotted part, and laser cladding treatment is carried out; 7) and finishing the cladding layer formed in the step 6). The invention has the beneficial effects that: the mud model has good plasticity and can be tightly attached, and the mud model contains water, so that the evaporation of water can absorb a large amount of heat, and the influence of heat input on the base material is reduced.
Description
Technical Field
The invention relates to the technical field of laser cladding, in particular to a method for repairing a metal part by using a mud model protected laser additive.
Background
The development of modern society is not independent of the use of machinery, and various failure problems inevitably occur in the long-term use process of metal, and most of mechanical failures are caused by the damage of metal parts. Metal parts with different shapes can cause damages with different degrees and different forms due to long-term use and the influence of different working environments, and easily cause the problems of low mechanical working efficiency, failure occurrence, even mechanical damage and the like. Particularly, when the metal part works in environments with high temperature, strong corrosivity, large abrasion degree and the like, the manufacturing cost is high, and the manufacturing difficulty is high, once the metal part is damaged, the resource waste can be caused, so that a repair technology with high precision and small loss is needed, and the cost is saved. The existing repair means are almost all clamped by utilizing a machined mould, some metal parts have complicated shapes, are curved surfaces and are not single regular shapes, and if the metal parts are clamped by utilizing the machined mould, the mould which is tightly attached to the parts is difficult to machine. If the fit is not good, substantial reflow of the substrate may result. The mud model has good plasticity and can be tightly attached, and the mud model contains water, so that the evaporation of the water can absorb a large amount of heat, and the influence of heat input on the base material is reduced, thereby avoiding the trouble of processing a die, saving the cost and reducing the remelting on the base material.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for repairing a metal part by using laser additive protected by a slurry, which is used for repairing and remanufacturing a worn metal part, recovering the performance and the quality of the metal part, prolonging the service life of the metal part, reducing the waste of cost and resources and reducing the consumption of energy.
The technical scheme of the invention is as follows:
a method for repairing a metal part by using a mud-model protected laser additive is characterized by comprising the following steps:
1) cleaning and drying the surface of the metal part to be repaired, and measuring the size and analyzing the appearance of the metal part to be repaired;
2) manufacturing a mud model with a proper size;
3) tightly attaching the metal part to be repaired to the mud model;
4) slotting the top of the mud model;
5) the mud model is closely contacted with the metal part and the slotted part, and copper foil pasting treatment is carried out;
6) powder is spread on the slotted part, and laser cladding treatment is carried out;
7) and finishing the cladding layer formed in the step 6).
The method for repairing the metal part by using the laser additive protected by the mud model is characterized by comprising the following steps of: in the step 1), if the shape of the metal part is regular, the size of the metal part is L + X, W + X, H + X, wherein L, W, H is the length, width and height of the finished metal part, and X is the increment of the length, width and height of the finished metal part; if the metal part is irregular, the distance difference x between the highest point and the lowest point and the distance y between the leftmost side and the rightmost side of the metal part are measured.
The method for repairing the metal part by using the laser additive protected by the mud model is characterized in that in the step 2), the mud model with the volume more than one half of the volume of the finished product of the metal part is manufactured according to the size data measured in the step 1), so that the surface of the mud model is smooth, and the water content of the mud model is moderate.
The method for repairing the metal part by using the laser additive protected by the mud model is characterized in that in the step 3), the manufactured mud model is cut into two mud models with the same size by using an art designer, the metal part is clamped between the two mud models, and then the metal part is modified to ensure that the two mud models are tightly attached.
The method for repairing the metal part by using the laser additive protected by the mud model is characterized in that in the step 4), the repairing position of the surface of the metal part to be repaired is found, a groove is formed from the top of the mud model by using an art knife, the size and the shape of the groove are matched with those of the repairing position to the greatest extent, so that the height difference between the surface to be repaired and the surface of the mud model is kept, and the surface to be repaired and the surface of the mud model are reserved for powder paving.
The method for repairing the metal part by using the laser additive protected by the mud mask is characterized in that in the step 5), the mud mask and the metal part are separated to ensure the smoothness of the mud mask of the joint surface, the copper foil is adhered to the joint part of the mud mask and the metal part and the inner wall of the notch, then the copper foil and the metal part are combined again, the copper foil and the copper foil are tightly jointed again, and no gap exists.
The method for repairing the metal part by using the laser additive protected by the mud mask is characterized in that in the step 6), the powder is uniformly spread in the opened groove, the powder is scraped to be flat by using a scraper, the flatness of the powder is guaranteed to the greatest extent, and then laser cladding is carried out.
The method for repairing the metal part by using the laser additive protected by the mud mask is characterized in that in the step 6), when the cladding layer formed in the step 5) is subjected to finish machining, the worn size is repaired, the size of the metal part is restored to be the qualified finished size, and excessive machining is avoided.
The method for repairing the metal part by using the laser additive protected by the mud range is characterized in that the range of the size X is 0.5-2 mm.
The method for repairing the metal part through the laser additive protected by the mud model is characterized in that the width d of the groove in the top of the mud model is 0.5-1mm, and the height difference h between the top of the mud model and the top of the metal part is 0.5-2 mm.
The invention has the beneficial effects that: the mud model has good plasticity and can be tightly attached, and the mud model contains water, so that the evaporation of water can absorb a large amount of heat, and the influence of heat input on the base material is reduced. The copper foil is covered, so that the influence of steam generated by the contact part of the metal part and the mud range on a deposition layer is avoided, the steam is discharged from the back of the copper foil, a molten pool generated by laser cladding is not blown away, and the remelting of a base material is reduced as much as possible while the effective material increase of the metal part in any shape is realized.
Drawings
Fig. 1 is a schematic process flow diagram of the present scheme.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
As shown in fig. 1, a technology for repairing a metal part by using a mud-model protected laser additive includes the following steps:
step S1: and (4) carrying out size measurement and appearance analysis on the metal part to be repaired. Firstly, the surface of a metal part to be repaired is cleaned, and the surface is washed to remove the surface sink and float, so that the subsequent laser cladding is facilitated. By measuring the size and the appearance of the metal part and analyzing, the size and the appearance of the part can be intuitively known, and preparation is made for the next step of manufacturing the mud model.
Step S2: and manufacturing a mud model with a proper size. Through the measurement of the previous step, the size of the part is roughly known, and a proper mud model is manufactured for wrapping. Because the metal parts are clamped by the two mud models, the appearance analysis of the parts is very important, the size of the mud model is suitable and can be realized without being too large, the manufacture of the mud model is as regular as possible and can be modified by an art knife so as to facilitate the subsequent grooving and powder laying treatment, the upper part is as flat as possible, and the consistency of the powder thickness during powder laying is ensured. The moisture in the mud model is kept moderate, not too much nor too little.
Step S3: and (5) slotting the top of the mud model. The mud model finished product in the step S2 is required to be regular. And (3) tightly attaching the mud model to the metal part, and slotting on the mud model and the surface of the metal part to be repaired. When the groove is formed, the groove is formed as finely and accurately as possible at the joint position of the two parts by using an art designing knife. A height difference is reserved between the surface to be repaired and the mud range, so that powder is conveniently paved during laser cladding.
Step S4: and (3) carrying out copper foil pasting treatment on a tight contact part of the metal part including a slotted part. The mud range and the metal part are carefully separated, the moisture of the mud range is moderate, the mud range of a contact part is adhered to the part when being separated too much, and the mud range and the part are not tightly attached too little. After separation, the copper foil is attached to the contact surface part of the mud range and the metal part, including the slotted part, on one hand, the slotted part is small, the powder spreading amount is small, water in the mud range can be caused to dip and dye powder, on the other hand, the heat of laser during laser cladding can be transmitted to the mud range through a small amount of powder, and the water in the mud range absorbs heat and is vaporized to blow away a molten pool.
Step S5: and spreading powder on the slotted part, and carrying out laser cladding treatment. The powder is kept smooth as much as possible during powder spreading.
Step S6: the cladding layer formed in step S5 is subjected to finishing processing. And repairing the worn size, and recovering the size of the metal part to the qualified finished product size to avoid excessive processing.
Example 2:
in addition to the above embodiments, in this embodiment, in step S1, if the shape of the metal part is regular, the dimensions thereof are L + X, W + X, H + X, wherein L, W, H is the length, width, and height of the finished metal part, X is the increment of the length, width, and height of the finished metal part, and if the metal part is irregular, the distance differences X and y between the highest point and the lowest point, and between the leftmost side and the rightmost side are measured; in the step S3, the width of the slotting process on the top of the mud mold is d, which is not too large, and the height difference h between the top of the mud mold and the top of the metal part is determined according to specific conditions; in the step S1, the size X ranges from 0.5 mm to 2 mm; in the step S3, the width d of the slot is 0.5-1mm, and the height difference h is 0.5-2 mm.
Example 3:
on the basis of the above embodiment, in this embodiment, the metal part with a regular shape is repaired, specifically including the following steps:
step S1: cleaning and drying the surface of the metal part to be repaired; and (4) measuring the size of the metal part to be repaired, and recording the measurement data.
Step S2: manufacturing a mud model which is more than one half of the volume of a finished metal part product according to measured size data, ensuring that the surface of the mud model is smooth and the moisture of the mud model is moderate, cutting the manufactured mud model which is more than one half of the volume of the finished metal part product into two mud models with the same size by using an art designer, clamping the metal part between the two mud models, and then modifying to ensure that the two mud models are tightly attached.
Step S3: slotting the surface to be repaired of the metal part and the contact part of the mud model, slotting a 0.5-1mm slot at the tightly jointed part of the surface to be repaired and the mud model by an art designer, and slotting both sides to ensure the fineness and the accuracy as much as possible. Keeping the height difference of 0.5-2mm between the surface to be repaired and the surface of the mud model, reserving the mixture for powder paving, and setting the specific height difference according to the requirement.
Step S4: carefully separate the mud model and metal parts, guarantee the level and smooth of laminating face mud model, paste the copper foil at the two combination position, including the groove of opening, then combine the two again, this is to let both closely laminate once more, can not have the gap.
Step S5: and uniformly spreading the powder in the opened groove, and scraping the powder by using a scraper to ensure the flatness of the powder as much as possible. And then carrying out laser cladding. The laser head is controlled by the mechanical arm to fix a point, a laser spot is ensured to be on a surface to be repaired when the point is fixed, and then the laser head is controlled by the mechanical arm to move once, so that a path is ensured to be error-free. And finally, opening protective gas for laser cladding.
Step S6: and performing finish machining on the cladding layer according to requirements, repairing the worn size, recovering the size of the metal part to the qualified finished product size, and avoiding excessive machining.
Example 4:
on the basis of the above embodiment, in this embodiment, the repair of the metal part with irregular shape and radian is performed by the following specific steps:
step S1: cleaning and drying the surface of the metal part to be repaired; and (3) measuring the size of the metal part to be repaired, mainly measuring the distance difference between the lowest point and the highest point and the distance difference between the leftmost side and the rightmost side, and recording the measurement data.
Step S2: manufacturing a mud model which is more than one half of the volume of a finished metal part product according to measured size data, ensuring that the surface of the mud model is smooth and the moisture of the mud model is moderate, cutting the manufactured mud model which is more than one half of the volume of the finished metal part product into two mud models with the same size by using an art designer, clamping the metal part between the two mud models, and then modifying to ensure that the two mud models are tightly attached.
Step S3: slotting the surface to be repaired of the metal part and the contact part of the mud model, slotting a 0.5-1mm slot at the tightly jointed part of the surface to be repaired and the mud model by an art designer, and slotting both sides to ensure the fineness and the accuracy as much as possible. At the moment, the radian of the metal part is noticed, and the width of the groove of the radian part is ensured to be consistent. Keeping the height difference of 0.5-2mm between the surface to be repaired and the surface of the mud model, reserving the mixture for powder paving, and setting the specific height difference according to the requirement.
Step S4: carefully separate the mud model and metal parts, guarantee the level and smooth of laminating face mud model, paste the copper foil at the two combination position, including the groove of opening, then combine the two again, this is to let both closely laminate once more, can not have the gap.
Step S5: and uniformly spreading the powder in the opened groove, and scraping the powder by using a scraper to ensure the flatness of the powder as much as possible. And then carrying out laser cladding. The laser head is controlled by the mechanical arm to fix a point, three points are adopted for fixing the point, a laser spot is ensured to be on a surface to be repaired at the fixed point, and then the mechanical arm is used for controlling the laser head to move for a plurality of times, so that the path is ensured to be free of errors. And finally, opening protective gas for laser cladding.
Step S6: and performing finish machining on the cladding layer according to requirements, repairing the worn size, recovering the size of the metal part to the qualified finished product size, and avoiding excessive machining.
In this embodiment, other undescribed contents are the same as those in the above embodiment, and thus are not described again.
The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.
Claims (10)
1. A method for repairing a metal part by using a mud-model protected laser additive is characterized by comprising the following steps:
1) cleaning and drying the surface of the metal part to be repaired, and measuring the size and analyzing the appearance of the metal part to be repaired;
2) manufacturing a mud model with a proper size;
3) tightly attaching the metal part to be repaired to the mud model;
4) slotting the top of the mud model;
5) the mud model is closely contacted with the metal part and the slotted part, and copper foil pasting treatment is carried out;
6) powder is spread on the slotted part, and laser cladding treatment is carried out;
7) and finishing the cladding layer formed in the step 6).
2. The method for repairing metal parts by using the mud-model protected laser additive, according to claim 1, is characterized in that: in the step 1), if the shape of the metal part is regular, the size of the metal part is L + X, W + X, H + X, wherein L, W, H is the length, width and height of the finished metal part, and X is the increment of the length, width and height of the finished metal part; if the metal part is irregular, the distance difference x between the highest point and the lowest point and the distance y between the leftmost side and the rightmost side of the metal part are measured.
3. The method for repairing the metal part by using the laser additive protected by the mud model as claimed in claim 1, wherein in the step 2), the mud model with the volume more than one half of the finished product of the metal part is manufactured according to the size data measured in the step 1), so that the surface of the mud model is smooth, and the water content of the mud model is moderate.
4. The method for repairing the metal part by using the laser additive protected by the mud model as claimed in claim 1, wherein in the step 3), the manufactured mud model is cut into two mud models with the same size by using an art designer, the metal part is clamped between the two mud models, and then the metal part is modified to ensure that the two mud models are tightly attached.
5. The method for repairing metal parts by laser additive material protected by the mud model according to claim 1, wherein in the step 4), a repairing position of the surface of the metal part to be repaired is found, a groove is formed from the top of the mud model by using an art knife, and the size and the shape of the groove are matched with those of the repairing position as much as possible, so that the surface to be repaired and the surface of the mud model are kept to form a height difference and are left for powder paving.
6. The method for repairing a metal part by using the laser additive protected by the slurry film as claimed in claim 1, wherein in the step 5), the slurry film and the metal part are separated to ensure the smoothness of the slurry film of the joint surface, the copper foil is attached to the joint part of the slurry film and the metal part and the inner wall of the notch, then the copper foil and the metal part are combined again, and the slurry film and the metal part are tightly jointed again without a gap.
7. The method for repairing metal parts by using the mud-model protected laser additive, as claimed in claim 1, wherein in the step 6), the powder is uniformly spread in the open groove, the powder is scraped by a scraper to ensure the flatness of the powder as much as possible, and then laser cladding is performed.
8. The method for repairing metal parts by using the mud-model protected laser additive material as claimed in claim 1, wherein in the step 6), when the cladding layer formed in the step 5) is subjected to finish machining, the worn size is repaired, and the size of the metal parts is restored to be an acceptable finished size, so that the excessive machining is avoided.
9. The method for laser additive repair of a metal part using mud protection according to claim 2, wherein the dimension X is in the range of 0.5-2 mm.
10. The method for laser additive repair of the metal part by using the mud model protection as claimed in claim 4, wherein the mud model top slotting width d is 0.5-1mm, and the height difference h between the mud model top and the metal part top is 0.5-2 mm.
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| CN202011194687.9A CN112170844B (en) | 2020-10-30 | 2020-10-30 | Method for repairing metal part by using laser additive protected by mud model |
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| CN202011194687.9A CN112170844B (en) | 2020-10-30 | 2020-10-30 | Method for repairing metal part by using laser additive protected by mud model |
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| US20160338839A1 (en) * | 2009-11-16 | 2016-11-24 | Limacorporate Spa | Elbow replacement apparatus and methods |
| US20110258944A1 (en) * | 2010-04-26 | 2011-10-27 | Marius Radoane | NP-EIFS Non-Permissive Exterior Insulation and Finish Systems concept technology and details |
| CN104568983A (en) * | 2015-01-06 | 2015-04-29 | 浙江工业大学 | Active-omni-directional-vision-based pipeline inside functional defect detection device and detection method |
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