CN111020451A - Treatment method for galling surface of automobile stamping die - Google Patents
Treatment method for galling surface of automobile stamping die Download PDFInfo
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- CN111020451A CN111020451A CN201911314695.XA CN201911314695A CN111020451A CN 111020451 A CN111020451 A CN 111020451A CN 201911314695 A CN201911314695 A CN 201911314695A CN 111020451 A CN111020451 A CN 111020451A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005507 spraying Methods 0.000 claims abstract description 64
- 239000011248 coating agent Substances 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 29
- 238000007751 thermal spraying Methods 0.000 claims abstract description 17
- 238000005498 polishing Methods 0.000 claims abstract description 16
- 230000008439 repair process Effects 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 239000003779 heat-resistant material Substances 0.000 claims abstract description 8
- 238000007788 roughening Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 8
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 239000004519 grease Substances 0.000 claims abstract description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000005524 ceramic coating Methods 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 12
- 238000005488 sandblasting Methods 0.000 claims description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 239000003350 kerosene Substances 0.000 claims description 8
- 229910001120 nichrome Inorganic materials 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 239000010432 diamond Substances 0.000 claims description 6
- 229910003460 diamond Inorganic materials 0.000 claims description 6
- 230000003746 surface roughness Effects 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 4
- 239000010431 corundum Substances 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 230000036284 oxygen consumption Effects 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000004381 surface treatment Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005121 nitriding Methods 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
- B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/01—Selection of materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Optics & Photonics (AREA)
- Coating By Spraying Or Casting (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
The invention provides a method for processing surface galling of an automobile stamping die, which comprises the following steps: step (1), deplating treatment, step (2), flaw detection and repair: removing grease; step (4), removing rust on the surface of the die, and removing dirt by using laser; step (5), isolating and protecting a non-spraying area by using a heat-resistant material, and fixing the non-spraying area in the spraying area for preheating; step (6), surface roughening: preparing a metal ceramic coating on the surface to be sprayed of the automobile mold by adopting a thermal spraying process, horizontally placing the automobile mold on the ground of a spraying room, and spraying by using a spray gun perpendicular to the surface to be sprayed to form a tungsten carbide coating with the thickness of 0.15-0.30 mm; cooling to normal temperature, removing the heat-resistant material, and treating the surface sealing holes by using a sealing agent; step (9), polishing the thermal spraying coating: the invention has excellent comprehensive properties of surface hardness, wear resistance, corrosion resistance and the like of the processed automobile mould, effectively prolongs the service life of the mould, reduces the mould repairing frequency and reduces the production cost.
Description
Technical Field
The invention relates to the technical field of automobile stamping dies, in particular to a method for processing surface galling of an automobile stamping die.
Background
Due to the application of various novel materials, quality defects such as galling of automobile stamping parts become one of main problems puzzling various host factories, and galling causes the thickness of plates to be thinner, so that the strength of an automobile body can be influenced in severe cases. The napping of the automobile stamping part is mainly shown in the working procedures of stretching, shaping, flanging and the like. The galling is mainly caused by galling generated on a workpiece due to the burrs generated on a die stretching insert, and a tearing phenomenon can be generated if the galling is serious. Galling is mainly caused by insufficient hardness and smoothness of the mold. To overcome the galling defect, a common way is to perform surface treatment on the mold.
At present, the surface treatment method of the automobile mould mainly comprises surface quenching, nitriding, electroplating, TD treatment and the like. As a quenching and nitriding process of the traditional surface treatment, although the cost is lower, the wear resistance of the die can be improved to a certain extent, the requirement on the material is high, and the thermal deformation is easy to cause; the TD treatment is a thermal diffusion method carbide coating treatment, which is a metal carbide coating with a thickness of several micrometers to tens of micrometers formed on the surface of a workpiece through high-temperature diffusion, the coating has extremely high hardness and is metallurgically combined with a parent material, and after the TD treatment, the surface of a die has high hardness and good wear resistance, but the requirements on the die design and the die material are high, the treatment cost is high, the thermal deformation is easy to cause, and the die repair is difficult.
The chromium plating process is widely applied to the surface treatment of the automobile mold at present, the chromium plating layer has good chemical stability and does not act in alkali, sulfide, nitric acid and most of organic acids, but the chromium plating process has obvious defects, wherein the consumption of noble metals is large, the water consumption is large, the processing cost is high, the service life is short, and the environmental pollution is particularly serious.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for treating the surface galling of an automobile stamping die, so as to solve the problems in the background technology.
The technical problem solved by the invention is realized by adopting the following technical scheme: a treatment method for napping the surface of an automobile stamping die comprises the following steps:
performing local deplating treatment on the thermal spraying area, and inspecting by using a spectrometer after deplating;
step (2), flaw detection and repair: flaw detection is carried out, and cracks and sand holes which influence production on the die are smoothed by repair welding oil;
step (3), adopting oxyacetylene flame for baking, and wiping the surface to be sprayed with acetone to remove grease, wherein the surface temperature is controlled within 120 ℃;
step (4), removing rust on the surface of the die, and removing dirt by using laser;
step (5), isolating and protecting a non-spraying area by using a heat-resistant material, and fixing the non-spraying area in the spraying area for preheating;
step (6), surface roughening: carrying out sand blasting coarsening treatment on the surface to be sprayed of the automobile mould, wherein the sand blasting material is white corundum, so that the surface to be sprayed is exposed with homogeneous metal natural color, and the surface roughness is controlled to be Ra7-9 mu m;
preparing a metal ceramic coating on the surface to be sprayed of the automobile mold by adopting a thermal spraying process, horizontally placing the automobile mold on the ground of a spraying room, and spraying by using a spray gun perpendicular to the surface to be sprayed to form a tungsten carbide coating with the thickness of 0.15-0.30 mm;
cooling to normal temperature, removing the heat-resistant material, and treating the surface sealing holes by using a sealing agent;
step (9), polishing the thermal spraying coating: and (3) polishing the spraying area of the automobile die by using a diamond polishing disc with the number of 60-1200 meshes, so that the thickness of the final thermal spraying coating is controlled to be 0.10-0.15mm, and the roughness Ra is less than 0.8 mu m.
The spraying material selected in the step (7): the WC-Cr3C2-NiCr powder has the granularity of 5-20 microns, and comprises the following components in percentage by mass: 45%, Cr3C 2: 25%, NiCr: 25%, balance: fe.
And (5) setting working parameters of the spraying equipment in the step (7): the oxygen consumption is 36-40 m3/h, and the oxygen pressure is 15 kg/h; the aviation kerosene consumption is 18-21L/h, and the aviation kerosene pressure is 10 kg/h; the powder feeding speed is 45-55 g/min.
In the step (7), the spraying distance is 80-200 mm, the spraying angle is 80-90 degrees, the moving speed of the spray gun is 10-30 cm/s, and the total thickness of the coating is controlled between 0.15mm and 0.30mm according to the repair requirement.
And (4) in the step (7), spraying is implemented by combining a manipulator programming automatic mode and a manual mode, different spray gun motion tracks are programmed according to the appearance of the mould to carry out automatic spraying, the R-angle manual spraying is carried out at a turning angle, the spraying is repeatedly and alternately carried out, the surface temperature of the mould is measured and controlled to be lower than 80 ℃ after each spraying, and the uniformity of the thickness of the surface coating is lower than 0.05 mm.
Compared with the prior art, the invention has the beneficial effects that: the method comprises the following steps of firstly, carrying out deplating, flaw detection repairing, baking and laser decontamination pretreatment on the surface of an automobile die, wherein a non-spraying surface is protected by a tool; carrying out sand blasting and coarsening treatment on the surface to be sprayed to expose homogeneous metal natural color and control the surface roughness to Ra7-9 μm; preparing a tungsten carbide coating on a surface to be sprayed by adopting a thermal spraying process, and combining a mechanical programming automatic spraying method and a manual spraying method to implement spraying; and grinding the spraying area by using a diamond polishing disc to control the thickness of the final thermal spraying coating to be 0.10-0.15mm, wherein the roughness Ra is less than 0.8 mu m. The method overcomes the defects of the traditional mould surface treatment method, the surface of the automobile mould treated by the method has excellent comprehensive properties such as hardness, wear resistance, corrosion resistance and the like, the service life of the mould is effectively prolonged, the mould repairing frequency is reduced, and the production cost is reduced.
Detailed Description
In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.
A treatment method for napping the surface of an automobile stamping die comprises the following steps:
performing local deplating treatment on the thermal spraying area, and inspecting by using a spectrometer after deplating;
step (2), flaw detection and repair: flaw detection is carried out, and cracks and sand holes which influence production on the die are smoothed by repair welding oil;
step (3), adopting oxyacetylene flame for baking, and wiping the surface to be sprayed with acetone to remove grease, wherein the surface temperature is controlled within 120 ℃;
step (4), removing rust on the surface of the die, and removing dirt by using laser;
step (5), isolating and protecting a non-spraying area by using a heat-resistant material, and fixing the non-spraying area in the spraying area for preheating;
step (6), surface roughening: carrying out sand blasting coarsening treatment on the surface to be sprayed of the automobile mould, wherein the sand blasting material is white corundum, so that the surface to be sprayed is exposed with homogeneous metal natural color, and the surface roughness is controlled to be Ra7-9 mu m;
preparing a metal ceramic coating on the surface to be sprayed of the automobile mold by adopting a thermal spraying process, horizontally placing the automobile mold on the ground of a spraying room, and spraying by using a spray gun perpendicular to the surface to be sprayed to form a tungsten carbide coating with the thickness of 0.15-0.30 mm; the selected spraying materials are as follows: the WC-Cr3C2-NiCr powder has the granularity of 5-20 microns, and comprises the following components in percentage by mass: 45%, Cr3C 2: 25%, NiCr: 25%, balance: fe; setting working parameters of the spraying equipment: the oxygen consumption is 36-40 m3/h, and the oxygen pressure is 15 kg/h; the aviation kerosene consumption is 18-21L/h, and the aviation kerosene pressure is 10 kg/h; the powder feeding speed is 45-55 g/min; the spraying distance is 80-200 mm, the spraying angle is 80-90 degrees, the moving speed of the spray gun is 10-30 cm/s, and the total thickness of the coating is controlled between 0.15mm-0.30mm according to the repair requirement; spraying is implemented by combining a mechanical arm programming automatic mode and a manual mode, different spray gun motion tracks are compiled according to the appearance of the die to carry out automatic spraying, the turning R angle is manually sprayed, the spraying is repeatedly alternated, the surface temperature of the die is measured and controlled to be lower than 80 ℃ after each spraying, and the uniformity of the thickness of the surface coating is lower than 0.05 mm;
cooling to normal temperature, removing the heat-resistant material, and treating the surface sealing holes by using a sealing agent;
step (9), polishing the thermal spraying coating: and (3) polishing the spraying area of the automobile die by using a diamond polishing disc with the number of 60-1200 meshes, so that the thickness of the final thermal spraying coating is controlled to be 0.10-0.15mm, and the roughness Ra is less than 0.8 mu m.
Example 1
Aiming at the hot spraying treatment of the R corners of male dies B and C columns of the inner plate of a rear door of a certain automobile, the die is made of nodular cast iron Ggg70L, and the surface of the die is subjected to quenching treatment to punch a thick plate of 1.2 mm. The phenomenon of galling of the R corner of the door plate in the die is the original chromium plating process, the oil polish needs to be ground every 300 strokes, and the reject ratio of parts is high. In order to prolong the service life of the die and reduce the fraction defective of parts, the method is adopted to carry out surface treatment on the die and prepare a tungsten carbide coating on the surface of the die, and the method comprises the following specific steps:
(1) preparation before spraying: and (4) carrying out local deplating treatment on the R corners of the male dies B and C columns of the inner plate of the rear door, and inspecting by using a spectrometer after deplating. And performing dye penetrant inspection to ensure that no crack exists, and smoothing cracks and sand hole repair welding oil influencing production on the die. Baking and wiping the surface to be sprayed with acetone to remove grease, removing rust on the surface, removing dirt with laser, and protecting the non-spraying area with a tool;
(2) sand blasting and coarsening: carrying out sand blasting coarsening treatment on the R corners of the columns B and C, wherein the sand blasting material is No. 60 white corundum, so that the surface to be sprayed is exposed to the homogeneous metal natural color, and the surface roughness is controlled to Ra7-9 mu m;
(3) preparing a coating: and preparing the tungsten carbide coating on the surface of the die by adopting a supersonic flame spraying process. The selected spraying materials are as follows: the WC-Cr3C2-NiCr powder has the granularity of 5-20 microns, and comprises the following components in percentage by mass: 45%, Cr3C 2: 25%, NiCr: 25%, balance: fe; setting working parameters of the spraying equipment: the oxygen consumption is 36-40 m3/h, and the oxygen pressure is 15 kg/h; the aviation kerosene consumption is 18-21L/h, and the aviation kerosene pressure is 10 kg/h; the powder feeding speed is 45-55 g/min; the spraying distance is 100mm, the spraying angle is 90 degrees, the moving speed of the spray gun is 10cm/s, and the total thickness of the coating is 0.2 mm. Before spraying, the surface of the mould is preheated by the flame of a spray gun for one time, and then spraying is carried out, wherein the surface temperature of the mould is less than 80 ℃.
(4) Polishing treatment: the spraying area is roughly ground by using a diamond polishing disc with the number of 200 plus 400 meshes, and then is finely polished by using a diamond polishing sheet with the number of 600 plus 800, so that the thickness of the final thermal spraying coating is controlled to be 0.10mm, and the roughness Ra is less than 0.8 mu m.
The tungsten carbide coating is prepared on the male dies B and C post R corners of the automobile rear door inner plate by adopting the method, and after polishing treatment, the surface coating has high hardness HV1150 and good comprehensive performances of wear resistance, corrosion resistance and the like, the problem of galling of the die is effectively solved, the number of times of oil polishing is reduced from 300 times to 3000 times, the service life is prolonged from 100000 times to 400000 times, and the service life of the die is prolonged by 4 times.
The invention overcomes the defects of the traditional mould surface treatment method, and the automobile mould treated by the method has excellent comprehensive properties of surface hardness, wear resistance, corrosion resistance and the like, effectively prolongs the service life of the mould, reduces the mould repairing frequency and reduces the production cost.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A treatment method for napping the surface of an automobile stamping die is characterized by comprising the following steps: the method comprises the following steps:
performing local deplating treatment on the thermal spraying area, and inspecting by using a spectrometer after deplating;
step (2), flaw detection and repair: flaw detection is carried out, and cracks and sand holes which influence production on the die are smoothed by repair welding oil;
step (3), adopting oxyacetylene flame for baking, and wiping the surface to be sprayed with acetone to remove grease, wherein the surface temperature is controlled within 120 ℃;
step (4), removing rust on the surface of the die, and removing dirt by using laser;
step (5), isolating and protecting a non-spraying area by using a heat-resistant material, and fixing the non-spraying area in the spraying area for preheating;
step (6), surface roughening: carrying out sand blasting coarsening treatment on the surface to be sprayed of the automobile mould, wherein the sand blasting material is white corundum, so that the surface to be sprayed is exposed with homogeneous metal natural color, and the surface roughness is controlled to be Ra7-9 mu m;
preparing a metal ceramic coating on the surface to be sprayed of the automobile mold by adopting a thermal spraying process, horizontally placing the automobile mold on the ground of a spraying room, and spraying by using a spray gun perpendicular to the surface to be sprayed to form a tungsten carbide coating with the thickness of 0.15-0.30 mm;
cooling to normal temperature, removing the heat-resistant material, and treating the surface sealing holes by using a sealing agent;
step (9), polishing the thermal spraying coating: and (3) polishing the spraying area of the automobile die by using a diamond polishing disc with the number of 60-1200 meshes, so that the thickness of the final thermal spraying coating is controlled to be 0.10-0.15mm, and the roughness Ra is less than 0.8 mu m.
2. The method for roughening the surface of the automobile stamping die according to claim 1, wherein the method comprises the following steps: the spraying material selected in the step (7): the WC-Cr3C2-NiCr powder has the granularity of 5-20 microns, and comprises the following components in percentage by mass: 45%, Cr3C 2: 25%, NiCr: 25%, balance: fe.
3. The method for roughening the surface of the automobile stamping die according to claim 1, wherein the method comprises the following steps: and (5) setting working parameters of the spraying equipment in the step (7): the oxygen consumption is 36-40 m3/h, and the oxygen pressure is 15 kg/h; the aviation kerosene consumption is 18-21L/h, and the aviation kerosene pressure is 10 kg/h; the powder feeding speed is 45-55 g/min.
4. The method for roughening the surface of the automobile stamping die according to claim 1, wherein the method comprises the following steps: in the step (7), the spraying distance is 80-200 mm, the spraying angle is 80-90 degrees, the moving speed of the spray gun is 10-30 cm/s, and the total thickness of the coating is controlled between 0.15mm and 0.30mm according to the repair requirement.
5. The method for roughening the surface of the automobile stamping die according to claim 1, wherein the method comprises the following steps: and (4) in the step (7), spraying is implemented by combining a manipulator programming automatic mode and a manual mode, different spray gun motion tracks are programmed according to the appearance of the mould to carry out automatic spraying, the R-angle manual spraying is carried out at a turning angle, the spraying is repeatedly and alternately carried out, the surface temperature of the mould is measured and controlled to be lower than 80 ℃ after each spraying, and the uniformity of the thickness of the surface coating is lower than 0.05 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911314695.XA CN111020451A (en) | 2019-12-19 | 2019-12-19 | Treatment method for galling surface of automobile stamping die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911314695.XA CN111020451A (en) | 2019-12-19 | 2019-12-19 | Treatment method for galling surface of automobile stamping die |
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| Publication Number | Publication Date |
|---|---|
| CN111020451A true CN111020451A (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911314695.XA Pending CN111020451A (en) | 2019-12-19 | 2019-12-19 | Treatment method for galling surface of automobile stamping die |
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|---|---|
| CN (1) | CN111020451A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114990549A (en) * | 2022-05-30 | 2022-09-02 | 高红霞 | Surface galling device and method for automobile stamping die casting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233167A (en) * | 2013-06-21 | 2014-12-24 | 上海宝钢工业技术服务有限公司 | Modification treatment method for surface of automobile die through thermal spraying |
| CN109182948A (en) * | 2018-11-16 | 2019-01-11 | 佛山市南海区科琎精密机械有限公司 | A kind of supersonic flame spraying technique |
| CN109321921A (en) * | 2018-09-28 | 2019-02-12 | 东莞优诺电子焊接材料有限公司 | A kind of decoating liquid and preparation method thereof of automobile die PVD |
| CN109433742A (en) * | 2018-12-04 | 2019-03-08 | 许昌市淮海机械制造有限公司 | A kind of automobile die derusting device |
-
2019
- 2019-12-19 CN CN201911314695.XA patent/CN111020451A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233167A (en) * | 2013-06-21 | 2014-12-24 | 上海宝钢工业技术服务有限公司 | Modification treatment method for surface of automobile die through thermal spraying |
| CN109321921A (en) * | 2018-09-28 | 2019-02-12 | 东莞优诺电子焊接材料有限公司 | A kind of decoating liquid and preparation method thereof of automobile die PVD |
| CN109182948A (en) * | 2018-11-16 | 2019-01-11 | 佛山市南海区科琎精密机械有限公司 | A kind of supersonic flame spraying technique |
| CN109433742A (en) * | 2018-12-04 | 2019-03-08 | 许昌市淮海机械制造有限公司 | A kind of automobile die derusting device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114990549A (en) * | 2022-05-30 | 2022-09-02 | 高红霞 | Surface galling device and method for automobile stamping die casting |
| CN114990549B (en) * | 2022-05-30 | 2024-01-12 | 东莞海雅特汽车科技有限公司 | Surface roughening treatment device and method for automobile stamping die casting |
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