279 results about "Chrome plating" patented technology

The invention discloses a preparation method for ensuring thickness uniformity and form and location tolerance of a coating of a slender shaft, the slender shaft is a slender stepped shaft-shaped part, the preparation method comprises base body processing before plating, hard chromium plating and machining after plating, in the base body processing process stage before plating, a center hole is adopted as a processing reference, finish machining is carried out according to the shape of the part, and the thickness uniformity and the form and location tolerance of the part are guaranteed. It is ensured that the form and position error and dimensional tolerance of the machined part meet the requirements; in the hard chromium plating stage, the non-chromium-plated part is protected, and the chromium-plated part is subjected to hard chromium plating; and in the post-plating machining stage, the center hole is adopted as a machining standard, post-plating rough machining is conducted firstly, then post-plating finish machining is conducted, grinding is conducted to meet the design requirement, and a plated workpiece is obtained. By the adoption of the preparation method, the problem of machining deformation of the slender shaft type structural part is thoroughly solved, the machining performance is stable, the production efficiency is high, special equipment and tools do not need to be configured, and the method is suitable for large-scale production and machining.

The invention is applicable to the technical field of trailer part treatment, and provides a trailer part surface coating treatment process which comprises the following steps: performing high-frequency induction quenching on a trailer ball base body; a copper bottom layer is electroplated on the trailer ball base body, and a bright nickel layer is electroplated on the copper layer; a microcrack nickel layer is electroplated on the bright nickel layer, and a trivalent chromium layer is electroplated on the microcrack nickel layer through a trivalent chromium plating solution; the trailer ball base body electroplated with the trivalent chromium layer is subjected to nanometer hole sealing treatment; applying a layer of polysiloxane or UV (ultraviolet) curing type super-hard transparent finish paint on the surface subjected to hole sealing treatment in a spraying manner; a layer of micro-crack nickel is electroplated on the bright nickel layer, and a micro-crack network of the micro-crack nickel provides a preset and uniform stress release channel for a subsequent chromium layer, so that the internal stress of the chromium layer is dispersed, the brittleness of the chromium layer is greatly reduced, and the impact resistance of the chromium layer is remarkably improved; and a trivalent chromium chromium plating process is adopted to replace traditional hexavalent chromium chromium plating, so that the environmental pollution and toxicity are greatly reduced, and the requirements of modern environmental protection regulations are better met.

The invention provides a device and a method for electroplating chromium on a cylindrical part, one end of a hook in the device is connected with a cathode conductive hoop, and the arc size of the cathode conductive hoop is matched with the size of a workpiece; the positioning block is connected with the hook and used for fixing the upper end of a workpiece, the size of the positioning block is matched with the inner diameter of the workpiece, and the cathode conductive hoop and the positioning block jointly fix the workpiece and enable the workpiece to be kept perpendicular; the positioning ring sleeves the upper end of the workpiece, and the arc size is matched with the outer diameter of the workpiece; one end of the connecting rod is fixed on the positioning ring, the other end is connected with the anode ring, and the height position of the anode ring is matched with a workpiece plating part; one end of the conductive wire is connected with the pull rod, and the other end of the conductive wire is connected with the conductive clamp; and the hook is connected with a cathode of an external tank body. According to the invention, the uniform thickness of the coating of the workpiece can be ensured, the electroplating time is shortened, and the grinding operation is cancelled.

According to the method for locally plating the chromium on the metal surface of the part, the metal surface of the part comprises a surface B needing to be plated with the chromium and a surface A which is adjacent to the surface B and does not need to be plated with the chromium, and a groove is formed between the surface B and the surface A to separate the surface B and the surface A; before electroplating, a non-ferrous metal sheet is tightly bonded to the A face through insulation paste so that the A face can be shielded by the non-ferrous metal sheet, and insulation protection is conducted on the other non-plated faces needing to be protected through insulation protection materials; and the surface B is soaked in electroplating liquid, and electroplating treatment is conducted after electrification. According to the method, non-plating surface protection is achieved, the current density distribution condition of the chromium plating surface is improved, the obtained chromium plating surface is smooth and fine, and the edge is free of the wavy defect; compared with a traditional insulating material, the tool clamp is low in cost, easy and convenient to operate and high in manufacturing qualification rate.

The invention discloses a weaving machine metal part with a low-friction coating and a manufacturing method of the weaving machine metal part, and belongs to the technical field of textile machinery. A body is subjected to heat treatment, magnetic flow grinding, alkaline degreasing, acid activation, ultrasonic cleaning and plasma activation, then a chromium electroplating transition layer or a chemical plating Ni-P transition layer is applied, suspension liquid spraying or powder spraying or dipping is used, sintering curing is cooperated, a PTFE self-lubricating layer is applied, and the self-lubricating composite material is obtained. And finally, the compact Ni / Cr-PTFE-based composite coating is formed on the metal part of the weaving machine. The PTFE self-lubricating layer provides an extremely low friction coefficient, and yarn abrasion and part temperature rise are remarkably reduced; and the Ni / Cr transition layer greatly enhances the bonding strength of the PTFE layer and the steel substrate, and effectively prevents stripping and micro-cracking of the coating in high-speed weaving, so that effective protection of high-performance fibers is synchronously realized, and the service life of parts is remarkably prolonged.

The invention relates to an intelligent roller grinding method for producing high-surface-grade strip steel. The intelligent roller grinding method comprises the steps that S1, the surface of a roller is plated with chromium; s2, a model approximator of the relation between the roller surface roughness and the grinding process state parameters is established; wherein the grinding process state parameters comprise the roller speed, the grinding depth and the grinding wheel speed; and intelligent roughness identification is achieved by optimizing state parameters in the grinding process. According to the method, the surface roughness of the roller is predicted online by establishing the roughness and grinding process state parameters, so that high-quality and high-efficiency production of cold-rolled high-grade surface products is supported, and it is guaranteed that a unit operates stably and the product quality meets the requirement.

The invention belongs to the technical field of metal surface treatment, and discloses an electroplating additive suitable for a steel and alloy surface bright wear-resistant corrosion-resistant hexavalent chromium coating, which is characterized by comprising an organic compound, an inorganic acid, a metal inorganic compound and water, the organic compound comprises a mixture of a fluorine-free compound and a fluorine-containing compound. The method can be widely applied to decorative chromium plating and functional hard chromium plating, the electroplating temperature is 40-70 DEG C, the electroplating time of the decorative chromium plating is 1-10 min, the electroplating time of the hard chromium plating is 20 min or above, the hardness can reach 900 HV or above, the glossiness of the surface of a workpiece can be kept through the decorative plating and the hard chromium plating, the current efficiency can reach about 23%, and the service life of the workpiece is prolonged. The current use requirements of high efficiency, stability and environmental protection are met, and the market prospect is good.

A cooktop according to one embodiment of the present disclosure may include a cooktop body, a ceramic glass disposed on the upper part of the cooktop body and having a through-hole formed in a part thereof, a bracket disposed on the through-hole, a glass member coupled to the bracket so as to be disposed within the through-hole, and a display device disposed on the lower side of the glass member. The bracket may include a metal member and a chrome coating layer coated on the metal member.

The invention relates to the technical field of plasma injection, and discloses a plasma beam injection system in a chromium plating machine, which comprises an electroplating bin, a bin door matched with the electroplating bin is arranged on one side of the surface of the electroplating bin, and a workpiece clamping mechanism is arranged in the electroplating bin and is used for clamping and fixing a workpiece and driving the workpiece to rotate while revolving. Plasma beam emitting mechanisms are arranged on the two sides of the inner wall of the electroplating bin and used for emitting plasma beams. According to the plasma spraying device, the plasma beam can cover the surface of the workpiece without dead angles, the problems of spraying leakage and stacked spraying caused by single movement are effectively avoided, a bidirectional spraying pattern can be formed, the coating uniformity and the coating bonding strength are improved, and therefore the spraying requirement of the workpiece can be better met.

This invention belongs to the field of nuclear power control rod processing technology, specifically relating to a chromium plating method and a continuous-pass chromium plating apparatus for ultra-long, ultra-fine, thin-walled cladding tubes used in nuclear power control rods. The chromium plating method includes pretreatment and chromium plating treatment. The pretreatment includes degreasing and cleaning the ultra-long, ultra-fine, thin-walled cladding tube. The chromium plating treatment is a continuous-pass chromium plating process, in which the pretreated cladding tube is continuously passed horizontally and at a uniform speed along its axial direction through at least one chromium plating tank. The cladding tube is supported by a support structure as it passes through each chromium plating tank, maintaining horizontal linear movement. Within each chromium plating tank, an annular anode surrounds the movement path of the cladding tube, and a pulsed power supply applies a cathode current to the cladding tube for pulse electroplating. This invention, by employing a uniform-speed continuous-pass chromium plating method and using an annular anode, ensures that the chromium plating time and current conditions are consistent along the entire axial length of the workpiece.

The application discloses a kind of automatic overturning type automobile interior chrome plating equipment and process, wherein, the chrome plating equipment includes chrome plating box, overturning mechanism and support structure;Overturning mechanism includes overturning frame, and both ends of overturning frame are provided with shaft;Support structure includes two support assemblies and two separation structures, two support assemblies are respectively arranged at the two sides of overturning frame, support assembly includes mounting bracket, support net, multiple magnetic attraction components and limiting rod, support net is arranged on mounting bracket, multiple magnetic attraction components are arranged on support net, limiting rod has multiple, limiting rod uses metal material that can be adsorbed on support net by magnetic attraction component, separation structure is connected with the mounting bracket in two support assemblies, and separation structure is used to control the distance between two mounting brackets.The application sets overturning mechanism, support assembly and separation structure, so as to ensure that the automobile interior after overturning can be fully contacted with electroplating liquid, and the chrome plating effect is guaranteed.

The utility model discloses a car lamp chrome-plated decoration strip injection mold, which comprises a base, an upper mold and a lower mold assembly, the lower mold assembly comprises two lower mold bodies, and the two lower mold bodies are fixedly connected through a connecting block, and the utility model relates to the technical field of injection molds. According to the injection mold for the chromium-plated decoration strip of the car lamp, through mutual cooperation of a stabilizing rod, a transverse plate, a first inclined block, an ejector rod, a first spring, a vertical rod, a telescopic rod, a second inclined block and a second spring, after injection molding is completed, the upper mold body and the lower mold body are demolded, and in the moving process of the lower mold body, the telescopic rod is extruded, so that the lower mold body is demolded; the ejector rod in one lower mold body can make upward contact with the decoration strip subjected to injection molding and eject the decoration strip subjected to injection molding out, when the other lower mold body is subjected to injection molding, the automobile lamp chromium-plated decoration strip subjected to injection molding of one lower mold body can be taken out, time and labor cost are saved, the production process is smoother, and the overall production efficiency is improved.

The utility model provides a liquid expansion mandrel fixing device for processing a hard chromium plated ball, which belongs to the technical field of hard chromium plated ball processing, and comprises a mandrel main body, and the inner part of the mandrel main body is divided into cavities and is used for realizing uniform expansion; a filling hole is formed in one side of the core shaft main body and is used for filling a hydraulic medium into the core shaft main body; a sealing screw is arranged at an opening of the filling hole; an expansion chamber and a compression chamber are arranged in an inner cavity of the mandrel body, the compression chamber is arranged on one side of a center shaft of the mandrel body, and a linkage structure is arranged in the compression chamber and used for clamping a ball. The utility model provides a liquid expansion mandrel fixing device for processing a hard chromium plated ball, which can solve the problems that the clamping force is concentrated on a local area and a plating layer is easy to crush due to the single-cavity design of the existing liquid expansion mandrel.

The present invention relates to the use of a trivalent chrome plating bath composition for the electrodeposition of a hard chrome layer with a thickness of 1 µm or more, the composition comprising (A) trivalent chromium ions in an amount of 5-40 g / l, (B) at least one anion selected from sulfate, chloride, bromide and methanesulfonate, (C) at least one carboxylate ion selected from formate and acetate, (D) at least one buffer substance selected from ammonia, boric acid, carboxylic acids with 2 to 8 carbon atoms other than component (C) and salts thereof, and aluminium salts, and (E) 0.01 to 100 g / l of at least one specific compound which comprises a sulfonate group and a sulfide or disulfide group. Other aspects of the invention relate to a hard chrome plating process, a hard chrome plating layer and a hard chrome plated article.

The invention discloses a method for preparing a hydrophobic coating on an electroplated chromium surface, which comprises the following steps: adding dispersion liquid of nano particles into chromium plating liquid to obtain composite chromium plating liquid, and electroplating a workpiece by using the composite chromium plating liquid to obtain a chromium plating layer, the nano particles are at least one of silicon dioxide, silicon carbide or silicon nitride, silica sol and silicon-fluorine-containing resin are sequentially applied to the chromium plating layer, and the hydrophobic coating is obtained after drying. According to the invention, the nano particles are doped with the electroplated chromium, the chromium plating layer contains Si, so that Si-OH bonds are formed on the surface of the electroplated chromium, silica sol is used as a silicon transition layer, the lower part of the silica sol can form Si-O-Si chemical bonds with Si-OH in the chromium plating layer, and the upper part of the silica sol can form Si-O-Si chemical bonds with Si-OH bonds in silicon-containing fluorine resin; and the binding force of the hydrophobic coating and the chromium plating layer is greatly improved.

METHOD AND PROCESS FOR VACUUM PLATING FOR BONDING PLASTICS The invention provides a method and process for vacuum plating for bonding plastics. By uniformly applying a semi-transparent primer to the back of the plastic substrate, the invention improves adhesion and cohesion between the vacuum plating and the substrate, preventing the plating from detaching or puckering during prolonged use. By using an opaque black paint as a chrome- or aluminized-type vacuum plating, the invention effectively prevents light leakage. The interposition of the semi-transparent primer between the plastic substrate and the vacuum plating enhances adhesion and cohesion, as well as resistance to hot and humid environments.Adding a protective varnish to the back increases the reliability of the bond while eliminating traces of the glue layer. Figure to be published with the abbreviation: Figure 1.

The invention relates to the technical field of mechanical manufacturing, and discloses a step shaft part chromium plating auxiliary assembly which comprises a chromium plating assembly and a bottom plate, a supporting column is fixed to the top of the bottom plate, an insulating plate is fixed to the surface of the supporting column, a through hole and a containing groove are formed in the insulating plate, and a lead ring is arranged in the containing groove. A top plate is fixed to the ends of the supporting columns, and a hanging frame is fixed to the top of the top plate. The method has the beneficial effects that 1, the coating uniformity is improved, and the time is shortened: a lead ring in an insulating plate accommodating groove and a main anode are jointly connected with a power supply, an auxiliary electric field is formed on a step surface and the bottom end of a rod part, and Cr migration power is supplemented, so that the coating thickness in the area is flush with the middle section of the rod part, and the electroplating time does not need to be prolonged; 2, the protection operation of a non-chromium-plated area is simplified: the base is shielded by the positioning seat and the supporting seat of the supporting assembly respectively, the thin shaft is sleeved by the sealing sleeve under the action of the spring, manual wrapping is not needed, and procedures and time consumption are reduced;

A light guide enabled lamp includes a light guide. A light source positioned at an edge of the light guide directs light generated by energizing the light source throughout a length of the light guide reflective layer disposed on the light guide. A reflective layer is disposed on the light guide. A graphics pattern is formed on the light guide defining nano-scale optic patterns by a surface etching of the light guide. A polymeric material coating is applied over the light source, the light guide and the reflective layer. A coating is applied over the polymeric material coating using one of a wet coating process, a dry coating process, an in-mold injection-compression or lamination film application, and a post molding process.

The invention discloses a piston rod manufacturing technology, and aims to provide a piston rod for a shock absorber of a refitted vehicle and a manufacturing method of the piston rod, the main points of the technical scheme are as follows: the piston rod comprises a rod body structure: a hollow piston rod main body made of 40Cr alloy steel material is adopted, the surface of the piston rod main body is subjected to high-frequency quenching treatment to form a hardening layer, the depth of the hardening layer is 0.5-0.9 mm, and the thickness of the hardening layer is 0.5-0.9 mm; the hardness is 50 to 57 HRC; a microcrack chromium plating layer is further arranged on the surface of the piston rod main body, the thickness of the plating layer is 0.02 + / -0.005 mm, the hardness is 800-1200 HV, and the microcrack density is larger than or equal to 500 strips / cm; the circulating oil liquid adjusting mechanism is a circulating oil liquid adjusting control mechanism integrated in the piston rod body and comprises an adjusting rod valve element coaxial with the piston rod body and an O-shaped sealing ring matched with the adjusting rod valve element, the adjusting rod valve element accurately controls the flow and pressure of oil liquid through axial displacement, and continuous adjustment of damping is achieved; adjusting the input assembly; an additional circulation channel; the invention is suitable for the technical field of piston rod manufacturing.

The utility model relates to the technical field of scraper chains, in particular to an anchoring and transporting scraper chain which comprises a first scraper chain body, a second scraper chain body is arranged on one side of the first scraper chain body, a scraper is installed between the first scraper chain body and the second scraper chain body, and I-shaped reinforcing blocks are fixedly installed at the two side ends of the scraper. The sides, away from the scrapers, of the I-shaped reinforcing blocks are installed on the first scraper chain and the second scraper chain correspondingly, and a plurality of sections of chrome-plated welding abrasion-resistant strips are installed at the bottom ends of the scrapers. The scraper chain is provided with a plurality of sections of S-shaped chromium-plated welding wear-resisting strips, hardness is increased, the scraper chain is more wear-resisting, the service life of the scraper chain is greatly prolonged compared with that of a previous product in a severe working condition environment, the surface of the pin shaft is subjected to chromium-plated treatment, the corrosion resistance is improved while the strength is increased, and the scraper chain can be used in a wet environment. And in the working condition environment with corrosive gas and the like, the risk of corrosive fracture is eliminated, and the service life of the chain is prolonged.

The invention discloses a cleaning composite process method for a deep-hole part before chromium plating. The technological process comprises the steps of preparation before cleaning, body pipe installation, high-pressure rough cleaning, high-pressure hot water cleaning, clamping, hot water cleaning, lead removal, cold water cleaning, chemical deoiling, hot water cleaning, clamp disassembly, hearth wiping with lime, high-pressure fine cleaning, high-pressure hot water cleaning, clamping, cold water cleaning, anodic acid pickling, neutralization and chromium plating. The method can solve the problem that the cleaning quality does not reach the standard before chromium plating of the inner hole of the barrel.

The invention belongs to the technical field of metal material surface treatment, and discloses a production process of a weldable electroplated chromium plate. According to the process, cluster-shaped peak morphology is transferred on the surface of a cold-rolled steel coil through a laser texturing roller, and staged double-layer chromium electroplating is combined, specifically, a discontinuous chromium layer is formed on the top of a micro convex peak through first-time high-current pulse electroplating, and local iron leakage points are reserved; the second low current direct current plating covers an ultrathin continuous chromium film to maintain macro passivation. According to the invention, a composite functional structure with both macroscopic passivation integrity and microcosmic conductive selectivity is constructed on the surface of chromium-plated iron by accurately controlling the microstructure of the surface of a base material and double-layer chromium plating process parameters, so that the technical bottleneck of the chromium-plated plate in resistance welding application is effectively solved, collaborative optimization of weldability and corrosion resistance is realized, and the application range of the chromium-plated plate in resistance welding is widened. And a reliable technical path is provided for comprehensive replacement of chromium-plated iron in the field of metal packaging.

The invention discloses a water electroplating process for a PC / ABS (polycarbonate / acrylonitrile-butadiene-styrene) material thin decorative part. The water electroplating process comprises the following treatment steps: pretreatment; activating treatment: after the surface of the thin decorative part made of the PC / ABS material is roughened, the rough surface of the thin decorative part made of the PC / ABS material is activated, so that the rough surface of the thin decorative part made of the PC / ABS material can accept deposition of plating metal; chemical plating treatment: carrying out chemical nickel plating treatment on the to-be-plated surface of the PC / ABS material thin decorative part; electroplating treatment: carrying out copper plating treatment, nickel plating treatment and chromium plating treatment on the chemical nickel surface of the PC / ABS material thin decorative part; wherein the thickness range of the plated copper is 24-28 [mu] m, the thickness range of the plated nickel is 1-3 [mu] m, and the thickness range of the plated chromium is 0.01-0.04 [mu] m; and post-treatment: carrying out cleaning treatment and drying treatment on the electroplated PC / ABS material thin decorative part to obtain the PC / ABS material thin decorative part. By means of the water electroplating process, the problem that the strength of the PC / ABS material decorating part is poor after water electroplating can be solved.

The invention relates to the technical field of titanium alloy surface treatment, in particular to a surface treatment process for obtaining a wear-resistant and corrosion-resistant titanium alloy workpiece, which comprises the following steps: carrying out sand blasting treatment on the titanium alloy workpiece, placing the titanium alloy workpiece as a cathode in an electrochemical mixed solution to remove an oil film, washing with water, and hydrogenating; after the hydrogenated titanium alloy workpiece is subjected to nickel dipping treatment and serves as a cathode for nickel pre-plating, an anode material and electroplating liquid are replaced for chromium plating of the titanium alloy workpiece; in the electroplating process, the current density of the anode at each sampling moment and the conductivity of the anode and the cathode are analyzed, and the electroplating current at each sampling moment is adjusted; and after electroplating is completed, the titanium alloy workpiece is washed with water and then plated layer stabilization is conducted. The purpose of the invention is to improve the uniformity and corrosion resistance of an electroplated layer.

The invention discloses a chromium coating crack repairing method and device based on high-pressure water repellent filling, and the method comprises the steps: selecting high-pressure gas according to the working or testing pressure of a part, and extruding a water repellent into a crack gap of a chromium coating by using the selected high-pressure gas; in the extrusion process of the water repellent, the water repellent is driven to reciprocate on the surface of the chromium layer of the part, and dynamic infiltration is achieved; after the crack gap is filled with the water repellent, curing of the water repellent on the surface layer and the root is accelerated in a heating mode, the water repellent is prevented from flowing out, and blocking of the crack gap is achieved; and honing the surface of the chromium layer by using a honing device, removing the water repellent on the surface, and improving the surface roughness. Therefore, the water repellent can permeate into the air hole or the root of the crack to fill the whole crack, so that the compactness of the chromium layer and the qualified rate of the air tightness test of the chromium layer are effectively improved.

The invention provides a copper foil surface alkaline chromium plating device, and belongs to the technical field of copper foil surface chromium plating. The device comprises a plating solution storage tank, a plating bath, a trivalent chromium electrolytic bath and a PLC (Programmable Logic Controller) system. The plating solution storage tank is communicated with the electroplating bath through a first pipeline, and the electroplating bath is communicated with the trivalent chromium electrolytic bath through a second pipeline to form a first circulation loop. Through the first circulation loop, recycling of the plating solution and continuous production of electrochromism can be realized. The plating solution storage tank is communicated with the electroplating bath through a first pipeline, the electroplating bath is communicated with the trivalent chromium electrolytic bath through a third pipeline, and the trivalent chromium electrolytic bath is communicated with the plating solution storage tank through a fourth pipeline to form a second circulation loop. Through the second circulation loop, the regeneration of the plating solution can be realized, and the influence of trivalent chromium on electroplating is greatly reduced. The PLC system is electrically connected with a first PH meter and a first electromagnetic valve which are arranged on the fourth pipeline, full-automatic control over regeneration and reuse of the plating solution can be achieved, manual intervention errors are reduced, and production continuity and stability are improved.

A method for manufacturing a plated member according to the present invention comprises: a plating step in which a hard chromium plating film is formed on the surface of a plated member using a plating solution containing trivalent chromium as the main component; and a polishing step or a grinding step in which, after the plating step, abrasive grains crushed under a pressing load of 580 + / -80 mN in a crushing test using the nanoindentation method (ISO 14577) are used to perform the polishing step or the grinding step.

The invention discloses a full-automatic chromium plating system, and relates to the technical field of chromium plating, the full-automatic chromium plating system comprises a system frame, a control panel end and a chromium plating process module, the chromium plating process module is formed by arranging a plurality of process grooves, a crane mechanism is installed on the system frame, the control panel end controls the moving track of the crane mechanism, and the control panel end controls the moving track of the crane mechanism. And through integrated design and programmed control, the quality leap of the chromium plating process is realized. The device has the core beneficial effects that the full-automatic traveling mechanism and the accurate positioning and connecting assembly are taken as the core, so that absolute accuracy and stability of workpiece transmission among multiple complex procedures are ensured, manual operation errors are eliminated fundamentally, and extremely high quality consistency and reproducibility of products are ensured; through an original'bottom chromium-transition chromium-surface chromium 'triple dynamic thickness distribution process, the thickness ratio of each functional layer is intelligently optimized, the binding force, the internal stress and the surface performance can be perfectly balanced under any total thickness requirement, and a top-level coating which is firm in combination and resistant to abrasion and corrosion is produced.

The invention discloses a high velocity oxy-fuel spraying method for a titanium alloy irregular arc surface. The high velocity oxy-fuel spraying method comprises the following steps that S1, the titanium alloy with the irregular arc surface is pretreated; s2, shielding the non-spraying surface of the irregular arc surface titanium alloy pretreated in the S1; s3, carrying out sand blasting treatment on the to-be-sprayed surface of the irregular arc surface titanium alloy subjected to shielding treatment in S2; and S4, the spraying face of the irregular arc face titanium alloy subjected to sand blasting treatment in the S3 is preheated through supersonic flame, spraying is conducted on the spraying face, when the variable cross section of the irregular arc face titanium alloy is met, the distance between a spraying gun and the spraying face is adjusted to be 5-20 mm, meanwhile, the angle of the spraying gun is adjusted to be 70-90 degrees, overall spraying is conducted for 15-20 times, and the final thickness of a coating is 40-80 microns. By means of the method, the uniformity and compactness of the flame spraying coating of the irregular arc surface of the titanium alloy can be guaranteed, and the coating with the wear resistance superior to the function of a chromium plating layer can be obtained.