CN1312176A

CN1312176A - Production process of stainless steel wheel for motor vehicle

Info

Publication number: CN1312176A
Application number: CN 00110938
Authority: CN
Inventors: 陈济瑞; 王行胜; 宋志俭; 张建华
Original assignee: JINING WHEEL WORKS SHANDONG
Current assignee: JINING WHEEL WORKS SHANDONG
Priority date: 2000-03-08
Filing date: 2000-03-08
Publication date: 2001-09-12
Anticipated expiration: 2020-03-08
Also published as: CN1140424C

Abstract

The production process of stainless steel wheel for motor vehicle relates to production process of rim and spoke and press-assembling process of both them. The technological process of rim includes the procedures of blanking, ringing, butt welding, scraping slag, flaring, first roll cambering, second roll cambering, punching air valve hole, polishing, surface treatment to feed in into press assembling line: and technological process of spoke can be divided into stamping process and spinning process, in which the stamping process includes the steps of blanking, 1-3 times forming, combination punching, squeezing screw hole, punching air hole, squeezing air hole, machining, surface treatment and feeding it into press-assembling line; spinning process substitudes the 1-3 times forming procedure by its forming procedure, and other procedures are identical to that of stamping process. At the press-assembling line the rim and and spoke are welded into wheel assembly.

Description

Production process of stainless steel wheel for motor vehicle

The present invention relates to a kind of vehicle wheels production technology.

Existing wheel can be divided into steel wheel, aluminum-alloy wheel and steel aluminium built-up wheel by its manufactured materials.Steel wheel rim adopts rolling technology, and spoke adopts Sheet Metal Forming Technology, form by press-fiting the final application of welding, and low price, simple, the small investment of technology, shortcoming is that product specification is low, aesthetic measure is poor.Aluminum-alloy wheel is to form by molten refining, casting, heat treatment, machinework and surface treatment, has luxurious attractive in appearance, in light weight, the product precision advantages of higher of external form, and shortcoming is that equipment has high input, reject rate height, product price height.Steel aluminium built-up wheel adopts ordinary steel ratch rim and aluminum alloy spoke assembling seam, the characteristics of aluminum alloy spoke and steel wheel rim have been taken into account, price is between two kinds of wheels, shortcoming is that rim surface need be electroplated, easily cause industrial pollution, the aluminum alloy spoke equally needs huge investment with aluminum-alloy wheel in addition.

The purpose of this invention is to provide a kind of is the vehicle wheels production technology of material with the corrosion-resistant steel, utilize this explained hereafter corrosion-resistant steel wheel, equipment investment is few, and is roughly suitable with the steel wheel investment, and making wheel body reveal the distinctive performance of corrosion-resistant steel, outward appearance is luxurious again beautiful.

The objective of the invention is to realize as follows: this production technology relates to the course of processing of wheel rim and spoke and press-fits process between the two, and the technological process of wheel rim is followed successively by: blanking → volume circle → butt welding → scrape slag → enlarging → one-time roller type → two-time roller type → expanding → valve hole → polishing → surface treatment → to pressing assembly; The technological process of spoke can be divided into Sheet Metal Forming Technology and spinning process, and the Sheet Metal Forming Technology of spoke is: blanking → one-shot forming → post forming → three time moulding → connection dashes → squeezes screw → towards breather port → squeeze breather port → machinework → surface treatment → to pressing assembly; The spinning process of spoke is: blanking → spin forming → connection dashes → squeezes screw → towards breather port → squeeze breather port → machinework → surface treatment → to pressing assembly; At pressing assembly wheel rim and spoke are welded as wheel set, the furling plate round machine roller surface sand-blast finish of wheel rim volume sired results preface, wheel rim enlarging operation adopts the enlarging of expanding formula, and the running roller of wheel rim roll shape operation need adopt the Cr12 alloy die steel, adopt laser hardening, laser transformation hardening, the surface of running roller needs ground finish; Forming force in roll-in, punching press, spin forming process needs bigger by 20% than ordinary steel, corrosion-resistant steel has bigger springback capacity man-hour adding, on mold design and technological parameter are determined, should take appropriate measures and reduce and compensate resilience, wheel rim expanding mould modulus of resilience is by 0.15%, the wheel rim technological process reduces shaping expanding amount as far as possible, the expanding amount is controlled at about 5mm, reduces the processing number of times as far as possible; In welding process, require flash of light stable violent, time is 5-6 second, welding machine need have big upset force, increase by 15% than ordinary steel upset force, when submerged-arc welding process is adopted in the assembling weldering, with miniwatt welding conditions and fast welding speed, glossing or other shotblasting and electrochemical treatment technology are adopted in surface treatment.

Adopt this production technology, can produce stainless steel wheel for motor vehicle, corrosion-resistant steel is greatly improved the strength at repeated alternation of wheel with the high and unique mechanical characteristics of its intensity, has greatly improved travel safety and the reliability of wheel under the high-speed cruising state; Unique elegance that corrosion-resistant steel has after with its good anti-oxidant, resistant to corrosion ability and polishing and electrochemical treatment is firmly got user's favor.Needn't carry out pickling to material in the corrosion-resistant steel wheel production process, reduce aerial contamination and water and polluted.

Below the present invention is further described.

Production process of stainless steel wheel for motor vehicle comprises the process that press-fits of the course of processing of wheel rim and spoke and the two.The technological process of wheel rim is: blanking → volume circle → butt welding → scrape slag → enlarging → one-time roller type → two-time roller type → expanding → valve hole → polishing → surface treatment → to pressing assembly; The technological process of spoke can divide punching press and two kinds of technologies of spinning.The Sheet Metal Forming Technology of spoke is: blanking → one-shot forming → post forming → three time moulding → connection dashes → squeezes screw → towards breather port → squeeze breather port → machinework → surface treatment → to pressing assembly; The spinning process of spoke is: blanking → spin forming → connection dashes → squeezes screw → towards breather port → squeeze breather port → machinework → surface treatment → to pressing assembly; At pressing assembly wheel rim and spoke are welded as wheel set.Because corrosion-resistant steel is lower than carbon structural steel superficial hardness, in the course of processing and transport process, cause easily and scratch and collide with, this brings difficulty can for the polishing of final workpiece, influence surface quality of products, thereby require the per pass operation all to take appropriate measures to guarantee the surface quality of workpiece, the scuffing of stopping to collide with, take following measure: the roller at wheel rim volume sired results ordered pair furling plate round machine carries out the surface sand-blasting processing for this reason, make volume circle roller surface finer and smoother, promptly guarantee the required friction force of volume circle, guaranteed the surface quality of workpiece again; Wheel rim enlarging operation is the easiest operation that causes scuffing, existing enlarging process mould adopts two cones, there are Frictional Slipping in cone and workpiece during enlarging, produce very big friction force, directly affect product design, even it is also of no avail with the change roughness to improve die surface hardness, after engineer testing adopts the enlarging of expanding formula, problem is satisfactorily resolved; Wheel rim roll shape operation also is to be easy to generate the operation that workpiece scratches, the way that solves is to adopt the Cr12 alloy die steel through laser hardening, laser transformation hardening, the pair roller wheel surface carries out ground finish in addition, improve the hardness on running roller surface and reduced roughness of surface, adopt the external hydraulic-driven roll shape machine of introducing in addition, roll shape machine two main shafts are adjusted automatically, guaranteed two running roller linear velocity unanimities, avoid the friction of roll shape process middle roll and workpiece that workpiece is formed scuffing; Other operation and spoke stamping, spinning operation to wheel rim are also taked corresponding measure, accomplish that the work piece production process does not roll off the production line, and transform the raceway and the transhipment working position apparatus of manufacturing line.Corrosion-resistant steel has higher mechanical strength than common material, and resistance of deformation is bigger by 20% than common material in the process of roll-forming, punch forming, spin forming, and corresponding forming force also strengthens 20%; Corrosion-resistant steel has bigger springback capacity man-hour adding, and takes corresponding measure reducing and compensate resilience on mold design and technological parameter are determined, modulus of resilience presses 0.15% during the design of expanding mould.Corrosion-resistant steel has higher work hardening characteristic, inter process in repeatedly moulding very easily produces work hardening, when serious even cause be full of cracks, whether rationally be key of success, should rationally arrange technology and definite technological parameter if handling in the technological design, reduce to process number of times as far as possible, control rational work hardening capacity, reduce shaping expanding amount as far as possible during design wheel rim technology and avoid the expanding cracking, generally be controlled at about 5mm, avoid roll compacting excessively in the roll shape process; Corrosion-resistant steel compares permeability of heat with carbon structural steel and electric conductivity is relatively poor, fusion temperature is low, heat is slower to the periphery diffusion in the welding process, require the secondary non-load voltage of welding machine to want high when therefore welding, require flash of light stable violent in the welding process, the time is 5～6 seconds, requires welding machine to have bigger upset force, increase by 15% than ordinary steel, to produce enough plastic deformation at weld zone.Be to reduce the oxidation of high-temperature metal in the weld bond, begin, finish the flash of light process with maximum flashing speed with the flashing speed of minimum.Because the stainless steel hot conductance is little, the line expansion factor is big, under patterned heat and cooling condition, welded joint may form bigger tensile stress in cooling process, corrosion-resistant steel easily forms the very strong column crystal seam organization of directivity simultaneously, has impelled the segregation of impurity such as S, P, form the interdendritic liquid interlayer, therefore cause thermal crack easily, select low power welding conditions and welding speed faster when adopting submerged arc-welding, on solder flux is selected, select of the generation of SJ601 sintered flux for use with the minimizing thermal crack.The corrosion-resistant steel wheel has been cancelled the pickling and the painting process of material in the steel car wheel production process, no acid solution, waste water and discharge of harmful gases.The appearance of corrosion-resistant steel wheel depends on polishing process and surface treatment, adopts glossing or other surface polishing and electrochemical treatment technology, makes wheel surface reach pure and fresh bright and clean, luxurious beautiful impression.

Claims

1, a kind of production process of stainless steel wheel for motor vehicle, relate to the process that press-fits of the course of processing of wheel rim and spoke and the two, the technological process of wheel rim is: blanking → volume circle → butt welding → scrape slag → enlarging → one-time roller type → two-time roller type → expanding → valve hole → polishing → surface treatment → to pressing assembly; The process for spoke process can be divided into Sheet Metal Forming Technology and spinning process, and the Sheet Metal Forming Technology of spoke is: blanking → one-shot forming → post forming → three time moulding → connection dashes → squeezes screw → towards breather port → squeeze breather port → machinework → surface treatment → to pressing assembly; The spinning process of spoke is: blanking → spin forming → connection dashes → squeezes screw → towards breather port → squeeze breather port → machinework → surface treatment → to pressing assembly; At pressing assembly wheel rim and spoke are welded as wheel set, the furling plate round machine roller surface sand-blast finish of wheel rim volume sired results preface, wheel rim enlarging operation adopts the enlarging of expanding formula, and the running roller of wheel rim roll shape operation need adopt Cr12 alloy die steel and laser hardening, laser transformation hardening, and the surface of running roller needs ground finish; Forming force in roll-in, punching press, spin forming process needs bigger by 20% than general steel, and modulus of resilience is by 0.15% during the expanding mold design; The expanding amount of wheel rim technological process is controlled at about 5mm; Duration of light is 5-6 second in welding process, and upset force increases by 15% than ordinary steel; Glossing or other shotblasting and electrochemical treatment technology are adopted in surface treatment.