This international standard specifies test methods carried out under controlled conditions for verifying the uniformity of tyres for passenger cars, commercial vehicles and motorcycles. These standards include the parameters of radial force variation, lateral force variation, conicity, plysteer, radial runout, lateral runout, and sidewall bulge. Road wheelldrive system the road wheel is a drum that is 62. This document comes with our free notification service, good for the life of the document. Chapter tyre testing in real conditions deals with a classification of tests in terms of vehicles behaviour on the road, in terms of the tested roadway surface, specialties and the character of the assessment process and with measurement of properties.
Highresolution, contact free laser triangulator for measuring the geometric deformation of the rim and tyre. Tire uniformity, highspeed uniformity testing, statics analysis, vibration analysis. Balancing and safety of the vehicle are the primary issues for automobile industry. Tyre uniformity measuring machines hofmann maschinen. For tires, the various measures of nonuniformities are related to force. Uniformity measurement to measure uniformity, tire is mounted on a steel rim, inflatedand loaded against a load wheel. As compliance experts, apv offers low voc, voc free, haps free, and waterbased formulations to meet global environmental and epa requirements. Tire uniformity testing machines are extremely important since they help provide a smooth ride.
A study of tyre cavity resonance and its mitigation using modal analysis method napasin chanpong 1. The wheel balancer further includes an encoder configured to determine the angular positions of the measuring shaft or of the rimtyre assembly, a load device configured to. The top countries of supplier is china, from which the percentage of tire uniformity supply is 100% respectively. The invention relates to a device for measuring the uniformity of a vehicle tire, of the type defined more closely in the precharacterising portion of claim 1. Because life is not about the destination, its about the journey. The lighting handbook human centric lighting human centric lighting hcl expresses the positive effect of light and lighting on the health, wellbeing and performance of humans and thus has both short and longterm benefits. Tyre uniformity machine buy tyre testing machine product. Tyretotravel is the platform for searching, making and sharing routes. Inspection systems for the tire industry microepsilon. If you need to download a copy of adobes acrobat reader its available free from adobe for a variety of computer platforms.
Tire nonuniformity, vibration of tires, force transmissibility. Passenger and light truc limited warranty uniformity issues, toyo tires will replace, free of charge, any eligible tire when the original usable tread is worn by 25% or less, and within 60 months from the date of purchase. The times newspaper in britain was still using tire as late as 1905. Low speed uniformity testers are only capable of measuring rfv and lfv at rotational speeds around 60rpm 60 rpm on a 29 outside tire diameter 5 mph. Tyre uniformity machine, find complete details about tyre uniformity machine,tyre testing machine from auto production line equipment supplier or manufacturerhindalps. Tire testing machines uniformity tbr ltr pcr page 6 functional principle. Capacities starting from 15 tyres per hour capable of retreading a wide range of light truck and truck casings in a. Home complianceonline standards iso ics 83 rubber and plastics industries test methods for measuring tyre uniformity test methods for measuring tyre uniformity. For passenger tyre uniformity test is an important criteria. Standard tyre uniformity is very different from highspeed uniformity, so different machines are needed to do the testing. The tirewheel uniformity test machine see figure 1 consists of a road wheel, a tire carriageltransducer system, a linear variable displacement transformer lvdt, and computerbased instrumentation. The unique strength and heatresistant properties of our highperformance aramid enable a lighter, stronger, more sustainable end product. It also includes some tips and repair techniques to prevent vehicle shakes, shimmies or vibration conditions to help you improve your customers ride and comfort. Note lack of uniformity around a tyre produces variations in forces.
To meet the auto industrys demands for tire uniformity and quality, kokusai offers tire and wheel laboratory testing, with tire durability and road simulator equipment to test tires and wheel assemblies. Approach check carcass and belt drums for poor segment alignment. The tire highspeed uniformity testing machine thutm is a testing equipment to measure the mechanical characteristic parameters under the condition of high speed and load, which is a precise detection system with a high added value. The pelmar group offers for sale 2nd hand akron standard tire uniformity machine. Finite element analysis of tire highspeed uniformity. The tire designers goal is a finished tire that is free of nonuniformity in either the. Quality control and inspection of tyres slideshare.
The non uniformities of the tire create a wave form of force variations as the tire rotates. System to help detect potential tire uniformity causes of vibration that are not balancerelated. Kokusai is pleased to offer one of our latest releases to the industry, our newly redesigned combination wheel gauging and balancing machine. Any reference to truck tires in this manual includes tires load range f and higher for medium trucks and buses. Tyre uniformity measuring machine type rgme purpose and application the tyre uniformity measuring machines from hofmann are designed for the inproduction quality control of finished tyres. A boxlike subframe is mounted on the base and supports a mounting plate for the tirewheel assembly. The purpose of this manual is to provide both the tire service professional and end user driver with an understanding of the many factors that are essential to the proper care and service of truck and bus tires.
Pdf tyres play a commanding role in an automobile industry. The hsu500 utilizes tmsis patented dynamic force measurement system us patent no. Tyres enable vehicle performance by providing for traction, braking, steering, and load support. This standard replaces gb t185062001 automobile tire uniformity test method. Tire uniformity table of contents january 2001 model b, rev 1 310 introduction geometry variations free radius radius between the tire center and outside diameter when unloaded. This system utilizes a road roller which applies up to 1,400 pounds 635 kg of force against the wheel and tire assembly to measure their combined uniformity. Standard testing and oem testing according to the test procedures of the automotive companies. A comprehensive and fast quality statement is enabled by measuring the force fluctuations and static force reactions in radial and lateral direction on the rolling tyre under load. The hofmann tyre uniformity measuring machines are used for qualitative final inspections of. Haiqiao wei 2, simon watkins, xu wang 1 rmit university, australia 2 tianjin university, p. Us8739624b2 wheel balancer with means for determining. Tire uniformity refers to the dynamic mechanical properties of pneumatic tires as strictly defined. This process provides longterm reliable measurement results while avoiding consequential costs.
Device for measuring the uniformity of a vehicle tire zf. A compact rigid frame has a base formed by a plurality of longitudinal and transverse frame members for supporting the machine on a planar surface. China abstract this paper will focus on determining characteristics of tyre cavity resonance noise and its mitigation method. The testing covered radial and biasply truck tires of the tubeless and tubetype, disc and castspoke wheels, single and dual configurations, and variations in load, pressure, and speed. Toyo commercial tires combine toptier product performance, application. Tire nonuniformities give rise to rolling force variation at the spindle during steady state rolling. In order to evaluate tire uniformity, a threedimensional finite element model of the tire with imperfections is developed.
The machine can also be used to measure free radial runout at various locations across the tire, for example, left shoulder, centerline, and right shoulder. Tire uniformity machines are used to inspect the quality of automotive tires. Some other conditions, such as plysteer and conicity are derived from these measurements. The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis.
Nevertheless, traditional publishers continued using tire. The word tire is a short form of attire, from the idea that a wheel with a tire is a dressed wheel the spelling tyre does not appear until the 1840s when the english began shrink fitting railway car wheels with malleable iron. The present application relates to a wheel balancer which includes a stationary frame, a measuring shaft mounted rotatably about a shaft axis on the stationary frame and adapted to receive coaxially a rimtyre assembly. Pdf selection of r14tyres using analytic hierarchical. Pdf finite element analysis of nonuniformity of tires with. The automotive industry conducts quality or incoming goods inspection with the tyre uniformity measuring machines. Tire uniformity test system tmsis tire uniformity test system hsu500 provides the highest quality measurements available in tire uniformity testing for speeds up to 250kmh. This paper describes an experiment where a series of experimental truck tyres. The green tire uniformity system gtu is a sensor and software package used to scan green tires at any stage of production to measure the key geometry features that affect cured tire uniformity and imbalance performance. Pdf finite element analysis of nonuniformity of tires. The uniform tire quality grading standards utqgs 575. The machine is in good condition and could be delivered fully reconditioned. Tire uniformity refers to the dynamic mechanical properties of pneumatic tires as strictly defined by a set of measurement standards and test conditions accepted by global tire and car makers. The world s first diagnostic tyre changer uniformity is the first technology that allows matchmounting to be carried out directly on the tyre changer.
The mode of transportation of the tire 40 may be manual or automated on a conveyor system 8. Inplane vibration and tire force transmissibility owing to tire non. This new system is equipped with sensors that detect the wheel and locate the angle of the valve hole. Loaded radius radius between tire center and road or loadwheel when loaded. Light has a triple effect light for visual functions illumination of task area in conformity with relevant standards. Five ways to improve tire uniformity at the tire building. Honeywell warrants goods of its manufacture as being free of. With exhibits from many of the worlds most important suppliers to the tire manufacturing industry plus a major conference, workshop program and industryleading awards dinner, tire technology expo is a mustattend industry event. Uniformity pc, light truck and truck and bus tires application. The product is applied by conventional spray or with a 8 oz plastic bottle and applicator nozzle for an easy and. Testing force variation at low speeds is similar to the testing of static. And if you would like to be informed of our articles regularly, please register with us for free updates today.
This document is available in either paper or pdf format. In order to evaluate tire uniformity, a threedimensional. A drive motor is connected to the axle of the load wheel and drives the tire and drum at 60 rpm. Lack of uniformity around a tyre produces variations in forces applied by the tyre to the vehicle and this influence is repeated with each revolution of the tyre. Tire uniformity correction without grinding michelin recherche et. This provides a way to thoroughly study the carcass, belt tread package, and final shaped green tire.
A portable machine for testing on site the uniformity of a tire or other components of a tirewheel assembly. If you continue browsing the site, you agree to the use of cookies on this website. The running smoothness of a vehicle and the wear of various vehicle components depend on the uniformity on otherwise of the vehicles tires. Important forces, moments, and other aspects of tire performance can be inspected with tests such as. Experience has shown that the problem of bus and truck tyre uniformity is equally important, especially in connection with increased safety and comfort requirements from bus and truck tyres. These standards include the parameters of radial force variation, lateral force variation, conicity, plyste. Iso326 test methods for measuring tyre uniformity document center. A typical loaded radius is an inch and a quarter less than an unloaded radius.
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