China abstract this paper will focus on determining characteristics of tyre cavity resonance noise and its mitigation method. 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. A study of tyre cavity resonance and its mitigation using modal analysis method napasin chanpong 1. 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. Home complianceonline standards iso ics 83 rubber and plastics industries test methods for measuring tyre uniformity test methods for measuring tyre uniformity. 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 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. Tire uniformity machines for tire manufacturing honeywell sensing. Nevertheless, traditional publishers continued using tire. Pdf finite element analysis of nonuniformity of tires. As compliance experts, apv offers low voc, voc free, haps free, and waterbased formulations to meet global environmental and epa requirements. Tyre uniformity machine, find complete details about tyre uniformity machine,tyre testing machine from auto production line equipment supplier or manufacturerhindalps. This standard replaces gb t185062001 automobile tire uniformity test method. 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.
These standards include the parameters of radial force variation, lateral force variation, conicity, plysteer, radial runout, lateral runout, and sidewall bulge. 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. This international standard specifies test methods carried out under controlled conditions for verifying the uniformity of tyres for passenger cars, commercial vehicles and motorcycles. Tire uniformity, highspeed uniformity testing, statics analysis, vibration analysis.
Pdf the effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by. In order to evaluate tire uniformity, a threedimensional finite element model of the tire with imperfections is developed. Highresolution, contact free laser triangulator for measuring the geometric deformation of the rim and tyre. Some other conditions, such as plysteer and conicity are derived from these measurements. Tyretotravel is the platform for searching, making and sharing routes.
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. This process provides longterm reliable measurement results while avoiding consequential costs. 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. 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. 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. System to help detect potential tire uniformity causes of vibration that are not balancerelated. 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. Note lack of uniformity around a tyre produces variations in forces. The mode of transportation of the tire 40 may be manual or automated on a conveyor system 8. 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. 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.
Approach check carcass and belt drums for poor segment alignment. Uniformity pc, light truck and truck and bus tires application. Pdf tyres play a commanding role in an automobile industry. The hsu500 utilizes tmsis patented dynamic force measurement system us patent no. Inplane vibration and tire force transmissibility owing to tire non. 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. Any reference to truck tires in this manual includes tires load range f and higher for medium trucks and buses. Standard tyre uniformity is very different from highspeed uniformity, so different machines are needed to do the testing. The hofmann tyre uniformity measuring machines are used for qualitative final inspections of. The product is applied by conventional spray or with a 8 oz plastic bottle and applicator nozzle for an easy and. Tyre uniformity machine buy tyre testing machine product. 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.
Honeywell warrants goods of its manufacture as being free of. 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 tyre and automobile industries have been successfully using test machines for measuring tyre uniformity for many years. Tire uniformity machines are used to inspect the quality of automotive tires. In order to evaluate tire uniformity, a threedimensional. The machine is in good condition and could be delivered fully reconditioned. If you continue browsing the site, you agree to the use of cookies on this website. If you need to download a copy of adobes acrobat reader its available free from adobe for a variety of computer platforms. For passenger tyre uniformity test is an important criteria. Device for measuring the uniformity of a vehicle tire zf.
Pdf selection of r14tyres using analytic hierarchical. This document is available in either paper or pdf format. These standards include the parameters of radial force variation, lateral force variation, conicity, plyste. Kokusai is pleased to offer one of our latest releases to the industry, our newly redesigned combination wheel gauging and balancing machine. Tire uniformity testing machines are extremely important since they help provide a smooth ride. Loaded radius radius between tire center and road or loadwheel when loaded. The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. Haiqiao wei 2, simon watkins, xu wang 1 rmit university, australia 2 tianjin university, p. Inspection systems for the tire industry microepsilon. The non uniformities of the tire create a wave form of force variations as the tire rotates. Quality control and inspection of tyres slideshare.
Uniformity measurement to measure uniformity, tire is mounted on a steel rim, inflatedand loaded against a load wheel. A portable machine for testing on site the uniformity of a tire or other components of a tirewheel assembly. The running smoothness of a vehicle and the wear of various vehicle components depend on the uniformity on otherwise of the vehicles tires. Iso326 test methods for measuring tyre uniformity document center. 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.
Tire testing machines uniformity tbr ltr pcr page 6 functional principle. The world s first diagnostic tyre changer uniformity is the first technology that allows matchmounting to be carried out directly on the tyre changer. A drive motor is connected to the axle of the load wheel and drives the tire and drum at 60 rpm. 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. The pelmar group offers for sale 2nd hand akron standard tire uniformity machine. A boxlike subframe is mounted on the base and supports a mounting plate for the tirewheel assembly. Testing force variation at low speeds is similar to the testing of static.
The tire designers goal is a finished tire that is free of nonuniformity in either the. Us8739624b2 wheel balancer with means for determining. Toyo commercial tires combine toptier product performance, application. 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. 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. 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. Tire uniformity refers to the dynamic mechanical properties of pneumatic tires as strictly defined. 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. Tire nonuniformity, vibration of tires, force transmissibility. Capacities starting from 15 tyres per hour capable of retreading a wide range of light truck and truck casings in a. For tires, the various measures of nonuniformities are related to force.
Tire nonuniformities give rise to rolling force variation at the spindle during steady state rolling. Tyres enable vehicle performance by providing for traction, braking, steering, and load support. Finite element analysis of tire highspeed uniformity. And if you would like to be informed of our articles regularly, please register with us for free updates today. Tyre uniformity measuring machines hofmann maschinen. 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. The unique strength and heatresistant properties of our highperformance aramid enable a lighter, stronger, more sustainable end product. Light has a triple effect light for visual functions illumination of task area in conformity with relevant standards.
The automotive industry conducts quality or incoming goods inspection with the tyre uniformity measuring machines. The top countries of supplier is china, from which the percentage of tire uniformity supply is 100% respectively. 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. 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. This paper describes an experiment where a series of experimental truck tyres.
Five ways to improve tire uniformity at the tire building. A typical loaded radius is an inch and a quarter less than an unloaded radius. Tire manufacturing method for improving the uniformity of a tire. The times newspaper in britain was still using tire as late as 1905.