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By 袁春凤 (Tiffany)
Rubber shock absorber for automobiles
With the development of social economy, the automobile industry at home and abroad is facing a period of rapid change, which is characterized by further improving the service life of the automobile under the premise of ensuring driving safety, riding comfort, high speed and luxury. Damping products are used to control the vibration and noise of automobiles and to improve their handling stability. They are generally placed in the engine frame, rod holder, suspension shaft lining, center bearing bracket, bump limiter and torsional vibration absorber to improve the safety and comfort of automobiles. Damping products can be divided into four categories: bracket type, shaft lining type, buffer type and damping type. The main requirements of damping, heat resistance and fatigue resistance are good. Automobile shock absorber rubber products include engine bearings, suspension components, rubber springs, rubber air springs and impact rubber protective parts. In recent years, in order to improve the safety, comfort and maneuverability of automobiles, the variety and quantity of shock absorber rubber products for automobiles are increasing as the number of shock absorber rubber products on a car has reached 50-60 pieces.
By 袁春凤 (Tiffany)
Basic knowledge of shock absorbing rubber products
1. Static stiffness: refers to the ratio of the change of pressure (or tensile force) to the change of displacement in a given displacement range. The static stiffness must be measured within a certain displacement range. The static stiffness values measured in different displacement ranges are different, but some families require the change curve measured in the whole displacement range.
2. Dynamic stiffness: It refers to the ratio of the change of pressure (or tensile force) to the change of displacement of damping rubber in a certain displacement range and a certain frequency.
3. dynamic magnification: the ratio of the dynamic stiffness to the static stiffness measured by the damping rubber in a certain range of displacement.
4. Loss coefficient: There is a phase difference between the deformation of rubber and the stress of rubber in the course of the force acting on damping rubber, and the stress of rubber is generally ahead of the phase angle of the deformation of rubber.
5. Torsional stiffness: refers to the ratio of torsional moment to torsional angle of damping rubber within a certain range of torsional angle.
6. Durability: It refers to the number of times of vibration when the rubber is in good condition after n times of reciprocating vibration under certain preloading load, amplitude and vibration frequency in a certain direction.Thanks for the help and support of Chongqing Feilong Jiangli Auto Parts technical department.
By 袁春凤 (Tiffany)
Introduction of defects in rubber products vulcanizing
1.Lack of glue: due to insufficient weight or poor fluidity, some defects should be found in rubber parts.
2.Degumming: the failure of rubber and frame inserts will result in disengagement or separation.
3.Bubbles: also known as "bulging", because the gas is coated in the rubber epidermis and the formation of local epidermis blistering phenomenon; Thanks for the help and support of Chongqing Feilong jiangli’s Technical department.
4.Rotten bubbles: also known as "pit gas", because the gas has not been discharged from the cavity, so that the die corner of the rubber cavity is less sulfur sticky, and protruding from the surrounding rubber surface phenomenon
5.Gel cracking: a phenomenon of cracking on the glue surface.
6.Under sulfur: the inner surface of the gum is microporous, and the exterior is uplifted and deformed.
7.Sticking mould: the phenomenon that the local glue of vulcanized product is adhered to the wall of the mold cavity.
8.Hot die: also known as curling edge, "bite edge" and so on, refers to the product parting line is not smooth, cracks, serrated waste edge and other phenomena.
By Mengjuan Zhu
One of the categories of automotive rubber products is belt products.
Belt products are mainly used in automobiles to transfer torque power and speed, power from the power source engine to the need for power systems and places. It is installed in cooling fan, cooling water pump, brake compressor, booster pump, air conditioning system and steering system. The car belt is mainly V belt. Usually there are three kinds, that is, wrapped V belt, cutting V and multi wedge belt to cut W belt. Cutting V-belt has no coating on both sides, good flexibility, friction coefficient, with a large force, high linear speed, heat dissipation and fatigue resistance and energy-saving characteristics, commonly used rubber MIBR and R. Synchronous toothed joint is used for valve ignition of automotive engines. Its operating conditions are high speed, high power and high temperature.
Thanks to Abby from Feilong Jiangli providing the basic data.
By Auto News
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By Auto News
By James C. Owens, Deputy Administrator, U.S. Department of Transportation, National Highway Traffic Safety Administration (NHTSA)
Only you can protect your family or yourself from defective or noncompliant vehicles or equipment that could pose a threat to your safety.
Hundreds of injuries have been reported, and 16 people have been killed in the U.S. by defective air bags that are part of the largest and most complex vehicle recalls in U.S. history—affecting tens of millions of vehicles from 19 automakers. Getting these unsafe vehicles repaired is integral to improving safety and saving lives. The U.S. Department of Transportation, National Highway Traffic Safety Administration (NHTSA) is urging vehicle owners to take a few simple steps to protect themselves and others from this urgent threat to safety. Learning how to check for recalls is the first important step, and the next is knowing how to get your recall fixed for FREE.
What is a vehicle recall?
A vehicle safety recall is just that—bringing an unsafe vehicle to a dealership to resolve a safety problem when a manufacturer or NHTSA determines that a vehicle or piece of equipment has a safety-related defect or does not comply with federal standards. Manufacturers are required to fix the problem by repairing it, replacing it, offering a refund, or in rare cases, repurchasing the vehicle. In 2019 alone, there were over 38 million vehicles recalled.
Check for recalls
If your vehicle is currently under recall, you should receive a notice in the mail from your vehicle’s manufacturer. If you’re worried about missing a notice, you can also stay up to date on recalls by signing up for notification emails.
You don’t need to wait for a notification to find out if your vehicle is under recall. Visit https://www.NHTSA.gov/recalls and enter your VIN to see if your vehicle is under recall. You can also use NHTSA’s website to check on vehicle-related products, such as car seats, tires or equipment.
Not sure where your VIN is? Look on the lower left of your vehicle’s windshield. It is 17 characters long. Your VIN is also located on your vehicle registration card, and may be shown on your insurance card too.
Get the repair (for FREE!)
If your vehicle is under recall, follow any interim safety guidance provided by the manufacturer and contact your local dealership to get the FREE recall repair.
Report problems for investigation
If you think your vehicle or equipment could have a safety defect, reporting it to NHTSA is important. If the agency receives similar reports from a number of people about the same product, this could indicate that a safety-related defect exists that would warrant an investigation. You can report any suspected safety defects to NHTSA one of two easy ways: by visiting www.NHTSA.gov/recalls, or by calling NHTSA’s vehicle safety hotline (888-327-4236 or 800-424-9393 toll-free from anywhere in the United States, Puerto Rico, and the Virgin Islands).
Vehicle owner reports fuel NHTSA’s work, and that’s why we’re committed to sharing more information with you about how to report recalls. NHTSA recommends checking your VIN twice a year to see if your vehicle is under any safety recall: when you set your clocks forward in the spring and when you set them back in the fall. Stay in touch with NHTSA and keep an eye on your mailbox for direct alerts. And if your vehicle is under recall, get it repaired for FREE immediately. With safer drivers and safer cars, we’ll have safer roads—and your efforts can help save lives.
The post Are you Driving an Unsafe Car? What You Need to Know About Recalls appeared first on Be Car Care Aware.
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