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By 袁春凤 (Tiffany)
Definition of free forging Free forging is the use of impact force or pressure on the metal between the top and bottom of the anvil free form in all directions, without any restrictions to obtain the desired shape, size and certain mechanical properties of the forging method.
Free forging equipment
The equipment of free forging can be divided into two categories: forging hammer and hydraulic press. The hammer used in production is air hammer and steam air hammer. Hydraulic press is the only way to produce large forgings by using static pressure generated by liquid to deform the blank.
Basic process of free forging
Rough upsetting is a forging process which makes the cross section of billet larger and the height smaller. There are two kinds of upsetting: integral upsetting and partial upsetting. Drawing and drawing is the opposite of upsetting. It is a forging process to increase the length of the billet and reduce the cross section. The punching process of punching holes or blind holes on billets is called punching. The characteristics of free forging and the application of free forging depend on manual operation to control the shape and size of forgings. Therefore, the forgings have low precision, large machining allowance, high labor intensity and low productivity. Therefore, it is mainly used in single-piece and small-batch production with simple structure and shape of forgings.
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 Charlie Duan
Natural rubber (NR) mainly consists of rubber hydrocarbon (polyisoprene), containing a small amount of protein, water, resinic acid, sugar and inorganic salt.
High flexibility, high tensile strength, good tear resistance and electrical insulation, good abrasion resistance and drought resistance, good processing, easy to bond other materials, better than most synthetic rubber in comprehensive performance.
The disadvantages are poor oxygen resistance and ozone resistance, easy to aging and deterioration;
Poor oil and solvent resistance, low corrosion resistance to acid and alkali;
Low heat resistance.
Temperature range of use: about 60 ℃ ~ + 80 ℃.
Making tires, rubber shoes, rubber pipes, tape, insulation and sheaths for wire and cable, and other common products.
It is especially suitable for manufacturing torsional vibration eliminator, engine shock absorber, machine support, rubber - metal suspension element, diaphragm and moulded products.
Chongqing feilong jiangli has many years' experience in manufacturing rubber parts. Pls feel free to contact me if you have any queastion! [email protected]
By Charlie Duan
The rubber material determines the service range and service life of the rubber soft connection. Different rubber materials correspond to different medium environments, and the use of rubber materials not suitable for pipeline circulation media greatly shortens the use effect of the rubber soft connection, which may also have a great impact on the service life of the whole pipeline. Chongqing Feilong Jiangli has many years' experience in manufacturing rubber auto parts. Pls feel free to contact me if you have any interest in us. [email protected]
By 袁春凤 (Tiffany)
(1) When the water pump is installed, the water seal seating assembly is not installed in place, causing the pump to continue to leak. There will also be a variety of reasons leading to the decrease of the front headlight illumination or the effect of the radiator. When the water seal is leaking, the cooling water is thrown out and dripping from the inspection hole of the pump when the pump shaft meets the retaining ring. In addition to the maintenance supplies, such as the spare tire, Jack, the tyre wrench and so on before the road, the pump does not pay attention to the pump when the retaining ring is changed. The body and the pump cover can not be well connected and sealed.
(2) the machinery is old and old, the wear, corrosion and aging of the machine parts in the water seal, so when the engineering machinery has long been suspended, there is no cooling water in the engine, it can deal with the metabolites accumulated in the human body as soon as possible, which will cause a small amount of leakage. In addition, there are some "penetrating night" night vision instruments in the market, and the bakelite seal mat and cast iron bushing have not been fully ground. It will also lead to a small amount of water leaking in the water pump, which can easily cause the uneven wear of the bakelite gasket and the lining face: the spring is soaked in the water for a long time. The road conditions of 5-200 meters or even 500 meters were clearly observed.
(3) forget to let water or release water in winter, and the temperature is too high when the water is released. Before leaving the car, we must carefully check the headlights, taillights, steering lights and brake lights, all of which may cause the water pump body to be frozen to cause leakage.
Thanks for the help of the Chongqing Feilong Jiangli Auto Parts’ Technical dept And welcome to share the idea with us. Thanks