Antirust process for connecting rod of automotive engine

Abstract

The invention relates to an antirust process for a connecting rod of an automotive engine. The antirust process comprises the following steps of: cleaning the connecting rod in a cleaning room to remove oil dirt and scrap iron on the surface of the connecting rod; rinsing the connecting rod in a rinsing room and primarily oiling the connecting rod by using an antirust oil-doped cleaning solution; baking the connecting rod in a baking room, and evaporating excessive water content on the surface of the connecting rod, and coating atomized antirust oil on the connecting rod in a spraying and coating room. In the invention, the connecting rod is put in a material channel in a vertical manner, and is cleaned and oiled in a passageway in a spraying manner so as to keep a certain cleanness and a good antirust effect through the process of the four steps. The antirust process is simple and convenient to operate, and has an obvious effect; and when the antirust process is adopted, the requirement for the automated process is met, labor cost is reduced, and many costs for materials are also saved.

Description

technical field [0001] The invention relates to a manufacturing process of automobile parts, in particular to a rust-proofing process for connecting rods of automobile engines. Background technique [0002] The connecting rod is an important part in the automobile engine. It connects the piston and the crankshaft. Its function is to convert the reciprocating motion of the piston into the rotational motion of the crankshaft, and transmit the force acting on the piston to the crankshaft to output power. Since the connecting rod plays a very critical role in the engine, the requirements for its dimensional accuracy and the surface of the parts are very high. Not only do the parts need to be very clean and free from rust, but also four pieces of connecting rods in each engine are required to be assembled together. weight. [0003] In actual production, connecting rods are processed in large batches, and automatic production lines have already begun. At the same time, because th...

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Problems solved by technology

[0003] In actual production, connecting rods are processed in large batches, and automatic production lines have already begun. At the same time, because they are directly sent to powertrain assembly after machining, the traditional process often does not oil the connecting rods that have just been machined. The factory directly produces the connecting rods, and then immediately transports them to the engine assembly line for assembly. Because of the good storage conditions and short inventory cycle, the parts are not easy to rust; but once the connecting rods are delivered by the parts factory to the main engine factory, various types of inventory will be involved. Environment, and different transportation conditions, and generally the storage period of the connecting rod is long (generally more than 45 days), the connecting rod is easy to rust, so oiling is required to avoid the rust problem, and at the same time, more requirements are put forward for the rust prevention process of the parts. High requirements, such as cleanliness is good, sediment cannot exceed the standard, the weight of the connecting rod should be consistent after oiling, so that the final connecting rod weight grouping is correct, and other foreign objects cannot be adhered to, etc.

[0004] The existing general anti-rust technology can be completed by using heavy oil immersion equipment for oiling, or manual brushing, spraying, etc.; the former allows all parts to be immersed in anti-rust oil to achieve all-round oiling of the connecting rod, but it is easy to Excessive oiling causes the cleanliness of the connecting rod to exceed the standard, foreign matter adheres to the surface, oil accumulation in the bolt hole causes the torque to decrease, and the weight difference of the connecting rod is too large to be matched; the latter will cause insufficient oiling during oiling. Uniform, so that some parts of the parts can not be oiled, affecting the anti-rust effect

[0005] To sum up, the traditional antirust method for connecting rods not only wastes a lot of cleaning fluid and antirust fluid, but also is not easy to realize automatic production and processing, which seriously affects the beat, and increases the cost of manpower and materials; at the same time, it may also lead to Excessive cleanliness caused by too much oil, or uneven oiling will reduce the anti-rust effect; and the surface of the parts is easy to adhere to dirt and cause secondary pollution, and oil accumulation in bolt holes causes problems such as torque reduction.

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