Application of Boring in Automobile Manufacturing

Boring is a very important process in automobile manufacturing. It is mainly used to process the holes of key components such as engine block, cylinder head, crankshaft and connecting rod to ensure their dimensional accuracy, shape accuracy and position accuracy, so as to ensure the performance and reliability of the car. This paper will introduce the application of boring in automobile manufacturing in detail.

Boring of engine cylinder block and cylinder head

Engine block and head are the key components of automobile engine, their accuracy and quality directly affect the performance and reliability of the engine. In the process of engine manufacturing, the cylinder block and cylinder head need to be boring to process piston holes, valve holes, water holes, etc. The dimensional accuracy and shape accuracy of these holes are very high, generally need to achieve IT7-IT8 level accuracy, surface roughness requirements are also very high, generally need to reach Ra0.8-Ra1.6μm.

In order to ensure the accuracy and quality of boring, it is necessary to use a high-precision boring machine and boring tool, and strictly control the processing parameters, such as cutting speed, feed, cutting depth and so on. At the same time, it is also necessary to detect and measure the hole after processing to ensure that it meets the design requirements.

2. Boring of crankshaft

Crankshaft is one of the important parts of the automobile engine, its role is to convert the reciprocating motion of the piston into a rotating motion, so as to drive the car. In the process of crankshaft manufacturing, it is necessary to bore the main shaft journal and connecting rod journal of the crankshaft in order to process the hole matching with the bearing. The dimensional accuracy and shape accuracy requirements of these holes are also very high, generally need to achieve IT6-IT7 level accuracy, surface roughness requirements are also very high, generally need to reach Ra0.4-Ra0.8μm.

In order to ensure the accuracy and quality of boring, it is necessary to use a high-precision boring machine and boring tool, and strictly control the processing parameters, such as cutting speed, feed, cutting depth and so on. At the same time, it is also necessary to detect and measure the hole after processing to ensure that it meets the design requirements.

Three, connecting rod boring

The connecting rod is one of the important parts of the automobile engine, its function is to convert the reciprocating motion of the piston into the rotating motion of the crankshaft. In the process of connecting rod manufacturing, it is necessary to boring the big head holes and small head holes of connecting rod to process the holes matching with the crankshaft and piston pin. The dimensional accuracy and shape accuracy requirements of these holes are also very high, generally need to achieve IT6-IT7 level accuracy, surface roughness requirements are also very high, generally need to reach Ra0.4-Ra0.8μm.

In order to ensure the accuracy and quality of boring, it is necessary to use a high-precision boring machine and boring tool, and strictly control the processing parameters, such as cutting speed, feed, cutting depth and so on. At the same time, it is also necessary to detect and measure the hole after processing to ensure that it meets the design requirements.

4. Boring of other parts

In addition to the above parts, automotive manufacturing also needs to boring some other parts, such as transmission shell, steering knuckle, wheel hub and so on. The boring accuracy and quality requirements of these parts are also very high, generally need to achieve IT6-IT7 precision, surface roughness requirements are also very high, generally need to reach Ra0.4-Ra0.8μm.

In order to ensure the accuracy and quality of boring, it is necessary to use a high-precision boring machine and boring tool, and strictly control the processing parameters, such as cutting speed, feed, cutting depth and so on. At the same time, it is also necessary to detect and measure the hole after processing to ensure that it meets the design requirements.

In short, boring is a very important processing technology in automobile manufacturing, which directly affects the performance and reliability of automobiles. In the process of automobile manufacturing, the precision and quality of boring need to be strictly controlled to ensure the quality and safety of the automobile.