Revealing Thread Manufacturing: Cold Work to Rolling

In modern manufacturing, thread processing is an indispensable link. This article will take you deep into the various stages of thread processing and explore how to create high-quality thread products through refined production processes.

I. Cold Working Technology for Bolt Threads

The processing of bolt threads commonly employs cold working technology. This technique involves applying pressure through a die plate (rolling die) to deform the thread blank within a certain diameter range, thereby forming the thread. The advantage of this processing method is that the plastic flow lines of the thread section remain unbroken, which not only strengthens the thread's strength but also improves the precision and quality of the product. Therefore, cold working technology is widely used in thread production.

II. Precision Control of Thread Blank Diameter

In the thread processing, to obtain the final product's thread outer diameter, it is necessary to precisely control the thread blank diameter based on factors such as thread accuracy and whether the material has a coating. This step is crucial and directly affects the final quality of the thread.

III. Plastic Deformation Process for Roll Forming Threads

Roll forming thread processing is an advanced method that uses plastic deformation to shape the thread teeth. By using a rolling die with the same pitch and thread shape as the thread being processed, the cylindrical blank is simultaneously squeezed and rotated, ultimately transferring the die's thread shape to the blank and achieving precise thread formation.

IV. Considerations for Roll Forming Thread Processing

The number of rolling revolutions is a key factor in roll forming thread processing. Too many or too few revolutions can affect the quality of the thread. Excessive revolutions can lead to low efficiency and the easy occurrence of separation or cross-threading on the thread tooth surface; too few can result in the thread diameter becoming out of round, abnormal increases in initial pressure, and shortened die life.

V. Common Defects and Quality Control

Common defects in roll forming thread processing include surface cracks, scratches, cross-threading, and out-of-roundness in the thread section. These defects are easily detected and addressed when they occur in large numbers. However, if the number of defects is small, they may go unnoticed in the production process and eventually reach the market, causing inconvenience to users. Therefore, summarizing the key issues of processing conditions and strictly controlling these factors during production is crucial for ensuring thread quality.

In conclusion, thread processing may seem simple, but it actually encompasses rich technical content. Only by paying attention to every detail can we produce high-quality thread products that meet market demands. As a company specializing in thread processing, we are committed to technological innovation and providing users with high-quality and reliable products.