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The difference between hot-formed elbows and stamped elbows
Release time:
Mar 12,2021
Elbows are pipe fittings used at pipe bends. Common elbow-forming processes include hot pressing, stamping, and extrusion. But do you know the difference between hot-pressed elbows and stamped elbows? Today, our editor will introduce you to the distinctions between these two types of elbows. 1. Different manufacturing processes A hot-pressed elbow is made by heating a pipe and using specialized equipment to shape it. The pipe is heated above its critical temperature, held at that temperature for a certain period, and then rapidly immersed in a quenching medium, causing an abrupt drop in temperature. This process results in a cooling rate faster than the critical cooling rate. A stamped elbow, also known as a stamped-welded elbow, is formed by stamping a semi-circular shape from the same material as the pipe using a die.
Elbows are pipe fittings used at pipe bends. Common elbow-forming processes include hot pressing, stamping, and extrusion. So, do you know the difference between hot-pressed elbows and stamped elbows? Today, I’ll introduce you to the differences between the two.
1. Different processes
A hot-bent elbow is manufactured by heating a pipe, using specialized equipment to shape and cut it, raising its temperature above the critical point, holding it at that temperature for a certain period, and then rapidly plunging it into a quenching medium, thereby causing an abrupt drop in temperature. Its cooling rate is faster than the critical cooling rate.
A stamped elbow, also known as a stamped-welded elbow, is manufactured by using the same material as the pipe to stamp a semi-circular elbow with a die, and then welding two such semi-circular elbows together.
2. Different production times
Hot-pressed elbows require a certain temperature to reach a specific zero point, and their production speed is relatively slow.
The stamped elbow is manufactured through stamping, a process carried out using stamping dies and stamping equipment. High-speed pressure can reach hundreds of times per minute, or even exceed that. 1,000 times, and each stamping stroke produces one stamped part. Therefore, compared to hot-bent elbows, stamped elbows offer higher production efficiency and less time consumption.
3. Different hazard coefficients in production
Hot-pressed elbows are formed at high temperatures, requiring high heat and easily causing injuries. Stamped elbows are manufactured using fully automated mechanical stamping, requiring minimal manual operation and thus offering relatively high safety.
What are the characteristics of stamped elbows?
1. Stamping is a process carried out using stamping dies and stamping equipment, which can operate at high speeds—reaching hundreds or even over a thousand strokes per minute. Each stamping stroke produces a stamped part, making stamping a highly automated and efficient manufacturing process.
2. Generally speaking, stamped parts do not produce chips or scrap material, resulting in low material consumption and eliminating the need for additional heating equipment. Consequently, stamping is a processing method that saves both materials and energy.
3. Stamping can produce parts with a wide range of sizes and complex shapes, such as watches and stopwatches, automobile beams, and body panels. Moreover, during the stamping process, the cold work hardening effect on the material enhances the strength and stiffness of stamped parts. Stamping dies ensure high dimensional and shape accuracy of stamped parts, typically without compromising their surface quality, and they also boast longer tool life.
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