What is the intermediate frequency heating pipe bending machine and what are the characteristics of the intermediate frequency heating pipe bending machine? -Kehua
The metal pipe is straight when it is just cast. If a curved metal pipe is required, a pipe bender will be used to bend the metal pipe, and the intermediate frequency heating pipe bender is the most commonly used equipment. Next, Kehua will tell you what is an intermediate frequency heating pipe bending machine, and what are the characteristics of the intermediate frequency heating pipe bending machine? What is the intermediate frequency heating pipe bending machine? The bending is carried out under the condition of local heating. At present, it is widely used in pipeline prefabrication in electric power, petroleum, chemical, marine, nuclear industry and other engineering fields. According to Kehua's understanding, the process of intermediate frequency pipe bending is to put an induction coil on the part to be bent of the steel pipe, clamp the pipe head with a mechanical arm, and pass an intermediate frequency current into the induction coil to heat the steel pipe. When the temperature of the steel pipe rises to a plastic state, At the back end of the steel pipe, the mechanical thrust is used to push and bend it, and the bent steel pipe part is rapidly cooled with a coolant, so that while heating, pushing, bending, and cooling, the bend is continuously bent. What are the characteristics of the intermediate frequency heating pipe bending machine 1. The intermediate frequency pipe bending adopts a power supply with vertical external characteristics, and the positive polarity is used for DC (welding wire is connected to the negative electrode) 2. The intermediate frequency pipe bending machine is generally suitable for the welding of thin plates below 6mm, and the welding seam is beautiful. 3. The shielding gas is argon with a purity of 99.99%. When the welding current is 50~50A, the argon flow rate is 8~0L/min, and when the current is 50~250A, the argon gas flow rate is 2~5L/min. 4. The welding arc length is preferably 2~4mm when welding ordinary steel, and 1~3mm when welding stainless steel. If it is too long, the protection effect will not be good. 5. In order to prevent the occurrence of welding pores, the intermediate frequency elbow must be cleaned if there is rust or oil stains in the welding part. 6. The length of the tungsten electrode protruding from the gas nozzle is preferably 4~5mm. It is 2~3mm in places with poor shielding such as fillet welding, and 5~6mm in places with deep grooves. The distance from the nozzle to the working is generally not enough. more than 5mm. The volume of the intermediate frequency heating pipe bending machine is very small, and it takes time to bend the metal pipe after local heating, which saves the bending time and greatly improves the work efficiency.