Rolling method of right cone frustum shell bodies

Abstract

The invention relates to a rolling method of right cone frustum shell bodies. The rolling method comprises the following steps of: 1) before rolling, cutting a shell body into an unfolded-fan-shaped workpiece according to a design drawing, dividing the workpiece into 4-12 equal parts according to the length of each fan-shaped steel plate, and causing the length of each equal part to be subject tothe standard that the workpiece rolls in parallel and does not to warp; 2) making roll arc sample plates R1 and R2, the radian of R1 is equal to the diameter of an upper opening of the fan-shaped workpiece, and the radian of R2 is equal to the diameter of a lower opening of the fan-shaped workpiece; during rolling the shell body, using the sample plates to check up the degree of circular curve ofthe upper opening and the lower opening; 3) during rolling the shell body, the lift angle Beta of one end of a three-roll plate bending machine is equal to 90 degrees minus Alpha, and Alpha is the degree of an angle of inclination of the shell body of a cone furnace; and 4) sequentially processing all shell bodies piecewise, keeping the rolling of each equal part and the upper roll shaft of the three-roll plate bending machine be a ray state, and rolling processing in parallel. The rolling method has strong operability, simple steps, convenience for checking up and high degree of accuracy, the damage of a crank shaft and the shell bodies is decreased, and the quality and efficiency are increased.

Description

technical field [0001] The invention relates to the manufacturing field of steel structural parts, and in particular relates to a rolling method for a right truncated conical shell. Background technique [0002] The blast furnace shell is divided into a straight belt and a conical belt part. The straight belt part is in the form of a cylinder, and the tapered belt part is generally in the form of a positive or inverted positive conical truncated cone. The rolling of the conical belt part of the furnace body is an important process in the manufacture of the blast furnace shell. The quality of the rolling will directly affect its connection with the upper and lower belts, and further affect the quality of the furnace shell. The traditional production method is to put the small opening of the shell plate close to the lifting shaft on one side of the plate rolling machine, and the shell plate is rolled back and forth from left to right, and the resistance is generated by the fri...

AI Technical Summary

Problems solved by technology

This method will generate huge friction during the rolling process, which will cause damage to the lifting shaft of the plate rolling machine, and will also cause serious cracks and gaps on the small opening of the shell, and it is easy to cause distortion. After the rolling is completed, the correction work The amount is so large that it affects the final molding quality of the shell, and finally affects the quality of the entire furnace shell

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