Factors Affecting the Outer Diameter Accuracy of Square Tubes
Date:2022-03-21View:578Tags:Square Tube
The outer diameter accuracy of the square tube is artificially determined, and the result depends on the customer. It depends on the customer's requirements for the outer diameter of the tube, the operation and accuracy of the steel tube sizing equipment, and the steel tube sizing process system.
The square tube sizing method is an important factor in determining the outer diameter tolerance of the steel tube. Longitudinal rolling and sizing square pipe, the outer diameter accuracy of steel pipe can reach about 1%, while skew rolling sizing square tube has a high outer diameter accuracy of 0.5%.
The influence of the process system on the accuracy of the outer diameter of the steel pipe is mainly determined by the rolling temperature of the steel pipe sizing machine and the stability of the temperature. When the rolling temperature of the steel pipe is high, the shrinkage of the square tube after rolling is large, and it is often easy to exceed the outer diameter to produce a negative deviation of the steel pipe; on the contrary, a low rolling temperature may exceed the positive deviation and become a defective product. Therefore, the steel pipe rolling mill should be continuously adjusted according to the size and specification of the sizing square tube, the steel pipe grade, as well as the temperature and tool wear.
In the process of rapid industrial development, the proportion of square tubes in my country's steel production is increasing. Due to the extensive use of square tubes, higher requirements are also placed on their quality. Among them, the wall thickness deviation of the square tube is one of the important indicators of its quality, because the wall thickness deviation will directly affect the scope of use of the square tube. In the current increasingly fierce market competition, if a square tube manufacturer cannot work hard on quality If it is impossible to manufacture high-quality square tubes, then the loss of many market shares is inevitable.
There are many square tube manufacturers through decades of continuous efforts and practice, as well as a large number of technical exchanges and actual operation changes with some powerful manufacturers, so that the wall thickness deviation of the square tube has been significantly improved.
In the actual production process, there are some problems in the general square tube: deviation in the perforation process of the punching machine, equipment manufacturing accuracy and structure, installation and adjustment of equipment lines, heating process of tube blank, blanking of tube blank, tool accuracy Influence, the use of automatic rolling mills.
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