SSAW steel pipe into the steel unit, multi-channel roll rolling strip gradually rolled up, a gap is formed with an opening round tube, squeeze rollers reduction adjustment, the weld gap control at 1 ~ 3mm, and the weld ends flush. Spiral Pipe is a strip coil as raw material, often warm extrusion molding, automatic double wire-sided spiral submerged arc welded steel pipe technology.
1, Hardness refers to the metal object is harder to push and the contact surface wear caused by plastic deformation resistance, commonly used test methods Brinell hardness test, Rockwell hardness test, Vickers hardness test.
2, The selection of lubricants, low temperature should be chosen viscosity (low), the load should be selected large viscosity (high), the movement speed should be selected high viscosity (low) it is.
3, Single rod side of the piston in the hydraulic cylinder, piston rod, and therefore the effective active area of the piston cylinder two chambers are not equal, the larger diameter of the piston rod, the effective area of the piston effect greater the difference between the three sides.
4, Steel welded pipe is made blank, have collectively produced welds steel processing line equipment.
5, The applied voltage and the resistance of the metallic conductors irrelevant.
6, The hydraulic system from the power system, execution system, control system, auxiliary system composed of four parts.
7, There are two ways to achieve a rolling bearing preload, ie radial and axial preload preload.
8, Manufacture high precision, complex shape of the blade and cutting tool for steel, the material should be used carbon tool steel.
9, If an object in space without any constraints, there should be six degrees of freedom.
10, does not destroy the performance and integrity by checking material or article, and method for detecting defects is called non-destructive testing.
