Preparation of the steel reinforcement

The upvc window steel reinforcement, is processing by the Steel Reinforcement Rolling Machine, installed steel reinforcement cavity of PVC-U profiles, which is performs the following functions:

(1) To enhance the rigidity and strength of windows and doors

(2) To prevent the profile's deformation

(3) lb fasten the hardware installed.

The fit clearance between the steel reinforcement and steel reinforcement cavity is 1±0.5mm, to ensure installation convenience and restoration to former shape after being exposed to wind pressure. The allowance for exterior dimension is between 一0.1~0.5mm when machining the steel reinforcement.

The shape of steel reinforcement is designed in accordance with the profile's inner shape as well as the requirements on hardware installation and is generally classified into closed rectangle, U, semi-closed U, square, round, etc.

The steel reinforcement should have flat interior and exterior surfaces and be free from cracks, lamination, joint welding defects, etc. The slot inclination at twp ends of the steel reinforcement should be less than 7 with a clear-cut exterior shape, clear angle and free from burrs.

The steel reinforcement should be cut by the cutting machine ,When cutting the steel reinforcement, it is suggested to cut 45 °at two ends of the steel reinforcement, with an allowance of ±1°. The steel reinforcing must end 10-60mm before the weld inside edges and have screws approx 70mm before the inside edge, to ensure that the hardware's connecting screw could be fixed on the steel reinforcement,with the hardware's sturdiness strengthened.

The steel reinforcement must be aligned after cutting to ensure that the ends are free from burrs and each linear meter has its linearity less than 1.5mm, torsion degree less than 1°, angle deflection less than ±1.5°, and internal angle radius less than 1.4t (t is the wall thickness).

The upvc window steel reinforcement, installed steel reinforcement cavity of PVC-U profiles...

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