1.We have different manufacture technologies for C&Z roll forming line. Following is the best technologies.
1）Punching all holes and cut to length after roll formed.
2）Characteristics of punching all holes and cut to length after roll formed:
A.The holes and length in longitudinal direction has high precision.
B.Save a lot of material.
C.The holes horizontal direction has high precision.
D.Can fit more bad of the strip steel (cold rolled steel strip).
E.It is easy to rectify the twist, arch bending & Lateral bending of purlin.

3)Experience has shown that our latest design which punching all holes and cut to length after roll formed is the best way to make sure the purlin has good quality.

2.The introduction of product design characteristics

2.1 Decoiler: The cantilever style.
2.2 Adopt two rollers for pinching & five rollers for leveling
2.3 Feeding guide stand type：side trolley type
2.4 Screw guide rail, screw guide with high precision ball screw and linear guide rail, the precision of the leadscrew rail is 0.02 mm, degree of hardness of HRC60
2.5 Screw transversal, the guide rail is generally used in machine tool machining center machine tool, now in the cold bending steel on its precision can satisfy completely.

1.Steel coil material: Q235MC – σs=235Mpa
2.Outline of main roll forming: 7M X 2M
3.Outline of installation area: 35MX2M
4.Diameter of roller shaft: ￠70㎜
5.Material of shaft: 42CrMo
6.Hardness of shaft: HRC30°
7.Yield strength of shaft：930 Mpa
8.Tensile strength of shaft：1080 Mpa
9.Diameter of ball screw: 40mm
10.Thickness of coil: 1.5mm-3mm
11.Manual de-coiler: passive de-coiling, manual up tight
12.De-coiler capacity: 4T
13.Frame: steel structure welding parts, high temperature tempering to stress after welding
14.The frame surface coating: shot blast
15.Frame precision guarantee: pentahedron processing
16.Memorial arch bearing: locating surface using axial thrust bearing, to prevent the roller series
17.Pinching motor: 3KW
18.Punching mould: 3 sets
19.Stand type: WHPF45
20.Chain type: 20A-double row
21.Produce speed: 0-12m/min
22.Roller stand: 11 station
23.Length of roller stand: 635mm
24.Hydraulic station motor power: 30kw
25.Pump: gear pump
26.Material of roller adopts high-quality alloyed bearing steel GCR15
27.Quenching hardness of roller: HRC580-600
28.Cutter: adjustable cutter
29.Material of blade: Cr12 MoV
30.Heat treatment of cutting blade: (HRC58°-62°)
31.The shear tolerance: ±2mm

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