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ZTF Forming Process

ZTF is a kind of forming technology developed by Zhongtai Company in 2005, which absorbed advanced technology from both domestic and international, and then won "Technology Innovation Award" by China Cold Forming Steel Association.

I. The concept of ZTF forming technology?

ZTF is a kind of forming technology developed by Zhongtai Company in 2005, which absorbed advanced technology from both domestic and international, and then won “Technology Innovation Award” by China Cold Forming Steel Association.

ZTF Forming Technology Advantages:

1) Cut down roller changing time, breakdown section does not need to change rollers . And it can cut-down producing period.

2) Saving about 60% cost on the rollers

3) Release labor intensity.

4) Roll forming technology, the caliber is different and propitious for high steel grade such as X70,N80 .

5) The steel strip is bended more reasonably, to reduce the friction between the strip and roller, and also reduce the waste of the roller.

6) It is easier to restore and adjust roller.

II. What is breakdown section and what is fin-pass section?

Normally, we part the mills as forming section and sizing section.

The section before guild-frame is forming and the rest part is sizing section.

For ZTF, we divide forming section into breakdown section and fin-pass section. The part after the unit of vertical rolls is fin-pass section and before is breakdown section.

III. Where is ZTF technology used?

ZTF technology is used in breakdown section and only suit to produce round pipes.

VI. The development of ZTF technology

The Comparation Among Four Generations of Our Pipe Forming Technology

“ZTF-1”, “ZTF-2” , “XZTF-3” and “XZTF-4”

TechnologyZTF-1ZTF-2XZTF-3XZTF-4
Adjustment MethodManualManualElectricElectric
Rolls in Breakdown sectionBasically Common UseFully Common UseFully Common UseFully Common Use
Structure and Adjustment of
   Rotating Horizontal Rolls
No Horizontal RollsManually adjust the rotating, opening & closing and lifting of upper rolls, the lower rolls opening& closing on the shaft. Manually adjust quick release or adjustable mats.Electric adjust the rotating, opening & closing and lifting of upper rolls , tilting lower rolls opeing& closing on the roll seats. Electric adjust the the space between rolls which is controlled by screw.Electric adjust the rotating, opening & closing and lifting of upper rolls.  Computer adjust the tilting of the lower rolls opening& closing on the roll seats, the space between rolls which is controlled by screw
Structure and Adjustment of Swiveling Vertical RollsManually control the adjustment for the opening & closeing, lifting and rotating of the special curve rolls.Manually or electromotion control the adjustment for the opening & closing, lifting and rotating of the special curve rolls.Electric control the adjustment for the opening & closeing, lifting and rotating of the special curve rolls.Computer control the adjustment for the opening & closeing, lifting and rotating of the special curve rolls.
Adjustment of Other Rolls in Roughly Forming SectionRollers shall be replaced when producing new size of pipe.The rolls open and close on the shaft, manually adjust the quick release and the adjustable mats, the lifting the upper rolls.The rolls open and close on the shaft or roll seats, manually adjust the space between rolls which is controlled by screw, the lifting of the upper rolls.The rolls open and close on the shaft or roll seat. Electric adjust the space between rolls which is  controlled by screw. Computer adjust the lifting of the upper rolls.
Micro-adjustment Device for Side Vertical Rolls in Final Forming and Sizing SectionN/AN/AYesYes
Adjustment for Rolls PositionManualManualManualComputer
Request for Electronic ControlLowLowHighHigher
Accuracy of Rolls Position AdjustmentHighHighHigherHighest
Operation Site of Rolls position AdjustmentInside the standsInside the standsOutside the standsOutside the stands
Deformation of the Pipe Blank EdgeGoodGoodBetterBetter
The Formation for High Rrecision, High Steel Grade and Thick Wall PipeGoodBetterBestBest
Accuracy of PipeHighHighHigherHigher
Labour IntensityHighHighLowVery low
Time for Replacing RollsLongShortShortShortest
Online AdjustmentNormalNormalGoodGood


ERW Product List

ModelRound pipe (mm)Square pipe (mm)Thickness (mm)Working spead (m/min) 
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