HJ-300 Hydraulic Heavy Duty Lengthwise H Beam Straightening Machine
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HJ-300 Hydraulic Heavy Duty Lengthwise H Beam Straightening Machine

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HJ-300 Lengthwise H Beam Straightening Machine is the largest of its kind for straightening H Beam, BOX Beam, steel structural members and other types of Section Steel along its length direction. With its biggest tonnage, we give name on this model of the equipment as heavy duty lengthwise structural member straightening machine.


 

  1.  Empirical Data on Relationship between Tonnage and Workpiece Size

       As introduced in previous section of HJ-series, there is rule of thumb accumulated by us with the original 

      development data, and years of experience:

Model

Max. Tonnage of Press (Ton)

Max. H Beam Size that can be   Straightened (mm)

Web Height

Web Thickness

Flange Width

Flange Thickness

HJ20

20

400

10

200

12

HJ100

100

500

12

400

20

HJ200

200

600

30

500

35

HJ300

300

800

32

600

40

 

    - From the above list of specifications we can check that HJ300/HJ200 hydraulic lengthwise H Beam 

        straightening equipment is for straightening middle-size workpiece;

    - HJ100/HJ20 hydraulic lengthwise H Beam straighten machine is for straightening small-size workpiece;

    - For large size workpiece, usually deform along its longitudinal direction is not so obvious to be necessary for

      straightening;

    - Besides H Beam, as introduced in previous section, the equipment can also be used for straighten other 

      section steels and structural members. The applicable size of these workpiece please take reference on the

      above table also

 

  2. Specification of Equipment

     Below are main specifications and technical parameters of HJ300 hydraulic lengthwise H Beam straighten

     equipment:

    1) Conveyor motor 1.5kW *2

    2) Driving cylinder:

       - Cylinder diameter 400mm

       - Rod diameter 320mm

       - Stroke 800mm

   3)  Hydraulic system

     -  Driving motor:      22kW

     -  Rated work pressure:25MPa

     - Max. system pressure:32MPa

      Among these data, the variable parameter is power of hydraulic driving motor. For the other models of this

     series of hydraulic lengthwise I Beam straightening machine, it is listed as below:

     - HJ200: 11kW;

     - HJ100: 7.5kW;

     - HJ20:  3kW


  3. Some Explanations on Use of the Equipment

 Please check below lateral view of the machine:

3- Lateral view

  1) This HJ-series is a general-purpose machine for various kinds of section steels, so it can be called as hydraulic

      lengthwise Section Steel straightening machine, also;

   2) Itcan not be in common with HYJ/YTJ series H Beam flange straightening machine. Which means, if a welding

       H Beam has both deform on its flange and along its lengthwise direction, it could not straighten the 2 types of

      deform with either one of the 2 series of machine only. In other words, under such condition, both the HYJ/YTJ

      series and HJ-series hydraulic lengthwise I Beam straighten equipment should be used;

   3) Meanwhile, for the H Beam after SAW welding,

      - Usually deform along its lengthways direction is not as obvious as flange deform;

      - Or, we can say that in many conditions deform along length direction is acceptable, and do not need to be 

        straightened;

     - This is the reason HJ-series hydraulic lengthwise I Beam straighten equipment does not see as wide 

        application as the HYJ/YTJ-series H Beam flange straightening machine;

     - So, we can see HJ-series is not a must for welding H Beam production. Whether need to purchase it depends

        on 2 factors,

  •  One is deflection condition of workpiece along its lengthwise way;

  • The other is specific request on levelness of workpiece along its lengthwise direction

     - This HJ-series hydraulic lengthwise H Beam straightening machine can not only be used for straightening, but

       also bending the workpiece along its lengthways direction. Which means, it can press the workpiece into a 

      curve or radian along longitudinal way. This is another reason it is a kind of universal equipment.

 

For operating process of HJ-series hydraulic automatic lengthwise H Beam straighten machine, please check next 

section of HJ200.


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