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FAQ FRO ANGLE STRAIGHTENING MACHINE

  • Q In December 2025, a Vietnam asked that, can H Beam Welding Machine be made into Smart type? Which means, machine operation can be monitored in remote way, such as at office, through mobile phone or laptop, and welding data can also be checked remotely?

    A The conventional I H Beam SAW Welding Machine does not have such function. If customer need, below upgrade are necessary:
    1. 1) Select digitalized welding power supply. For example, Chinese AOTAI brand;
    2. 2) Equip electric control system of H Beam Gantry SAW Welding Machine with HMI (Human machine interface);
    3. 3) Set up LAN (Local area network) between office, mobile phone, laptop and I H Beam SAW Welding Machine itself. Then, welding data can be shared between on site and remote.

  • Q When Purchasing BOX H Beam Gantry SAW Welding Machine, which Factors should be Considered, and Selecting Criterion on Machine Model?

    A
    1. 1. Machine Performance: Can this machine meet customer requirement?
    Gantry frame I H Beam SAW Welding Machine is good at producing heavy and large steels, especially under the condition of H Beam flange and web have thickness over 60mm to 100mm;
    1. 2. Machine Budget: How much does customer plan to buy the machine?
    Compared with other H Beam production machines, gantry frame I H Beam Welding Machine has the least price, this helps customer buying the machine without much stress;
    1. 3. Quantity: How many sets of LHA does customer need?
    The condition is half and half, which means, over 50% customers choose to introduce 2 sets of I H Beam Gantry SAW Welding Machine into their workshop, to form into a line, this helps making welding operation more fluent and high efficient;
    1. 4. Land Occupation: What is floor area for installing LHA models machine?
    This should be considered when planning on workshop layout for H Beam production, One set of the H Beam Gantry SAW Welding Machine needs around 150m2 area (10m width x 15m length) for installation. Some customers also ask on AutoCAD format machine drawing for making layout on workshop plan.

  • Q What are Technical Characteristics of Wuxi JACK Gantry Frame I H Beam SAW Welding Machine?

    A
    1. 1. Welding modes is usually heavy welding: Large current (working parameters: 550A- 1000A in Single Arc) and voltage SAW Submerged welding, produces H Beam with large welding toe. So, when customers produce heavy H Beam, especially when flange thickness in the range of 60mm to 100mm, H Beam Gantry SAW Welding Machine is good choice;
    2. 2. Welding torches position can be adjusted conveniently and precisely along:
    1. 1) Horizontal direction X axis;
    2. 2) Up and down direction Y axis;
    3. 3) Forward and backward direction Z axis;
    During welding operation, welding arc tracker act with integrated style of pneumatic along horizontal direction, and mechanical along vertical direction, convenient and high precision, so as to get the optimal welding effect;
    1. 3. Welding velocity is moving velocity of gantry frame along the parallel rails, which can be adjusted continuously by means of A.C. inverter, and displayed intuitively in digital display of H Beam Welding Machine operating panel;
    2. 4. Stable Movement of Gantry: Gantry movement is double drive, which means both sides of gantry frame are installed with A.C. driving motors; Besides, At the lateral side of rail there is stop wheel unit, guaranteeing the max. stability of gantry movement, and hence welding torch operation.

  • Q As a Machine Integrating Outsources Units like SAW Welding Power Supplies/ SAW Flux Unit, how does Electric Control System of Gantry Frame H Beam Welding Machine Manage on Reliable and High Efficient Operation?

    A
    1. 1) Electric control system consists of control board and operating panel. Control board is installed on the moving beam beneath gantry, and operating panels are installed on the left and right columns of gantry. By operating pushbuttons, all motion of the machine is realized, also welding parameters can be controlled, fulfilling function as flux recovery, etc.
    2. 2) Machine operating panel is installed together with the 2 control consoles of the 2 sets of SAW welding power supplies, on the horizontal beam of I H Beam Gantry SAW Welding Machine, at the height of adult operator. In this way, operator can control on machine operation at single point, without further movement;
    3. 3) For LHAC models I H Beam Welding Machine, which need 2 operators standing at external both lateral sides of moving gantry, electric control system of the machine has interlock function, that official operation can not be started by either one of the 2 operators, but their work together instead. In this way, reliable operation can be promised, and malfunction can be avoided.

  • Q How to Guarantee Stable and Smooth Movement of Gantry Frame, the Critical Work Action of I H Beam Gantry SAW Welding Machine?

    A
    1. 1. Gantry movement can be shifted between high speed and low speed. It is controlled with A.C. inverter, which rectifies A.C. electricity into D.C. electricity, and then inverts the D.C. electricity back into A.C. electricity of adjustable voltage and frequency. The inverted A.C. electricity then powers A.C. motor, attaining purpose of speed control;
    2. 2. Gantry moving speed (Welding speed) is displayed real time on digital operating panel of I H Beam SAW Welding Machine, in flashing mode. Operator can monitor on this velocity to judge it is proper or not;
    3. 3. During installation of H Beam Welding Machine, levelness of parallel rails for gantry movement should be guaranteed within tolerance:
    1. 1) Levelness of rail on the gantry platform should be kept within≤0.5mm;
    2. 2) Adjust clearance of rail joints at carriage, welding arm and gantry, making clearance between eccentric rollers and rail ≤0.3mm，flexible motion without blockage.

  • Q Please Give Daily and Regular Maintenance and Service Check Points on Gantry Frame I H Beam Welding Machine?

    A
    1. 1. No sundries on rail surface and its both sides. Clean working site regularly, guaranteeing smooth and stable running of gantry;
    2. 2. Adjust clearance of control rollers of rails regularly, to maintain it within stipulated tolerance;
    3. 3. Clean off blockage on the sieve of flux recovery unit regularly, before and after each shift of I H Beam SAW Welding Machine everyday;
    4. 4. Welding tip and wire are insulated from welding head with insulating board. Check prime condition of insulating board regularly, and replace a new one immediately upon defect condition to be found. Prohibit on short circuit;
    5. 5. Maintenance of welding machine please see its manual book, which is provided customer together with manual book of I H Beam Gantry SAW Welding Machine;
    6. 6. Lubrication：
    1. 1) Apply lithium based grease on rolling bearings, replacing once a year;
    2. 2) Apply 30# mechanical oil on reducers, replacing once a year;
    3. 3) Apply 30# mechanical oil on racks, replacing once a week.

  • Q For Customers, When Should Select Sole Purpose, When Should Select Three in One I H Beam Gantry Welding Machine?

    A The factors behind decision making are:
    1. 1) The size of H Beam, especially plate thickness. Here we can say that 40mm is threshold: If H Beam flange and web thickness equal to or less than 40mm, then H Beam 3 in 1 machine is good choice for customer, which can save budget and subsequent running cost. Under the precondition of selecting Wuxi JACK three in one I H Beam Welding Machine, which has capacity of welding and straightening on 40mm thickness. By year 2025, other producers’ produced three in one machines still do not have such strong capacity;
    2. 2) On the other hand, when H Beam flange and web thickness are thicker than 40mm, for example, 50/60/80/100mm, then sole purpose I H Beam Submerged Arc Welding Machine is the only choice for customer;
    3. 3) Customer Budget: Investment on sole purpose I H Beam Welding Machine, involves higher budget than three in one machine, because H Beam Assembly Machine and H Beam Straightening Machine also need to be purchased, as well as supplementary units: 60°/90°/180° Flipping Equipment, the budget difference between sole purpose and 3 in 1 I H Beam Welding Machine is usually 2 times level;
    4. 4) Customer Workshop Floor Area: This has the same reason as the previous one “Customer Budget”.

  • Q What is the Same Point and Difference between Sole Purpose and 3 in 1 I H Beam Submerged Arc Welding Machine?

    A Same Points:
    1. 1) Task: Both machines are for completing SAW welding on I H Beam;
    2. 2) Welding Modes: Both machines adopt with large current SAW (Submerged arc welding) mode. Especially LHC/ LHA/ LHT models, 100% use; PHJ and ZHJ models 3 in 1 I H Beam Welding Machine, over 95% use SAW welding;
    3. 3) Configuration of SAW welding groups are the same: Welding torch/ Position management/ SAW wire feeding unit/ SAW welding flux recovery and recycling unit;
    Difference:
    1. 1) Welding Technology: In sole purpose I H Beam Welding Machine, SAW welding is in the position of H Beam 45° fillet welding, that more than single pass of welding can be performed if necessary, to enhance welding seam, so it is applicable for welding large H Beam; While in 3 in 1 I H Beam Welding Machine, SAW welding is carried out one time, in the position of 0° flat welding, so it is more suitable for welding relatively smaller H Beam;
    2. 2) Welding Torch Work Mode: In LHA and LHT models machine, although with 2 pieces of welding torch, these 2 welding torches are for welding on two pieces of H Beam separately; While in PHJ and ZHJ models three in one I H Beam Welding Machine, the 2 welding torches work on the same piece of H Beam, left and right in symmetry;
    3. 3) Diameter of SAW welding wire is different: In sole purpose machine, it is slightly bigger: Φ4.0/5.0mm; While in three in one machine, it is Φ3.2/4.0mm.

  • Q Why are There LHC/ LHA/ LHT 3 Series of I H Beam Gantry Welding Machine Available for Choice?

    A This is for convenience of customer choice, considering factors of different working site/ customer budget/ workshop floor/ H Beam size, catering on specific application scenario:
    1. 1) LHC model trolley moving machine is deployed in automatic I H Beam Production Line, 4 sets in a row;
    2. 2) LHT and LHA models I H Beam Gantry Welding Machine are usually installed in semi-automatic working site, with more flexible layout;
    3. 3) Further Division: Further on, depending on the max. H Beam web height and number of operators available, there are 5 models of LHA models machines: LHA4Z/ LHA5Z/ LHA55Z/ LHA4C / LHA5C.

  • Q What are Advantages of SAW (Submerged Arc Welding) in I H Beam Welding Machine in terms of Welding Technology?

    A
    1. 1) SAW welding is the No.1 choice in Steel Structure industry. This machine is especially suitable for producing heavy duty I H Beam: Welding toe above 12mm size, need more than one time welding pass, that welding torch can move along the entire length of H Beam back and forth several times, to form large and strong multi-pass welding seam;
    2. 2) Accordingly, welding seam formed has wider cover face, deeper penetration, and higher strength;
    3. 3) Welding Process Parameters: During SAW welding period, welding speed/ current/ voltage can be modulated easily and intuitively, and displayed in real time on I H Beam Submerged Arc Welding Machine control console.

  • Q What is Capacity for Installing LHC/LHA/LHT I H Beam Gantry Welding Machine?

    A This machine requires on large electric capacity at workshop, because of its equipped large current SAW welding machines. The exact required capacity differs based on concrete condition,
    1. 1) From the minimum level of single arc SAW welding, one set of LHA or LHT,
    2. 2) To medium level of single arc SAW welding, four sets of LHC in automatic H Beam Production Line,
    3. 3) To the highest level of tandem arc SAW welding, four sets of LHC in automatic H Beam Production Line;
    Taking for the 12 sets of LHC special design heavy duty I H Beam Welding Machine Wuxi JACK delivered for Russian customer in July and August year 2025 as example, that one set of such LHC model machine needs workshop electric capacity of:
    1. 1) 2 sets of ZD7-1600 D.C. SAW Welding Machines, 84kW x 2= 168kW;
    2. 2) 2 sets of ZDE7-1200 A.C. SAW Welding Machines, 71kW x 2= 142kW;
    3. 3) The LHC machine itself, 5kW;
    Summing up, that just one set of such LHC model large I H Beam Submerged Arc Welding Machine need nominal workshop capacity of 315kW, and actual capacity of 378kW (With 20% fluctuation tolerance). And there are 4 sets of such large machine in one line of automatic H Beam Production.

  • Q What is standard on Distinguishing medium duty H Beam for Welding 3 in 1 H Beam Machine, and heavy duty H Beam for H Beam Production Line?

    A
    1. 1) There is no explicit definition and distinction between medium and heavy duty H Beam in Steel Structure industry. In common practice, 12mm toe height welding seam is the threshold for distinguishing heavy and medium duty H Beam;
    2. 2) Three in One Integral Function H Beam Welding Machine can complete 12mm welding toe on finished H Beam with single time welding pass; For heavier duty workpieces with 12mm bigger welding seam, H Beam Gantry SAW Welding Machine should be used, which can be referred to as “heavy welding”;
    3. 3) The 2 machines have different welding orientations when welding on H Beam, 0° versus 45°.

  • Q What is Welding Mode adopted in Wuxi JACK Three in One Integral Function H Beam Welding Machine?

    A
    1. 1) Majority of welding 3 in 1 H Beam Machine is equipped with single arc 1000A SAW (Submerged arc welding), which is applicable for producing 10mm ~ 40mm thickness flange and web;
    2. 2) When producing small thickness H Beam, namely 3mm to 10mm, the more proper welding mode is 500A CO2 GMAW;
    3. 3) When customers seek on the Max. welding efficiency, twin arc/ tandem arc SAW is considered configuration: A.C.1250A and D.C.1200A. The downside of such choice is high cost on machine purchase: 4 sets of welding power supply compared with 2 sets;
    This is featured function of Wuxi JACK assembly welding straightening H Beam 3 in 1 Production Machine.

  • Q What is Recommended Welding Process Parameters, in Wuxi JACK Three in One Integral Function H Beam Welding Machine?

    A
    1. 1) Welding Current: When working in SAW welding model, for flange and web thickness 20mm~ 30mm, the suggestive welding current is around 550~ 750A; When working with CO2 GMAW on 5mm to 6mm thickness, 350A welding current is often adjusted;
    2. 2) Welding Speed: Customers care on this parameter the most, because it directly determines H Beam productivity. Although some producers claim on 1700 to 1800 mm/min., the proper Max. welding speed should be 1200 mm/min., this is determined by welding technology, not the welding 3 in 1 H Beam Machine itself. Too high improper welding velocity will lead to insufficient welding seam fusion, and thus inferior welding quality.

  • Q What is Application Form of Assembly Welding Straightening H Beam 3 in 1 Production Machine?

    A There are two primary common seen ways of deployment on welding 3 in 1 H Beam Machine:
    1. 1) Installed and operated as individual equipment. Some customers purchase single set machine, some customers purchase two or more sets, but all in the way of individual. So, in the case of two or more machines, these machines are installed certain distance apart, to fulfil different jobs;
    2. 2) Composed into new type of welding H Beam Production Line, different from conventional lines. This new line is composed of 2 sets of three in one Integral Function H Beam Welding Machine, in the form of staggered straight line at workshop, with deviation of conveyor width. In this way, H Beam welding can be completed with its moving through the 2 sets of machines in a row. For the purpose of saving labor intensity, some customers also ask on group of hydraulic drive 90° Overturning Table, to be situated between the 2 sets of welding 3 in 1 H Beam Machine.

  • Q Why T Beam H Beam is Orientated in Vertical, during its Manufacture, in Assembly Welding Straightening 3 in 1 H Beam Machine?

    A
    1. 1) This is the questions often raised by South Asia customers, especially Indian customers. By the time end of 2025 year, every time Indian customer inquired on welding H Beam 3 in 1 Production Machine, they asked this question;
    2. 2) The reason may lies in the way of their H Beam production, which is based on American standard, that H Beam is situated in horizontal, and fairly percentage of conditions, H Beams are welded only with single side, the opposing side is not welded;
    3. 3) Comparatively, in other countries and regions including China, H Beams are usually produced in vertical way, that H Beam will be flipped 180° one time in the process, to weld on its both sides. This is popular way of process technology being applied in three in one Integral Function H Beam Welding Machine.

  • Q Are There any Details that Easily to be Neglected by Customers when Purchasing 3 in 1 Integral Function H Beam Welding Machine?

    A Yes, although customers usually spend long time investigating on machines before purchase, they are not insiders, and sometimes may encounter manufacturers, that although looks good proposal is proposed, some details are not mentioned or underlined in purpose, which, in the stage of purchase it looks unimportant, but plays key role in subsequent official running;
    In the case of Assembly Welding Straightening 3 in 1 H Beam Machine, some examples on this aspect, from year 2009 to end of year 2025:
    1. 1) Straightening capacity on H Beam flange thickness: Although very often seen H Beam plate in the thickness around 20mm, which looks acceptable at the beginning, but imagine on in the following 10+s year machine service life, that customers will inevitably come across producing on 30 to 40mm thickness H Beam, and only Wuxi JACK produced assembly welding straightening H Beam 3 in 1 Production Machine can fulfil such task;
    2. 2) Capacity of SAW Flux Hopper: Yes, this is an even nuisance technical index, that if not emphasized, over 95% customer will not pay attention on it. A real case is, in this year 2025, Wuxi JACK had a Columbia customer, who planned to purchase the 2nd set of their three in one Integral Function H Beam Welding Machine. 10 years ago they bought their first set from another Chinese company, that capacity of SAW flux hopper is only 50kg. This time, they took lessons, and noted that Wuxi JACK equipped capacity is 100kg for our SAW flux hopper;
    “Detail determines excellence”, the above 2 technical data, and other technical characteristics of our welding 3 in 1 H Beam Machine, help us winning this South American customer in Aug. 2025 year.

  • Q What is Welding Technology Trend of 3 in 1 H Beam Assembly Welding Straightening Machine?

    A
    1. 1) From year 2009 to today in Nov. 2025, welding technology of 3 in 1 Vertical H Beam Welding Machine has undergone series of changes and development, to meet on wide variety of customer demand. The overall trend is from single choice of single arc SAW welding, to multitude options of welding mode, because H Beams have wide variety, and different customers have different requirement on productivity/ cost, etc.;
    2. 2) Currently the major welding mode in 3 in 1 Vertical H Beam Welding Machine is still single arc SAW, which has advantages of reasonable cost/ stable performance/ easy operation, and over 80% of application scenario;
    3. 3) Besides, there are other types of welding mode to satisfy customer specific demand, including: Twin Arc SAW/ Tandem Arc SAW/ Single Wire GMAW/ Tandem Wire GMAW/ Mixed Single Arc SAW with Single Wire GMAW, these welding modes can produce special specifications of H Beam for customers.

  • Q What is Electric Control Mode of 3 in 1 Vertical H Beam Welding Machine?

    A
    1. 1) Electric control system of conventional 3 in 1 Vertical H Beam Welding Machine has core elements of A.C. inverter, which controls integral working velocity of assembly/ welding/ straightening; There is no PLC (Programmable logic controller) involved, as in the case of H Beam Assembly Machine, because no need. The welding seam of H Beam produced from 3 in 1 Vertical H Beam Welding Machine is continuous, just like H Beam Welding Machine;
    2. 2) On the other hand, there are some customers who have special requirement on function of machine. For example, in Oct. 2025, there is Cambodian customer, when they placed order on 2 sets of ZHJ15 model 3 in 1 Vertical H Beam Welding Machine, they requested the machine to be capable of carrying out intermittent welding. For this purpose, Wuxi JACK electric engineers have A.C. inverter to be part of electric control system.

  • Q What is Technique Evolution of 3 in 1 H Beam Assembly Welding Straightening Machine?

    A
    1. 1. Background on evolvement of 3 in 1 Vertical H Beam Welding Machine is to replace H Beam Welding Production Line, in the field of producing small to medium sized H Beam, so as to save cost and raising productivity for customers. It begins from year 2005, come into mature business product in 2009 pushed by Wuxi JACK, and has undergone many variations over the past 16 years, to today by end of 2025, and still sees diversification on its target customer. In other words, this 3 in 1 Vertical H Beam Welding Machine has gradually sees division on market;
    2. 2. The major diversification on design and technique of Assembly Welding Straightening 3 in 1 Vertical H Beam Welding Machine mainly embodies at below 3 aspects of:
    1. 1) Machine Main Structure: There is great difference, between Wuxi JACK machine, compared with that of other producers. In a word, Wuxi JACK machine has much more strong and durable mechanical structure, which have been proved by customers investigation and feedback;
    2. 2) Machine Control Mode: Majority of Wuxi JACK 3 in 1 Vertical H Beam Welding Machine works as individual equipment; On the other hands, some customers purchase 2 or more sets of machine, sometimes equipped with 180° overturning table, to compose into an automatic H Beam production line, this can greatly increase productivity;
    3. 3) Welding Mode: As introduced in question on “Welding Technology Trend”, welding modes of 3 in 1 Vertical H Beam Welding Machine also undergoes great development with 16 years time.

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