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FAQ FRO ANGLE STRAIGHTENING MACHINE

  • Q What are Advantages of Open Frame I H-beam Gantry SAW Welding Machine?

    A
    1. 1) One Size fits for All: Because there is no confinement on placement of workpiece (BOX I H Beams) in open structure, so, size range of applicable workpieces has great extensive range than enclosed gantry frame types machines. In other words, when customer plan to produce new batch of H Beam, they do not need to fret over whether the current open structure I H-beam Welding Machine is applicable or not;
    2. 2) So, any sizes of H Beam, from the smallest web height 200mm, to the max. web height 2000mm, can be placed into LHC or LHT open frame machines;
    3. 3) Besides, other common seen steel structure workpieces, especially BOX Beam, can also be welded in open structure machines;
    4. 4) When customer plan to introduce new types of workpieces, say, long pipe/ post... the existing open structure machine can also be used without or with very few modifications on the existing machine.

  • Q What are Welding Mode and Operation in Open Structure H-beam Gantry SAW Welding Machine?

    A
    1. 1) Major Welding Mode: 45° fillet SAW welding is the No.1 choice to be implemented in all models of machine. And, among this, majority is with single arc SAW welding; When customer need higher welding velocity, or thickness of H Beam flange and web are larger than 60mm, tandem arc SAW should be used;
    2. 2) Promise Heavy Welding: The strongest point of sole purpose I H-beam Welding Machine is to get solid welding seam formation in fabricated BOX T I H Beams, which guarantees sufficient penetration depth/ broad cover face of formed welding seam on finished workpieces;
    3. 3) Mature Welding Technique: SAW and other types of welding is managed by means of professional welding power supply (Single/ twin/ tandem arc welding machines), together with system of assistant welding operation, including welding torch position detect and control, welding wire feeding and straining unit, etc.;
    4. 4) Welding velocity is managed with A.C. inverter, and displayed real time intuitively in digital meter of machine operating panel.

  • Q What are Supply Range of Various types of I H-beam Welding Machine, including LHA series Gantry Frame, LHC model Trolley Column, and LHT model Open Structure?

    A
    1. 1. This is a good question, that often neglect by customer and supplier company, and sometimes cause controversy. For example, in end of December 2025, when a Vietnam customer communicated with Wuxi JACK on LHA model H-beam Gantry SAW Welding Machine, we forgot to remind customer that, the 18m long parallel rails for gantry movement is not included supply range, because unlike rails of CNC Flame Plasma Cutting Machine, which need to be machined, for rails of I H-beam Welding Machine, the parallel rails do not need to be machined, do, it is not in scope of supply. This is common practice, but need to confirm with customer when making quotation;
    2. 2. Basically, supply scope of all types of I H-beam Welding Machine:
    1. 1) Mechanical main frame, including motor drive moving trolley for LHC, gantry frame for LHA, and T frame open structure for LHT;
    2. 2) SAW welding system, including different types of welding machines, welding torch mechanism, supplementary welding units, flux conveying and reuse machines;
    3. 3) Drive and transmission system on mechanical main frame;
    4. 4) Electric control system of machine;
    1. 3. Unless specifically designated by customer and negotiated accordingly, supply range of I H-beam Welding Machine do not include:
    1. 1) 2 arrays of triangular H Beam support rack;
    2. 2) Parallel rails for frame movement;
    3. 3) Cable overhang racks;
    But we provide drawing of these items for customer producing these items. The reason we do not provide these items is, it is easy to produce, but have large size and heavy weight, which will greatly increase logistic cost of I H-beam Welding Machine. To save freight charge on the machine for customers, we exclude these items from supply range of the machine.

  • Q How Many Operators are Necessary for Running on I H-beam Gantry Welding Machine?

    A This is another important question customer concerns during machine purchase analysis, and actually differs based on practical condition at customer site. the major factors affecting number of operators include:
    1. 1) Model and design of machine. For example, for LHA series H-beam Gantry SAW Welding Machine, there are 2 branches of: LHAC lateral operating type, which usually need 2 operators work on one machine; While one operator is sufficient for working on LHAZ middle operating type;
    2. 2) Quantity of machines on site: Especially for I H-beam Welding Machine, very often customer purchase more than one set of machine: For LHC model at automatic H-beam production line, usually 4 sets in a line; For LHA series gantry frame moving and LHT model open structure T frame I H-beam Gantry Welding Machine, one or two sets are installed in H Beam production workshop. Under ideal condition, one operator can take care on operation of 2 machines simultaneously, which can raise productivity;
    3. 3) Operator Proficiency: This is another controversy sometimes happened during business exploration. For example, also in end of December 2025, the Vietnam customer discussed with Wuxi JACK engineer on how many operator is necessary for operating on PHJ and ZHJ series 3 in 1 I H-beam Welding Machine. The Vietnam customer questioned on whether only one operator is capable of working on one set of the 3 in 1 machine, he told us that, in Vietnam factories, customer manager arrange on 2 operators to work on the machine: One as lead and one as main; On the other hand, from Wuxi JACK perspective, if operator is proficient, only one people is sufficient for managing on the 3 in 1 I H-beam Welding Machine.

  • Q Why Customers from Steel Structure and Other Manufacturing Industry need Pipe BOX H Beam End Face Milling Machine?

    A
    1. 1) After being fabricated into shape, these steel structure workpieces: H Beam/ BOX Beam/ Cross Beam/ Pipes... Have certain degree of foreign debris/ rust on it, which should be cleared away, for the ease of next step joint;
    2. 2) Besides, end face of these working parts should be machined into eligible level of roughness and gloss, for carrying out next step of process technology, such as Assembly/ Painting;
    3. 3) All these goals should be completed with end face milling operation, on these workpieces.

  • Q Which kinds of Workpieces can be end polished in Wuxi JACK Steel Structure Pipe BOX H Beam End Face Milling Machine?

    A
    1. 1) All kinds of welding steel structure members: H Beam/ BOX Beam/ Cross Beam/ Pipes/ Special shape parts...;
    2. 2) The sizes of these workpieces can be from several hundreds millimeters height; up to 6000mm height;
    3. 3) From several hundred kilogram weight, to a hundred ton weight;
    4. 4) From common seen end face shape, to any special type;
    5. 5) All these workpieces can be machined in different models of Wuxi JACK Pipe BOX H Beam End Face Milling Machine.

  • Q What are Competitive Advantages of Wuxi JACK Steel Structure Pipe BOX H Beam End Face Milling Machine?

    A The leading edges of Wuxi JACK machine are full around:
    1. 1) Technical Advantages: Delicate design, excellent and sturdy workmanship, the top grade outsourced parts, superior performance, user friendly operation;
    2. 2) Business Advantages: The shortest lead time thanks to large customer order and hence lean production, the most reasonable quotation, and consummate after sale service;
    3. 3) Application Advantages: Full line of models to choose from: Light/ Medium/ Heavy duty/ CNC control Pipe BOX H Beam End Face Milling Machine/ Milling and Facing Center.

  • Q What are Featured Products of Wuxi JACK Steel Structure Pipe BOX H Beam End Face Milling Machine?

    A Besides the first class product of conventional standard models, like DX1520/ DX1215/ DX2040.... Wuxi JACK also provides for customers 2 groups of our featured product in Steel Beam End Face Milling Machine family, which by year end of year 2025, currently only Wuxi JACK can supply these machines for customers:
    1. 1) Heavy duty large models, especially from DX4080 to DX6080;
    2. 2) CNC models, which entails advanced technique of both hardware and controlling software.
    These 2 groups are very rare available in the industry, because it involves strong strength of supplier. Wuxi JACK has rich experience and strong capability in this field.

  • Q Is it Dangerous or Harmful to Health on Operating Wuxi JACK Steel Structure BOX H Beam End Face Milling Machine?

    A Operation properly, operator can have a safe operation in this machine. Wuxi JACK engineers always take safety as the first priority, when designing these machines. We takes series of measures, to fully protect operator against all hidden risks: Either remove it, or, in the case of can not remove, give the best protection. For example:
    1. 1) Protection covers on horizontal machine bed and upright column;
    2. 2) High quality milling head, with the least degree noise level;
    3. 3) Alarm system on mal-function;
    4. 4) Poka-yoke (Error proof) design on end face milling operation, etc.

  • Q Can you give a quick review on major Strong Points of Wuxi JACK Steel Structure BOX H Beam End Face Milling Machine, compared with other competitors?

    A 1, Milling Head: Wuxi JACK adopts with Chinese mainland produced 7.5kW HD750, Other company selects TX-32A, which is also produced in Chinese mainland, but with much inferior quality than HD750:
    1. 1) TX-32A is originally 5.5kW. The 7.5kW is only nominal power, not actual;
    2. 2) For adjusting on milling head spindle revolutionary speed, the TX-32A need to be uncovered and replacing gear, time consuming and inconvenient; While HD750 just turning on handwheel on cover of milling, convenient and highly efficient.
    2, Guiderail on Machine Bed and Upright Column:
    Wuxi JACK Steel Structure BOX H Beam End Face Milling Machine adopts with Heavy duty High Precision Guiderail,
    10 times manufacturing cost of other suppliers’ welding type ordinary guiderail
    3, Quantity of A.C. Inverters:
    Wuxi JACK Steel Structure BOX H Beam End Face Milling Machine adopts with 2 pieces of A.C. inverters. So, milling can be implanted along both horizontal and vertical direction simultaneously, and can mill on slant trace accordingly; Other suppliers only with 1 piece of A.C. inverter. So, milling can be implanted only along horizontal direction;
    4, Dimension of Upright Column:
    Cross section size of upright column in Wuxi JACK Steel Structure BOX H Beam End Face Milling Machine, is 10% larger than that of other companies. So, Wuxi JACK machine has much more rigidity than other company machines.
    5, Hydraulic System:
    Hydraulic system of Wuxi JACK machine is sourced from more renowned and professional suppliers

  • 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.

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