FAQ FRO ANGLE STRAIGHTENING 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.

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°.

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.

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.

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.

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.

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 2^nd 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.

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.

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.

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.

A

1. 1) This question was raised by a Moscow customer in Aug. 2025. When their ordered PHJ20 model 3 in 1 Vertical H Beam Welding Machine being installed at end user facility, put into trial run, they find the first 2 segments of outfeed conveyor roller tables can be lifted up within certain stroke, under the drive of hydraulic oil cylinders. Customer asked Wuxi JACK on its purpose;
2. 2) The reason is, after large current SAW welding, in 3 in 1 Vertical H Beam Welding Machine, longitudinal ways of H Beam will have temporary bending up, under effect of SAW welding heat input. To reliably holding up this bent H Beam, outfeed roller tables of machine should be able to raised up a little. After H Beam cooling down, its longitudinal body will restore to normal straight shape, the outfeed roller tables can drop down accordingly.

A For customers, this is easy and cost saving task, compared with introducing traditional H Beam Production Line of separate machines. The major steps are:
1, Plan out an area of 600m² (38m length by 16m width) for machines installation;
2, Purchase the 2 machines necessary, in sequence of process technology:

1. 1) CNC Flame Cutting Machine: Some customers also require on plasma cutting function on it;
2. 2) 3 in 1 H Beam Assembly Welding Straightening Machine;

3, Before installing these 2 machines, making sure utility, especially electric power grid of workshop has sufficient capacity, to accommodate on the above 2 machines. We have an Argentina customer, they bought these 2 machines from Wuxi JACK in Oct. of year 2024, finished installation in March 2025, and found their electricity was not so sufficient. This customer enhanced their power capacity in July 2025 for running on the 2 machines.

A

1. 1) First, Wuxi JACK produced 3 in 1 H Beam Assembly Welding Straightening Machine has very stable high stand performance on daily operation, benefitting from innate delicate design / superior quality control/ Continuous improvement/ Rich experience. Operation and service properly, there should be very seldom malfunction with our 3 in 1 Vertical H Beam Welding Machine. This is validated by hundreds of customers worldwide over the past 16 years, from year 2009 to year 2025;
2. 2) To achieve foolproof measures, we also prove list of common trouble shooting methods, give failure phenomenon/ possible cause/ recommended solution, in manual book of the 3 in 1 Vertical H Beam Welding Machine. This can help customer quickly identify trouble and solve it in high efficiency;
3. 3) As last resort, if customer can not solve problem by themselves, Wuxi JACK engineer team is always available for supporting customer. But we never have such moment (Give technical support on trouble shooting our 3 in 1 Vertical H Beam Welding Machine), thanks to superior and steady performance of our machine.

A

1. 1) This question was raised by a Moscow customer in Aug. 2025. When their ordered PHJ20 model 3 in 1 Vertical H Beam Welding Machine being installed at end user facility, put into trial run, they find the first 2 segments of outfeed conveyor roller tables can be lifted up within certain stroke, under the drive of hydraulic oil cylinders. Customer asked Wuxi JACK on its purpose;
2. 2) The reason is, after large current SAW welding, in 3 in 1 Vertical H Beam Welding Machine, longitudinal ways of H Beam will have temporary bending up, under effect of SAW welding heat input. To reliably holding up this bent H Beam, outfeed roller tables of machine should be able to raised up a little. After H Beam cooling down, its longitudinal body will restore to normal straight shape, the outfeed roller tables can drop down accordingly.

A

1. 1) In theory, yes. But in practical condition, very seldom customer do in this way, and we do not recommend such practice either. The reason is, compared with H Beam Gantry Welding Machine, which welds on H Beam with 45° welding, with to and from several times welding, and can produce welding toe size of over 12mm, in this 3 in 1 H Beam Welder Machine, welding is usually performed only one time on H Beam, confined from its structure and way of operation; Besides, H Beam is in position of vertical, so the max. welding toe size is up to 10mm;
2. 2) The advantage of 3 in 1 H Beam Welding Machine lies in its integration, that it combines assembly and straightening function together with welding, so as to produce small and medium I H Beam with single machine, not welding capacity.

A There are mainly 3 types of welding in 3 in 1 H Beam Welder Machine:

1. 1) Single Arc SAW: This is absolutely the No.1 choice, applicable for over 90% of application cases, the default configuration in machine. This welding mode has good points of: Stable performance, lower running cost, high efficiency, easy operation;
2. 2) Twin Arc SAW: This is attributed as personalized SAW welding mode. Utilizing double wires of Φ1.2-1.6mm, this welding mode can raise welding speed of around 20%, and get longer welding seam. However, it has serious negative point: That twin arc is easy to have its welding wire entanglement during feeding in, because of small diameter and hence insufficient strength of welding wire, which lead to machine shut down;
3. 3) CO₂ Gas Shielded Welding: In 3 in 1 H Beam Welding Machine, this welding mode is used for producing small thickness H Beam, with flange and web of 4-8mm thick, the height and width of H Beam is also correspondingly smaller. The welding torches need to have water cooling unit during operation;

Sometimes, although not often seen, some customers select to have their 3 in 1 H Beam Welding Machine being equipped with more than one type of welding: Single arc and twin arc together for SAW; Or, single arc SAW together with CO₂ GMAW. Of course, this will add on total price of machine.

A

1. 1) First, in 3 in 1 H Beam Welding Machine, welding technique in flat fillet welding: The welding torch is in the position of 45°, performs welding with finished seam of triangular shape. The welding is implemented only one time on H Beam;
2. 2) Second, there are many factors affecting on welding quality: Quality of welding power supply, operation correctness (Process parameters set up, and torch position adjustment), which is determined by customer and supplier on 3 in 1 H Beam Welder Machine respectively;
3. 3) Sum up, welding seam quality can be judged with: Infusion of welding seam; Cover surface and lines; Welding splashes.

A This is another practical question. Generally speaking, 2 criterions help customer make the best choice:
1, How much percentage of their H Beam are non-symmetric? If there are many, should select PHJ; If no or very small, then choose ZHJ;
2, The max. size H Beam. Generally speak, PHJ produces a bit larger H Beam than ZHJ;
3, Price of PHJ is 5% higher than ZHJ counterpart.

A

1. 1) Workshop Land Space: H Beam Welding 3 in 1 Machine has compact dimension. For example, the No.1 selling volume model ZHJ15, one set of the machine occupies land area of: 41m length x 9m width = 360 m²;
2. 2) Workshop Height: One set of Wuxi JACK ZHJ15 has height of 4.9m. There should be traveling crane overhead, for hoisting flange/ web/ T Beam onto and off conveyors. Caution on height of machine, we had encountered such case at May 2025: One set of PHJ20 was delivered to Russian customer workshop, which has total height of 5.3m, this conflicts with travel crane. They worked together us to solve the problem;
3. 3) Installation of 3 in 1 H Beam Fabrication Welding Machine involves foundation prepare. For which we will provide foundation drawing to customer during machine production;
4. 4) Sufficient Electric Capacity: Power of one set of ZHJ15 is around 20KW, together with 140KVA 2 sets of welding power supply. Be sure to maintain sufficient capacity of electricity. In Sep. 2025 we have an Argentina customer, who expanded their workshop capacity, to accommodate on our ZHJ15 model 3 in 1 Vertical H Beam Welder Machine.

A Compared with H Beam Production Line, the advantages of 3 in 1 H Beam Fabrication Welding Machine not only reflected in period cost of investment budget and workshop floor, but also subsequent everyday operation:

1. 1) Number of Operator: From 4 people (Work on assembly, welding, straightening 3 machines respectively, and 1 as logistic and backup) to 1 people working on 3 in 1 machine;
2. 2) Utility: Electricity, power of H Beam Welding 3 in 1 Machine is 20kW;
3. 3) Hydraulic/ mechanical oil to be replaced periodically;
4. 4) Consumables: SAW welding wire and flux, this costs main during production. Consumption depends on H Beam plate thickness.