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FAQ FRO ANGLE STRAIGHTENING MACHINE

  • Q Will H Beam Flange Straightening step affect (Cause defect) on welding seams, produced from H-beam Welding Machine?

    A This is another often asked question from customer, from year 2009 to 2026. For example, in September 2026:
    1. 1) From a customer: We are concerned that when H-beam passes through the straightening machine, the straightening process could potentially cause microcracks in the welds. Our engineers have recommended that, if possible, H-beam should be preheated with torches before passing through the straightening machine. Is it possible to add automatic preheating torches to H-beam straightening machine, so that the preheating process can be carried out automatically before H-beam enters the straightening section?
    2. 2) Wuxi JACK answer:
    1. a) No need preheating. There will not microcracks in welding seams during straightening, because welding seam is stronger than base material;
    2. b) H Beam straightening is for correcting plastic deformation of flange, no harm on H Beam strength, and no harm on welding seams.

  • Q What is FAT (Factory Acceptance Test) on Wuxi JACK H-beam Submerged Arc Welding Machine before delivery?

    A
    1. 1) During internal commissioning following H-beam Welding Machine assembly, Wuxi JACK test on performance of the entire SAW system, including:
    1. a) The SAW welding power supply, its control console, under welding mode of Single Arc/ Twin Arc/ Tandem Arc SAW;
    2. b) The welding torch mechanism, including welding torch, wire straightener and feeder, welding torch movement driving and transmitting devices;
    3. c) The 100kg capacity welding flux conveying and recovery machines;
    1. 2) In official FAT, one to several pieces of H Beam will be welded by Wuxi JACK and observed by customer, as test samples to validate and prove on quality and performance of our H-beam Welding Machine.

  • Q Could you give a brief introduction on Tandem Arc SAW in H-beam Welding Machine?

    A
    1. 1) Tandem arc SAW refers to that,
    1. a) Equipping 2 sets of SAW welding power source for welding on single piece of H-beam;
    2. b) The combination is one set of D.C. and one set of A.C. power source;
    3. c) Therefore, in one set of LHA or LHT model H-beam Gantry Welding Machine, which produces two pieces of H Beam simultaneously, one set of the machine should be equipped with 4 sets of SAW power sources (2 sets of D.C. and 2 sets of A.C.);
    1. 2) Market Prospect: Tandem arc SAW grows more and more popular over the past several years, to today year 2026. Because more and more large and heavy H Beams to be produced by customer;
    2. 3) Major advantages: Capable of high efficiently welding on large H-beam in high efficiency, with H-beam flange thickness up to 100mm;
    3. 4) The technique characteristic of Tandem Arc SAW:
    1. a) D.C. (Usually 1600A) produces deep fusion in welding seam;
    2. b) A.C. (Usually 1200A) produces broader welding face;
    3. c) It is especially suitable for being applied in 45° fillet SAW welding, which is the universal welding mode, being adopted in H-beam Submerged Arc Welding Machine;
    4. d) The SAW welding wire is usually Φ4.0mm solid type, 2 pieces for welding on one piece of H-beam;
    5. e) Welding velocity (And hence productivity) in H-beam Welding Machine is higher than single arc SAW.

  • Q Now that there are so many types of H Beam Flange Straightening Machine, how to select the most proper model, so that not only can meet requirement on flange straightening, but also with the least investment budget?

    A Proper selection on H Beam Straightening Machinery depends on below 2 critical factors:
    1. 1) The max. specification of H Beam flange for straightening;
    2. 2) Special specification of H Beam flange;
    This can be explained with 2 business communications between customer and Wuxi JACK in year 2026:
    1. 1) The max. straightening capacity:
    In August 2026, a South American customer asked Wuxi JACK engineer, whether our YTJ80 Hydraulic H Beam Straightening Machine can straighten on H Beam flange with 100mm thickness and 485MPa yield strength (Carbon steel: ASTM A709 WTB 1, Grade 50);
    This is Wuxi JACK engineer response on customer question:
    1. a) For H Beam straightening, because yield strength of customer H Beam is 485MPa, it is hard to straighten on 100mm thickness flange: This will press out obvious dent on surface of H Beam flange. The max. thickness of flange should not exceed 80mm under 485MPa yield strength;
    2. b) For straightening H Beam flange thickness 100mm, the yield strength should not exceed 345MPa;
    1. 2) The min. size of H Beam flange and web for straightening:
    In July 2026, a Bangladesh customer inquired Wuxi JACK on small model HYJ20 motor drive I H Beam Flange Straightening Machine. Size of their H Beam:
    1. a) Flange thickness: 5- 20mm;
    2. b) Flange width: 100- 300mm;
    3. c) Web height: 150- 500mm;
    This should be selected with HYJ20 model motor drive H Beam Straightening Machinery;
    We can also see that, in the field of H Beam Flange Straightening Machine, there is restriction on the minimum width of flange and minimum height of web. For example, for hydraulic drive YTJ80, the minimum width of H Beam flange is 500mm; For YTJ60, it is 350mm.

  • Q How to Manage on Straightening Stroke in Wuxi JACK Motor Drive and Hydraulic H Beam Straightening Machine?

    A
    1. 1) Wuxi JACK adopts on mature and the most cost effective way of downward acting stroke rulers, which are assembled alongside the 2 pieces of upper straightening rollers. This is also conventional design in industry, intuitive, simple and reliable;
    2. 2) Under customer requirement, we also use HMI (Human machine interface) and digital display, with proximity switch to be assembled on straightening rollers, to detect on downward straightening stroke. Of course, this will add on manufacturing cost of H Beam Flange Straightening Machine, and hence its selling price.

  • Q As Professional Supplier on H Beam Straightening Machinery, what is your observance on application trend of this machine in recent five to six years from year 2021 to 2026?

    A
    1. 1) 10 to 20 years ago, the mainstream product in the field of H Beam Flange Straightening Machine was motor drive HYJ800 and HYJ40 models, which have the max. straightening capacity of flange thickness 40mm, with yield strength of 235MPa;
    2. 2) Nowadays, more and more customers select on YTJ series Hydraulic H Beam Straightening Machine, especially those large models: YTJ60 and YTJ80. This is because Steel Structure industry has the trend of more complicated construction using heavier raw materials. And other industries, like Bridge construction industry customers, buy large and heavy H Beam Production Line for their project.

  • Q We know Customer sometimes purchase more than one set of H Beam Welding Machine and CNC Flame Cutting Machine, to meet their target on monthly and annually output on welding H Beam. How about quantity of H Beam Flange Straightening Machine in this regard?

    A
    1. 1) In process technology of welding H Beam production, H Beam flange straightening station is very seldom bottleneck on TAKT time of the entire line. Straightening speed is in the range of 6300mm/min. to 17,000mm/min.. Compared with 300- 2000mm/min. working speed of H Beam assembly and SAW welding, straightening velocity is rather high;
    2. 2) Therefore, one set of H Beam Straightening Machinery can meet customer demand on productivity, no matter it is a HYJ series motor drive type, or YTJ series hydraulic drive machine.

  • Q How to carry out trial run on Motor drive and Hydraulic H Beam Straightening Machine at Wuxi JACK workshop?

    A
    1. 1) What’s special with H Beam Flange Straightening Machine, compared with H Beam Assembly Machine and H Beam Welding Machine is, it can not be commissioned with workpiece loaded before delivery. Which means, it can only be tested in idle running: Try on vertical and horizontal movement of straightening rollers, and web alignment rollers;
    2. 2) This is because actual operation on H Beam flange straightening need to have main machine being installed and consolidated into its foundation, which has around 1,000mm depth into workshop floor. This can only be realized at customer facility;
    3. 3) In August 2026, Wuxi JACK had middle east customer engineers going to our company, for FAT (Factory Acceptance Test) on YTJ80, together with Z30 H Beam Assembly Machine and LHA H Beam Welding Machine. We explained this situation to customer engineers, and gained their understanding and agreement on having workpiece test on Z30 and LHA only.

  • Q What is the Max. Size of welding H Beam that can be produced with Wuxi JACK welding H Beam Production Line, by year 2026?

    A
    1. 1) One of the advantages of welding H Beam Production Line is its capable of producing heavy duty large welding H Beams, compared with 3 in 1 H Beam Fabrication Machine (Integral assembly, welding, straightening);
    2. 2) In year 2025 and 2026, Wuxi JACK has successfully delivered numerous automatic and semi-automatic large welding H Beam Production Line, for customers in Middle East (Energy industry) and South America (Bridge construction), which produces welding H Beam with the max size of:
    1. a) Web height: 3,000mm;
    2. b) Web thickness: 70mm;
    3. c) Flange width: 1,000mm; In end of August 2026, a South American customer asked Wuxi JACK engineer, for their planned manufactured welding H Beam of 2800mm web height, can flange width being made to 1200mm? --- Wuxi JACK H Beam Assembly Machine has certain allowance on H Beam assembly. For Z30 model, the actual Max. flange width that can be assembled is 1020mm, with 20mm margin. But 1200mm H Beam flange width is hard to be assembled at moment, confined with machine mechanical structure;
    4. d) Flange thickness: 80- 100mm, depending on yield strength of H Beam;
    5. e) H Beam yield strength: 235MPa, 345MPa, 485MPa

  • Q Can Wuxi JACK Welding H Beam Production Machine Works Normally and Stably under all types of Climates?

    A This is one of the frequently asked questions from customer to Wuxi JACK, during start up stage of communication. For example,
    1. 1) In June 2026, a middle east customer in their Technical and Commercial Clarification, one of questions is: Confirm Suitability for Continuous Operation Up to 50°C, dusty Saudi environment, and advise any tropicalization / cooling requirement;
    2. 2) In end of August 2026, a South American customer, in their list of questions on large welding H Beam Production Line (For producing H Beam of 2800mm web height), one of the questions is: The environmental conditions where we operate are hot and very humid, since we are located in a coastal city with high levels of salt in the air. Therefore, the machines you supply should be able to withstand these environmental conditions;
    Actually, customers of Wuxi JACK are from all over the world:
    1. 1) From cold countries of Russia, Ukraine, Belarus, to hot countries of Indonesia, Cambodia;
    2. 2) From arid regions of Middle East (Iraq, Saudi Arabia, U.A.E), to hot and humid regions of South America (Colombia, Argentina, Brazil, Chile...);
    Our machines can not only operate steadily in high standard under mild environment, but also under various “Extreme” climates. Design and production of our machines, including welding H Beam Production Line, fully considers these important factors, which matters to customers all over the world.

  • Q Which Points need to be considered by customer, which purchasing on welding H Beam Production Machine?

    A Experience comes from practice. Over the past 20 years, during our communication with customers, below are important and necessary points for consideration, for customer buying proper line of welding H Beam Production Machine:
    1. 1) The max. size of H Beam: This determines whether select welding H Beam Production Line, or individual equipment of 3 in 1 H Beam Assembly Welding Straightening Machine;
    2. 2) If should select welding H Beam Production Line, should it be automatic type, or semi-automatic type. This depends on customer preference and practical condition (For example, at customer city, which is more expensive: Human labor, or machine?) and budget level;
    3. 3) Customer Requirement on Productivity: On the basis of work arrangement at customer company:
    1. a) Single/ two/ three shifts;
    2. b) 5 or 6 working days each week;
    3. c) How many days of vacation each year;
    These determines quantity of machines in welding H Beam Production Line: If there is bottleneck at some stations, for example, H Beam welding, then additional set of machine should be installed, to catch up with target output of the entire production line;
    1. 4) Layout of Machines in welding H Beam Production Line:
    1. a) Under ideal conditions, customer has sufficient workshop land area, to accommodate on layout of machines proposed by Wuxi JACK engineers
    2. b) However, sometimes, there is restriction at customer workshop size, under such conditions, Wuxi JACK engineers need to make adjustment on line layout accordingly, to be suitable for customer practical condition;
    3. c) For example, in August year 2026, during a customer negotiating with Wuxi JACK on their planned to purchased large welding H Beam Production Line, the ideal size of workshop should be at least 100m length. However, currently customer only has production workshop of 48m length by 24m width. Under such condition, Wuxi JACK engineers should be flexible, to redesign layout of production line for customer.

  • Q Is Wuxi JACK necessary to dispatch technicians to customer site for installing and commissioning welding H Beam Production Line, or customer can finish the task by themselves?

    A This depends on customer practical condition and decision:
    1. 1) Under majority conditions, customers engineering team will install welding H Beam Production Machines by themselves, with remote technical support from Wuxi JACK (Email, instant messages: Wechat, WhatsApp...);
    2. 2) Sometimes, when customer asks Wuxi JACK to send technicians for machine start up, we will provide such technical service accordingly;
    Usually, for a typical welding H Beam Production Line:
    1. a) H Beam Assembly Machine, 1 set;
    2. b) H Beam Welding Machine, 1 set of LHA or LHT gantry frame for semi-automatic line, or 4 sets of LHC for automatic line;
    3. c) H Beam Straightening Machine, 1 set;
    4. d) 180° H Beam Overturning Equipment, 2 sets,
    Need 2 Wuxi JACK technicians, working 2 weeks at customer facility, to finish the tasks of: Machine installation, commissioning, hand over, training.

  • Q What are Advantages of Wuxi JACK Automatic Welding H Beam Production Line?

    A
    1. 1) Mature technology, safe and reliable operation, benefitting from over 20 years experience;
    2. 2) Highly automation of daily running, by means of automatic logistic equipment: 60°/ 90°/ 180° H Beam Overturning Equipment, H Beam travel cart, conveyors;
    3. 3) Over 90% line balance rate: Layout and quantity of H Beam Assembly Machine, H Beam Welding Machine and H Beam Straightening Machine fully considers customer requirement on output, and balance rate among all machines;
    4. 4) Shortest total throughput time: Process technology on H Beam assembly, welding, straightening fully considers fluent material flow, and removes bottleneck (welding) by means of installing 4 sets of LHC H Beam Welding Machine.
    5. 5) Low failure rate, and the best degree of OEE: Even if there is temporary shut down at certain station of welding H Beam Production Line due to unforeseen circumstances, the other stations will not be affected, and the entire line can be resumed to normal operation within the shortest time.

  • Q How Many Operators are Necessary as Working Team of Welding H Beam Production Line?

    A Ideal conditions:
    1. 1) CNC Strip Plate Cutting Machine: 1 Operator;
    2. 2) H Beam Assembly Machine: With automatic CO2 welding, 1 Operator; With manual CO2 welding, 2 Operators;
    3. 3) H Beam Welding Machine: For LHC in automatic line, 1 Operator on 1 set of LHC, totally 4 operators; 1- 2 operators on 1 set of LHA/ LHT;
    4. 4) H Beam Straightening Machine: 1 Operator;
    5. 5) Internal Logistics inside Production Line: 2- 4 Operators;
    Summing up, 10- 12 operators for working on automatic welding H Beam Production Line, 7- 8 operators for working on semi-automatic line.

  • Q Is Wuxi JACK Steel Structure BOX H Beam Longitudinal Straightening Machine a fully automatic machine? What are its operating tips?

    A
    1. 1) Like other Hydraulic Press Machines, this machine involves adjustment on pressing force tonnage, and distance between two force bearing points. These are crucial for making sure reliable length direction straightening effect;
    2. 2) For operators, after loading workpiece onto its infeed roller tables, and sending it to straightening worktable, he/ she should adjust on proper hydraulic force, based on thickness/ structure/ material/ size of workpiece. In this respect, we can not say that this BOX H Beam Lengthways Straightening Machine is a fully automatic machinery;
    3. 3) On the other hand, after setting up working pressure of hydraulic valves, which is usually around 16MPa, and interval between the 2 force bearing points on press beam, hydraulic system will automatically adjust on its output pressure, and hence straightening force, based on reactive force from workpiece. Operators do not need to fret over what precisely the output straightening force should be. Hydraulic system of our machine is very “smart”. In this respect, our BOX H Beam Longitudinal Horizontal Press Straightening Machine is a highly effective and user friendly automatic equipment.

  • Q How do Wuxi JACK engineers make sure safe operation of Steel Structure BOX H Beam Longitudinal Horizontal Press Straightening Machine?

    A
    1. 1) Interlock: Electric control system of machine has interlock between adjustment step and hydraulic valves, that during operators manipulating on distance between the two clamping points, and hydraulic pressure, oil cylinder of pressing head will not act. This eliminates potential risk of accidental injury on operator;
    2. 2) The “dangerous” part of machine: Straightening head, is painted in eye catching color;
    3. 3) The extend forward velocity of pressing head is first in fast speed, then in inching mode, thus not only of high efficient and precise performance, but also avoids accidental bump between moving pressing head onto operator hands, in case of operator negligence;
    4. 4) On the other hand, no machine can guarantee fully safe work, if operator does not pay any attention. For this Steel Structure BOX H Beam Longitudinal Straightening Machine, customer team should set up proper work instruction and safe regulation, and enforce it seriously.

  • Q What are Key Points to Note for Daily Operation and Service on Steel Structure BOX H Beam Lengthways Straightening Machine?

    A
    1. 1) The careful maintenance on hydraulic system, guided with well managed TPM (Total Preventive Maintenance Plan);
    2. 2) The regular and well managed replacement plan on hydraulic oil and mechanic lubricating oil;
    3. 3) The Contamination Control of on site work environment, especially oils and moving parts (Straightening head and its drive oil cylinder);
    For these critical points of attention, we (Wuxi JACK) as producer of this BOX H Beam Longitudinal Horizontal Press Straightening Machine, give detailed suggestion in machine manual book.

  • Q How Long is Service Life of Wuxi JACK Steel Structure BOX H Beam Longitudinal Straightening Machine? Are there any Consumables needed?

    A
    1. 1) Although delivering heavy straightening force up to 300 ton, structure of this machine is relatively simple and easy to grasp, for customer mechanics. Besides, its operation is also concise, but involve proficient skill;
    2. 2) The expected high standard, controllable and stable performance of our BOX H Beam Lengthways Straightening Machine can be at least 10 -15 years, under the precondition of proper operation and maintenance;
    3. 3) There are no any consumables necessary for machine daily operation. Its running cost is rather low: Only electricity and oil.

  • Q Under What Conditions, will Wuxi JACK Engineer Recommend Advanced Functions Groups, to Customers of Steel Plate Groove Edge Milling Machine?

    A
    1. 1) For Edge Milling Angle: If customer need high precision control on finished bevel angle, such as, to two decimal places, which could only be attained from advance technique, instead of traditional way of manual turning milling head. We will suggest HMI (Human machine interface) to customer. It has series of “High end” function unit: Ammeter, proximity switch... to fully guarantee easy acquiring on accurate beveling angle;
    2. 2) For Milling Head Selection: Every time we submit quotation on different models Steel Plate Edge Milling Machine to customer, we give 2 optional proposals for customer choice: Equipped with conventional HD750 head, and equipped with E-LONG MU6S head. We list quotations/ technical characteristics under configurations of 2 types milling head, which is easy for customer to make decision;
    3. 3) For Steel Plate Loading: This is another optional unit we recommend to customer, for every proposal of Edges Milling Machine. We list advantages and values/ photos/ additional charges on this Wuxi JACK exclusively owned hydraulic drive automatic steel plate loading roller tables. Customer can make choice accordingly.

  • Q How to Make Adjustment on Finished Bevel Angle with Wuxi JACK Steel Plate Edge Milling Machine?

    A There are 3 types of configurations for customer choice:
    1. 1) Conventional Way of Manual Turn and Visual Check: Operator turn milling head to expected edge milling angle, and check against stainless steel angular ruler, which is installed alongside milling head. This operation entails operator skill, experience and full concentration in the process, and bevel angle accuracy can only be limited to whole degrees, for example, 45°;
    2. 2) Labor Saving Motor Drive Turn and Visual Check: The 2nd option is to install an A.C. motor to milling head, for driving its tilt. Operator pushes on buttons, and milling head swing accordingly. In the process, the operator still needs to check against angular ruler all the while, and bevel angle accuracy is at the same level as the 1st manual operating type. Of course, this is still a technological progress on Edges Milling Machine;
    3. 3) Labor Saving Motor Drive Turn and HMI Control: The 3rd option, which is state-of-art technology currently by July 2026, is milling head turning is driven with A.C. motor, while expected bevel angle is keyed in by operator ahead of time, through function key of HMI. This is the easiest and most accurate way on edge milling management, also intuitive, because tilting angle of milling head is always displayed onto HMI screen, together with Ammeter screen on milling head. And you can acquire ideal bevel angle to decimal point, such as 36.66° without any effort. Of course, such advanced function will bring up price of the Steel Plate Groove Edge Milling Machine. It is up to customer decision whether they will select this function group or not.

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