China's steel drum products are mainly 200L closed steel drums, and the welding production of steel drums has always been based on general-purpose semi-automatic seam welding machines, as well as combination equipment used by some enterprises for combined transformation and semi-automatic seam welding machines. Primary automatic seam welding machine. However, compared with the current state-of-the-art fully automatic seam welding machines in the international field, it is far from meeting the needs of the domestic and international markets, and it cannot meet the needs of the rapidly developing steel drum market. At present, the fact that China's accession to the WTO and China's international processing industry market has greatly increased the demand for steel barrels in terms of quantity, type, quality, and form. The current steel barrel production methods have failed to meet this demand for quantity and quality.
High speed steel bucket automatic seam welder. This equipment is an important equipment for the high-speed production of metal barrels. It is a composite automatic welding equipment that integrates feeding, feeding, reeling, welding, rolling welding, shearing and unloading. Control adopts high-interference-resistant PLC programmable controller and modular circuit. The welding power source adopts DC welding power source with constant voltage/constant current function and programming control technology to ensure the welding current in different areas of the workpiece and the fluctuation of individual external factors. Impact on welding quality.
The rated power of this equipment is 3-phase 150KVA, 380V three-phase input, secondary rectified DC output, saves about 30% of power compared with other AC power sources, and does not cause disturbance to the power grid during welding and the three-phase power is not affected. Balance effect. The welding speed is up to 16 meters per minute and the highest productivity is 720 pieces per hour at high production levels. The maximum welding range is an international standard steel drum with a diameter of 571.5mm. The length can be from 470mm to 1100mm. The thickness can be directly observed in the international thin-plate trend. Welding can be performed from 0.5 to 1.5mm, so that the production can not only save material and cost. Can also meet the needs of the international market. The drum material can be carbon steel, alloy steel and non-ferrous metal.
The FNT-3×150 high-speed drum automatic seam welder's reel and longitudinal weld seams are completed in a single unit, eliminating the need for spot weld spotting and improving production efficiency. Welding speed, welding current, electrode pressure and other parameters are easy to adjust, and the amount of overhang can be stable*. The welds are rolled in two passes to further improve the quality and the workpiece surface is smooth and beautiful. The electrode wheel can be trimmed without removing the electrode wheel, which improves the maintenance efficiency. The control system adopts man-machine interface, touch-type control, full Chinese operation, direct display of fault status, and convenient maintenance.
The specific process is as follows:
Feeding: The material to be processed is introduced into the blanking device, cut according to the required material width, and then fed into the feeding device to wait for the propulsion circle.
Reel: The automatic feeding device automatically pushes the cut steel drum stock into the drum assembly integrated with the whole machine according to the working conditions of the next process, and the cut steel plate is rolled into a barrel of a corresponding diameter as needed. shape.
Transportation: The drum body is transported to the welding position by frequency conversion motor, chain transmission device, etc., and then the barrel body is advanced to the welding wheel inlet according to the welding station condition.
Positioning welding: The welding station is composed of three groups of shaping wheels and upper and lower welding wheels. According to the adjusted special heat control program, automatic adjustment is made to the slow rise, impedance change, slow drop, and network pressure change to ensure the welding quality. Edge width is only 3 to 4 mm. The welding wheel can be automatically displaced laterally, which greatly extends the service life of the welding wheel.
Rolling and Shaping: During the working process, after the bucket body leaves the welding wheel, it enters into the rolling wheel that runs synchronously with the welding wheel. At this time, the weld of the barrel body is still in the red hot state, under the rolling of a certain pressure, Its internal structure becomes more compact, reducing the step of weld seaming, reducing the overlap thickness at the overlap, and forming a smooth and beautiful plane weld.
Shear tongue joints: The joints that have been rolled and extruded at the welded joints are cut off to facilitate the work of the next process.
Shape and structure as shown
The device operating system is divided into three major operating modes: automatic cycle operation; stepping operation; segmentation operation.
two. Features
1. High speed: high degree of automation, high productivity, and strong continuity, can weld up to 720 pieces per hour. Because this equipment is actually a roll, weld joint automatic high-speed seam welding equipment, the time required for each step can be overlapped (seven steps overlapping), and an operator can complete the operation of the entire equipment. And monitoring, compared to the current domestic steel tank seam welder, so called "high degree of automation, high productivity, strong continuity."
2. The welding range is wide: the metal barrels of carbon steel and alloy steel with a length of 480 to 1100 mm, a maximum diameter of 571.5 mm, a thickness of 0.5 to 1.5 mm are used as the base metal, and 200L to 208L steel barrels are preferred.
3. High degree of automation: It can completely eliminate the previous processes such as polishing, circle rounding, lap welding before seam welding required by the semi-automatic seam welding machine, and the subsequent process of edging and grinding after seam welding to achieve the pass through the steel drum. Fully automatic seam welding machine completes high-speed, one-time, efficient work. Productivity up to 5 seconds.
4. Easy to operate: The control of the electronic control system adopts PLC programming controller and man-machine interface, all Chinese man-machine dialogue. Welding quality is stable, electrode pressure, welding current, welding speed and other parameters are easily adjusted, and the amount of overhang is stable.
5. Can be beautiful: the weld passes two rollers, further improving the welding quality, and the appearance of the workpiece surface is smooth and beautiful.
6. Work stability: FNT-3×150 type high-speed steel drum automatic seam welding machine is used for production. Because constant current controls welding current, it can eliminate the influence of external factors on welding quality due to loop resistance, power grid fluctuation, etc., and can guarantee 0.5mm international popular thin steel drum welding and domestic 1.5mm steel drum welding, there is a larger adjustment range, welding more stable.
7. Energy Saving: The welding power source adopts a three-phase secondary rectifier welding power source, which has less reactive power loss, the power factor of the welding circuit is as high as 95%, and the power grid load is balanced. There is no large line current caused by the AC welding power source, and the network voltage fluctuates greatly. Impact, improving the power environment of other equipment. In the welding process, it is not necessary to consider the influence of the current and magnetic field caused by the influence of the metal barrel body on the impedance, so that the welding machine can obtain a more stable current, heat, and magnetic field. Due to the DC output of the welding power source, the impact on the power grid is reduced, the welding energy is concentrated, the input power is reduced, and energy is saved.
8. Material saving: The FNT-3x150 high-speed steel barrel seam welder adopts a new lap welding process with only 3-4mm lap, which reduces the amount of material used compared to the original lap width of 10mm, saves cost and reduces The influence of the force of the weld reduces the amount of processing in subsequent processes.
three. Promotion
At present, FNT-3×150 high-speed steel barrel seam welding machines have been manufactured in China. In the course of users' use, the products produced have reached or exceeded the requirements of the products produced by imported equipment, and can gradually replace domestic and foreign workers. Frequency AC automatic and semi-automatic drum seam welder. Obtaining good economic and technological benefits in actual production (1) Improving welding quality, the failure rate of steel drums has dropped from the original 4% to less than 2%, which has greatly improved the quality of welds and solved the problem of weld leakage. .
(2) Energy conservation: The original domestic welding machine required 3 sets of FN150-5 welders and 2 sets of 75KVA spot welders. A 5KVA rolling machine with a total capacity of 605KVA. The amount of work done with six machines can be accomplished with only one FNT-3x150 high-speed steel barrel seam welder.
(3) Adopt new technology to improve production level and reduce labor intensity. Automatic welding machine set reel, spot welding positioning, longitudinal seam three processes completed in a machine, shortened the process flow, high degree of automation, reduce labor intensity, Reduced operators.
As for the production of tens of millions of steel barrels per year in China, and the increasing international demand promoted by international trade, the steel drum packaging industry continues to be in line with international standards in terms of product structure and technology, FNT-3×150 high-speed steel barrel seam welding machine. It has been able to meet the demand for changes in the thickness of steel drums, and will continue to meet the demand for steel drum production in other areas.
Together with the steel drum manufacturing industry, we will realize the development from small-scale production to large-scale grouping and base development, the development of small varieties to international multi-species, and the improvement and achievement of higher steel drum industry levels.
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