Yawei AHYW Large CNC Pressbrake Bending Poles China Factory Supplier

Large CNC Pres brake  bending machines in the electric power pole bending/forming industry
1. Introduction
As an essential component of power transmission and urban lighting systems, the quality of electric utility poles directly impacts the stability of power supply and the safety of urban lighting. Bending forming is the core process in the manufacturing of electric utility poles, and its technological level determines the precision, strength, and appearance quality of the poles. With the rapid development of power infrastructure construction, the demand for electric utility poles continues to grow, and higher requirements are placed on their quality and production efficiency. Large bending machines, with their characteristics of high precision, high stability, and high efficiency, have gradually become key equipment in the electric utility pole forming industry. This report will delve into the application of large bending machines in the electric utility pole forming industry, analyze the considerations in pole bending forming, the key points of mold selection and design, and the method for selecting the tonnage of bending machines, providing a reference for relevant enterprises.
II. Application status of large bending machines in the electric power pole forming industry
(1) Industry demand drives equipment upgrades
In recent years, China has continuously promoted the construction of electric power infrastructure, with ongoing projects such as rural power grid renovation and urban power grid upgrades. Consequently, the market demand for electric power poles has shown a rapid growth trend. Simultaneously, as the quality requirements for electric power poles have increased, traditional bending equipment has become inadequate to meet the production needs for high precision and efficiency. Large-scale bending machines, equipped with powerful bending capabilities, precise control systems, and stable performance, can achieve one-time forming of electric power poles, effectively enhancing production efficiency and product quality. Therefore, they have been widely adopted in the industry.
(II) Analysis of typical application cases
AHYW Yawei china factory achieved remarkable application results in the electric power pole forming industry with its large-scale bending machines. AHYW China factory designed and produced 1000T, 1600T, 2000T, 6M, 8M&12M Large CNC Press brake bending machines used in sheet metal bending forming poles industry,  the production cycle of a single lamp pole was shortened from the original 45 minutes to 18 minutes, and the production efficiency was increased by 60%. At the same time, the bending machine adopts an advanced numerical control system, which controls the straightness error of the lamp pole within ±1mm, and the product yield rate is increased to 99.2%, greatly reducing production costs and quality risks. In addition, the bending machine has good adaptability and can meet the bending needs of electric power poles of different specifications and materials, providing strong support for the diversified production of the enterprise.
III. Precautions in the bending and forming of electric light poles
(I) Preparations before bending
Sheet metal cleaning and inspection: Before bending, it is essential to thoroughly remove impurities such as cutting slag and oil stains from the surface of the sheet metal to avoid damaging the mold or affecting the surface quality of the lamp pole during the bending process. At the same time, the length, width, and straightness of the sheet metal must be carefully inspected to ensure that it meets production requirements. For sheet metal with a non-straightness exceeding 1/1000, correction should be carried out. Especially for polygonal lamp poles, the straightness of the sheet metal must be ensured, otherwise it will seriously affect the bending accuracy.
Equipment debugging and parameter setting: Based on the specifications and material of the lamp post, adjust the bending depth, pressure, and other parameters of the bending machine appropriately. Before the official bending process, conduct a trial bending to check whether the bending angle and dimensions meet the requirements. Based on the results of the trial bending, make minor adjustments to the parameters to ensure the stability and accuracy of the production process.
(II) Key points of operation during the bending process
Line marking and alignment accuracy control: When marking lines on the sheet metal, the error should be controlled within ±1mm to ensure the accuracy of the bending position. During the bending process, it is necessary to ensure the alignment accuracy between the sheet metal and the mold, so as to minimize the pipe seam, and at the same time, the height difference between the two edges should not exceed 5mm to ensure the roundness and appearance quality of the lamp post.
Sheet material clamping and anti-offset measures: Before bending begins, the sheet material must be firmly clamped to prevent it from offsetting during the forming process, which could lead to inaccurate bending dimensions. For longer sheet materials, multi-point clamping or auxiliary positioning devices can be used to ensure the stability of the sheet material.
Real-time quality monitoring: During the bending process, it is essential to monitor the forming quality of the lamp post in real-time, promptly identifying and addressing any issues that arise. If quality issues such as deviations in bending angles, surface irregularities, or other defects are discovered, the operation should be immediately stopped, and equipment parameters adjusted or molds replaced to prevent the production of a large number of non-conforming products.
(III) Quality inspection and handling after bending
Dimensional and accuracy inspection: After bending is completed, strict inspection must be conducted on the dimensions of the lamp post, including diameter, length, straightness, and angle, to ensure they meet the design requirements. For lamp posts that fail to meet the accuracy requirements, rework should be carried out until they meet the standards.
Surface quality inspection and repair: Inspect the surface of the lamp post for defects such as bumps and scratches. For minor defects, methods such as grinding and polishing can be used for repair; for serious defects, the lamp post should be scrapped to avoid affecting its service life and appearance.
IV. Selection and Design of Bending Molds for Electric Light Poles
(I) Basic principles of mold selection
Specification and material of adaptable lamp poles: Select appropriate molds based on parameters such as the diameter, wall thickness, and material of the electric lamp poles. For lamp poles of different specifications, corresponding molds should be equipped to ensure bending accuracy and forming quality. At the same time, the material and hardness of the molds should be considered to ensure that they can withstand the huge pressure during the bending process, avoiding premature wear or damage to the molds.
Meeting production efficiency and cost requirements: When selecting molds, it is necessary to comprehensively consider both production efficiency and cost factors. Efficient molds can reduce mold change time and improve production efficiency, but their cost is relatively high; while ordinary molds may have lower costs, they may affect production efficiency. Enterprises should choose the mold with the highest cost-effectiveness based on their own production scale and needs.
(II) Key points of mold design
Mold structure design: The mold structure should be simple and reasonable, facilitating operation and maintenance. For conical lamp posts, a dedicated conical bending mold should be designed to achieve precise bending with a taper of 1° - 10°. The upper and lower molds of the mold should be tightly fitted to avoid excessive or insufficient clearance, ensuring the accuracy of the bending angle.
Mold Precision and Surface Quality: The precision of the mold directly impacts the bending accuracy of the lamp post, hence the processing accuracy of the mold should be maintained at a high level. Simultaneously, the surface of the mold should be smooth and flat to prevent scratching the surface of the lamp post during the bending process. Techniques such as polishing and quenching can be employed to enhance the surface quality and hardness of the mold.
Wear resistance and durability of molds: During the bending process, molds are subjected to significant friction and pressure, necessitating good wear resistance and durability. High-strength and high-hardness mold materials can be selected, and appropriate heat treatment can be applied to enhance the service life of the molds.
(III) Maintenance and care of molds
Regular cleaning and lubrication: During use, molds accumulate a large amount of impurities such as iron chips and oil stains. Regular cleaning is necessary to prevent these impurities from affecting the precision and service life of the mold. Additionally, lubrication should be applied to the moving parts of the mold to reduce wear and tear.
Regular inspection and repair: Regularly inspect the wear condition of the mold. If cracks, deformation, or other issues are found, repair or replace it promptly. For minor wear, repair methods such as welding repair and grinding can be used; for severe damage, the mold should be replaced immediately to avoid affecting production quality.
V. Selection of tonnage for electric light pole bending machine
(I) Factors affecting the tonnage of bending machines
Thickness and Material of Lamp Pole Plate: The tonnage of the bending machine primarily depends on the thickness and material of the lamp pole plate. According to the principles of material mechanics, in air bending, doubling the plate thickness theoretically increases the required tonnage to four times. Plates of different materials exhibit varying strengths and hardnesses, necessitating different bending tonnages. For instance, stainless steel plates have higher strength than carbon steel plates, thus requiring a greater tonnage during bending.
Length of lamp pole and bending method: The longer the lamp pole, the greater the tonnage required for bending. Furthermore, different bending methods have varying tonnage requirements. For instance, employing a dual-machine linkage bending method can effectively reduce the tonnage demand for a single bending machine, but it demands high synchronization accuracy between the two machines.
(II) Calculation method for tonnage of bending machine
The tonnage of a bending machine can be calculated using the following formula: [ P = \frac{650 \times S^2 \times L}{V} ] where (P) represents the tonnage of the bending machine (in kN), (S) denotes the thickness of the sheet material (in mm), (L) signifies the bending length (in m), and (V) indicates the opening width of the lower die (in mm). In practical calculations, adjustments should be made based on the material of the sheet material. For instance, for stainless steel sheets, the calculation result can be multiplied by a coefficient of 1.5 to 2.
(III) Practical suggestions for tonnage selection
Leave a certain tonnage margin: To ensure the stability and reliability of the bending machine during long-term use, a certain margin should be left when selecting the tonnage of the bending machine. Generally speaking, the calculated tonnage can be multiplied by a coefficient of 1.2 - 1.5 to avoid insufficient tonnage due to factors such as sheet thickness tolerance and material strength fluctuation.
Considering the enterprise's development needs: When selecting the tonnage of a bending machine, enterprises should also consider their future development needs. If the enterprise plans to expand its production scale or produce larger-sized lamp posts, it should choose a bending machine with a larger tonnage to meet future production demands.
VI. Conclusion
The application of large-scale bending machines in the electric power lamp pole forming industry has effectively improved production efficiency and product quality, driving the development of the industry. During the bending and forming process of lamp poles, enterprises should strictly adhere to various precautions to ensure bending accuracy and product quality. At the same time, it is necessary to reasonably select and design molds, and choose the appropriate tonnage of bending machines according to the specifications and materials of the lamp poles.AHYW Yawei china factory demonstrate that advanced equipment, scientific processes, and strict management are key to improving the production quality and efficiency of electric power lamp poles. In the future, with the continuous advancement of electric power infrastructure construction, the application prospects of large-scale bending machines in the electric power lamp pole forming industry will be even broader. Enterprises should continuously strengthen technological innovation and management optimization to adapt to the development needs of the industry.