The Cambering Machine and Stretch Forming Machine belong to the same type of cold bending processing equipment/profile bending machine, utilizing full hydraulic control for easy operation and high production efficiency. It can cold bend large I-beams, round pipes, square tubing, and other profiles with a section below 1000mm. The resulting curves are perfect, with high precision, good stability, and no deformation.

The Cambering Machine is mainly used in various industries, including architectural curved steel structures, tunnel support, subway engineering, ceilings, production line tracks, etc. The bending angle of the Cambering Machine is generally not greater than 180°, i.e., half a circle. Typically, the bending allowance of the Cambering Machine is the effective arc length of the profile plus 400mm.

Principle

Cold cambering, also known as point bending or gag bending, cold cambering is a bending method that uses hydraulic rams to simultaneously apply forces at discrete locations along the member to produce large-radii bends. Place the steel beam horizontally on the side of the cambering mold, use a powerful hydraulic cylinder to apply pressure from the discrete locations, and the steel beam forms the required cambering. This is the most common method for cambering beams to offset a portion of the service-load deflections; therefore, the hydraulic rams are located approximately at one-third points to produce a curved shape approximating a typical beam deflection curve.

Cold cambering is also known as gag pressing or point bending. The steel beam is placed horizontally on the side of the arc-shaped mold, and the hydraulic system controls the forward and backward movement of the cylinder to apply pressure from both sides of the steel beam to form the steel beam into the desired arc shape. By adjusting the curvature of the template to control the curvature of the bent workpiece, it is especially suitable for bending large curvatures in building arc-shaped steel structures, tunnel supports, roof curved beams, subway engineering, curtain walls, ceilings, production line tracks, and other industries.

When cold cambering the workpiece, first adjust the workpiece to the center position of the bending cylinder for bending on both sides. After adjustment, first clamp the workpiece for the top bending operation.
When the workpiece is bent, the segmented moving top bending method is adopted. If necessary, special auxiliary fixtures are used to achieve the top bending effect.

See also  PBH Section Bending Machine – The best solution for steel structure profiles

Features

• Ensures the precise outward angle required for the work.
• Easy to operate.
• Compatible with wide flanges, channel steel, and tubular sections.
• Convenient and independent.
• Accurate and time-saving.

Operating Instructions

• Power On and Startup: Connect the power and start the machine. Check if the hydraulic station motor is rotating in the correct direction. If the motor is in reverse, immediately shut off the power as prolonged reverse rotation can damage the pump. Also, check if all operations are functioning properly.
• Workpiece Adjustment: Before bending the workpiece, adjust it to the center position of the cylinder. If shims are needed, ensure they are solid and secure to prevent slipping during clamping, which can cause injury. Once adjusted, clamp the workpiece before bending.
• Bending Operation: Bending the workpiece must be done in segmented movements. Special auxiliary fixtures may be necessary to achieve the desired bending effect. Additional filler material may be required to meet the workpiece requirements. The degree of bending should be determined based on operational experience, initially by placing a curvature template against the equipment template and adjusting to the optimal position.

Service and Commitment

• The product warranty period is one year, during which free on-site repairs will be provided (excluding faults or damage caused by human factors or irresistible natural phenomena).
• Where applicable laws and regulations in China have specific provisions, the company will comply with relevant laws and regulations.

Paid repair services will be implemented for the following situations during the warranty period:

• Damage caused by human factors or irresistible natural phenomena.
• Malfunctions or damage caused by improper operation.
• Malfunctions or damage caused by modification, disassembly, or assembly of the product.

Installation and Commissioning

• Within 5-10 days of the contract taking effect, the supplier will provide equipment foundation drawings. The buyer is responsible for equipment foundation construction (including grounding) and secondary grouting, as well as bringing the equipment power into the electrical control cabinet.
• The installation and commissioning of the equipment will be the responsibility of the supplier, with the buyer providing lifting assistance and personnel cooperation. The supplier must have the commissioning personnel on-site within 5 days of notification by the buyer and complete the equipment commissioning within 1 to 5 days (except for large equipment assembly and export on-site).
• The necessary tools for equipment installation and commissioning must be provided by the buyer, including general tools and equipment lifting tools. The buyer is also responsible for providing lubricating oil and hydraulic oil for machine tool commissioning. The buyer is responsible for the fabrication and installation of the surrounding platforms of the machine.

Technical Documentation

• Equipment user manual, equipment hydraulic schematic diagram, lubrication diagram, and lubrication instructions, electrical schematic diagram, and equipment installation layout foundation diagram will be provided.
• Provide certificates of conformity for purchased parts, hydraulic components, and subcontracted parts. Detailed parameters and proofs of materials and heat treatment for the machine will also be provided.
• The equipment will be available for lifelong supply of spare parts as per user’s requirements. Free technical training will be provided. The company will train the buyer’s mechanical, hydraulic, and electrical operators to familiarize them with the equipment’s performance and operation. Lifelong service will be implemented, and spare parts will be offered at preferential prices.

Cambering Machine vs Section Bending Machine

The difference is the bending principle: Rolling beams and Cold cambering beams (also known as point bending or gag bending)

See also  PBH Section Bending Machine – The best solution for steel structure profiles

• Accurate regarding bending done by cambering machines, equipment incorporating one or two hydraulic rams to press the steel sections at discrete locations/various points to induce a camber.
• Regarding beam bending/rolling done by section benders, also named angle rolls or I beam bending machines.  The profile bending machines typically incorporate three or four rolls to induce a camber or curve a structural steel section beyond a camber.

Summary

The cambering machine utilizes a hydraulic system to control the forward and backward movement of large profiles, pipes, and various types of profiles, thereby bending them into shape. The curvature of the workpiece is controlled by adjusting the curvature of the template, making it particularly suitable for architectural curved steel structures, tunnel supports, roof beams, subway engineering, curtain walls, ceilings, production line tracks, various oversized profiles, and large-radius bending shapes in multiple industries. The unique hydraulic control station provides thrust to the hydraulic cylinders during the bending process, shaping the workpiece using a pre-adjusted curvature template. Dual cylinders serve as clamping devices for the workpiece, adjusting the curvature by moving the cylinders back and forth.