How to Choose Numerical Values For Bending Machine Deflection Compensation

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During the processing of the bending machine, due to the weight of the worktable and slider itself, it will produce certain deflection deformation, which directly affects the quality and accuracy of the bent parts. Therefore, choosing the appropriate deflection compensation value is crucial for improving its machining accuracy.

1. Mechanical compensation

Mechanical compensation is mainly achieved by installing wedge blocks under the workbench. The position and size of each wedge block are designed based on the finite element analysis results of the slider and worktable. By automatically controlling the relative movement of the wedge block, the deflection deformation caused by the slider and the bending machine worktable standing plate is effectively compensated.

2. Hydraulic compensation

Hydraulic compensation is achieved by applying additional force through a small hydraulic cylinder beneath the workbench. This method is easy to operate, does not require high demands on workers, and the compensation amount can be finely set through the CNC system.

Method for selecting deflection compensation values:

When choosing a bending machine, the appropriate compensation mode should be selected based on the required bending accuracy. Mechanical compensation is suitable for mass production with high precision requirements, while hydraulic compensation is more suitable for situations where operation is simple and precision requirements are not particularly high. When selecting deflection compensation values, the softness, hardness, and thickness of the material should also be considered. Generally speaking, the harder the material, the greater the compensation required. For example, the bending coefficient of stainless steel is 0.92, Q235 is 0.84, and manganese steel is 0.968.

The deformation of the bending machine slider and worktable can be obtained through finite element analysis, which can better set the deflection compensation value. This method not only improves the accuracy of its compensation, but also reduces machining errors caused by improper compensation. In order to further improve machining efficiency and quality, a dynamic deflection compensation system can be used. This system can dynamically adjust the compensation value according to the magnitude of the bending force, thus better adapting to different processing requirements.

When adjusting the deflection compensation value, a small-scale test should be conducted first to ensure that the compensation effect of the bending machine meets expectations. Regular inspection and maintenance of the compensation device should be carried out to maintain its good working condition. Adjust the compensation value according to the actual processing situation in a timely manner to adapt to different processing needs.

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