Method for controlling depth of sliding block of upper die of bending machine

A control method and bending machine technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of inaccurate bending, expensive imported equipment, etc., to save money, high accuracy, The effect of accurate calculation results

Inactive Publication Date: 2014-05-07
SOUTHEAST UNIV
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  • Claims
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Problems solved by technology

[0003] Technical problem to be solved: Aiming at the deficiencies of the existing technology, the present invention proposes a method for adjusting the depth of the upper mold of the bending machine, which s

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  • Method for controlling depth of sliding block of upper die of bending machine
  • Method for controlling depth of sliding block of upper die of bending machine
  • Method for controlling depth of sliding block of upper die of bending machine

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] First obtain the relevant parameters of the bending sheet 2 and the mold as follows: the thickness of the bending sheet 2 is t=1.4mm, the material is Q235, the elastic modulus E=200000MPa, and the strength limit σ b =450MPa, the nominal opening of the lower mold of the bending mold V=12mm, the V-shaped angle of the V-shaped groove β=86°, the fillet radius r at the V-shaped groove of the lower mold 3 1 =1mm. Since V / t=8.6, 6t≤V≤12t is satisfied, so the method of the present invention can be used.

[0040] Set the target bending angle α 1 =102°.

[0041] On a CNC bending machine, there are generally control units, motors, hydraulic systems, upper die slider 1 and lower die 3, in which the control unit sends motor signals to drive the motor, and the motor controls the upper die slider through the hydraulic system 1 moves up and down, and a position measuring se...

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Abstract

The invention discloses a method for controlling the depth of a sliding block of an upper die of a bending machine. When the method is used, only the thickness t of a plate to be bent, elasticity modulus E, ultimate strength sigma b, a nominal opening V of a lower die, the V-shaped angle beta of a V-shaped groove of the lower die and the radius r1 of a fillet at an opening of the V-shaped groove of the lower die need to be given, and then the value of the depth h of the upper die corresponding to the bending angle alpha1 which is expected to be obtained after random resilience can be calculated directly through a formula; next, the sliding block of the upper die is pressed downwards to the position, at the depth h, of the upper die, and the bent plate is taken out. When bending is conducted according to the method, the error between the finally obtained bending angle and a target bending angle is quite small. The method is simple, effective, high in accuracy, independent of experience of workers, and broad in prospect of large-range industrial application. As a result, there is no need to rely on overseas imported equipment any more, and a large amount of capital is saved.

Description

technical field [0001] The invention relates to the field of calculation and control of process parameters of a bending machine, in particular to a method for adjusting and controlling the depth of an upper die of a bending machine, which considers the influence of springback when bending a sheet material. Background technique [0002] The sheet material can be bent into a certain angle after being freely bent by the V-shaped bending die on the bending machine. The upper die of the bending die is fixed on the slider of the bending machine. The distance that the upper die presses into the lower die is defined as the depth of the upper die, referred to as the depth. By controlling the depth value, the sheet can be bent into different angles. After the mold is relaxed, the sheet will rebound due to the effect of material elasticity. The angle after the rebound is the final bending angle. This bending angle is larger than the bending angle when the mold is pressed into a certain...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 汤文成郭哲锋
Owner SOUTHEAST UNIV
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