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Edge pressing force and punching speed changeable method for forming sheets and device thereof

A technology of stamping speed and variable blank holder force, which is applied in the direction of applying stable tension/pressure to test the strength of materials, etc. It can solve the problems of less states and large differences in the nominal force of sliders, etc., and achieve the effect of improving deep drawing performance

Inactive Publication Date: 2004-12-22
JIANGSU UNIV
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Problems solved by technology

One of the shortcomings of this system is that the nominal force of the slider of the press is only 1000KN, which is quite different from the nominal force of the slider required for the stamping and forming of the actual automobile fender; The popular use of single-action presses does not match; the third deficiency is that the blank holder force control curve is only two horizontal straight lines, and the state is less

Method used

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  • Edge pressing force and punching speed changeable method for forming sheets and device thereof
  • Edge pressing force and punching speed changeable method for forming sheets and device thereof
  • Edge pressing force and punching speed changeable method for forming sheets and device thereof

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Embodiment Construction

[0026] The following is combined with the attached figure 1 with figure 2 Describe the details of the two ways of variable blank-holding force and variable stamping speed proposed by the present invention to meet the needs of complex drawing parts forming process.

[0027] Such as figure 1As shown, the mold is installed on a single-action thin-plate hydraulic testing machine, and is composed of a die 1, a punch 3, a blank holder 4, a guide plate 5, and a backing plate 6 of the lower die. Among them, the die 1 is installed on the upper slider 13 of the hydraulic press, and its movement is determined by the main cylinder 12; the punch 3, the blank holder 4, the guide plate 5, and the backing plate 6 of the lower die are installed on the workbench 7 of the hydraulic press; the ejection cylinder 11 Push the hydraulic pad 9, and the hydraulic pad 9 pushes the special combined ejector rod 8, and the ejector rod 8 pushes the blank holder 4 to generate blank holder force.

[0028]...

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Abstract

The invention is a single-acting sheet hydraulic test machine of variable border pressing force and press speed. It uses the displacement of the top slide block as the independent variable, according to the present working curve, uses the pressure and speed sensor to real-timely sample the pressure and speed data provide for the PLC to make close-loop control, which realize the continual variation of the border-pressing force within 150KN-1250KN and the adjustment of the press speed within 4-20 mm / s.

Description

Technical field [0001] The invention relates to the field of mechanical forming processing, in particular to a thin plate forming method and device with variable blank holder force and variable stamping speed for forming complex drawn parts, mainly used for stamping and forming complex deep drawing by applying thin plate materials such as steel plates and aluminum plates In the case of parts, it can also be used for forming tests on small-scale simulated parts of body panels. This device can well realize the change of blank holder force and the change of punching speed of the upper slider in the forming process of complex deep-drawing parts, so as to control the direction and size of sheet material flow and the strain rate of thin plate, and finally obtain a product that meets the requirements of forming quality (cracking, Wrinkles, springback, insufficient rigidity and other defects are controlled within the error range) complex deep drawing parts. Background technique [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/10G01N3/12
Inventor 陈炜杨继昌仲志刚姜银方
Owner JIANGSU UNIV
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