Deep drawing die based on variable blank holder force control

A technology of deep drawing die and variable blank holder force, applied in the field of stamping die, can solve problems such as tearing and breaking of the sheet to be stamped, scrap parts, etc., so as to improve the accuracy and quality, improve the stamping accuracy and stability, and prevent the blank holder from breaking. Effect

Inactive Publication Date: 2020-09-04
ANHUI TECHN COLLEGE OF MECHANICAL & ELECTRICAL ENG
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  • Description
  • Claims
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Problems solved by technology

The present invention is mainly used to solve the problem that when the existing drawing die is stamping, the blank-holding force on the plate to be stamped will increase with th

Method used

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  • Deep drawing die based on variable blank holder force control
  • Deep drawing die based on variable blank holder force control
  • Deep drawing die based on variable blank holder force control

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Example Embodiment

[0032] In order to make it easy to understand the technical means, creation features, achieved goals and effects of the present invention, the present invention will be further described below with reference to the specific embodiments.

[0033] like Figure 1 to Figure 5 As shown, a drawing die based on variable blank holder force control, including upper fixed plate 1, lower fixed plate 2, guide sleeve 3, guide post 4, punch 5, fixed seat 6, die 7, ejection mechanism 8 and a pressing mechanism 9; the upper fixing plate 1 and the lower fixing plate 2 are connected through the sliding fit between the guide post 4 and the guide sleeve 3; the upper fixing plate 1 is provided with the Punch 5; the upper end of the punch 5 is fixedly connected to the lower surface of the upper fixing plate 1 through the holder 6; the die 7 is arranged below the punch 5; the lower end of the die 7 Fixedly connected on the upper surface of the lower fixed plate 2; the ejection mechanism 8 is set in...

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Abstract

The invention belongs to the technical field of punching dies, and specifically provides a deep drawing die based on variable blank holder force control. The deep drawing die comprises an upper fixedplate, a lower fixed plate, guide sleeves, guide columns, a male die, a fixed base, a female die, an ejecting mechanism and a pressing mechanism. The pressing mechanism comprises a pressing plate, guide rods, second springs, a regulation plate, limiting ejection rods and guide sleeves. In the deep drawing die, the pressing plate in the pressing mechanism makes contact with a to-be-punched plate, then the edge of the to-be-punched plate is pressed, then the limiting ejection rods make contact with the upper surface of the female die, and therefore the regulation plate is limited to continue toget close to the pressing plate, the second springs between the regulation plate and the pressing plate are limited to continue to be compressed, the extrusion force provided by the second springs islimited to continue to increase, it is ensured that the blank holder force provided by the pressing plate for the to-be-punched plate cannot be increased along with increase of the deep drawing height, the problem of blank holder fracture caused by excessively-large blank holder force is prevented, and precision and quality of thin plate punching are improved.

Description

technical field [0001] The invention belongs to the technical field of stamping dies, in particular to a deep drawing die based on variable blank holder force control. Background technique [0002] Wrinkling and cracking are the main failure modes of sheet drawing. The size of the blank holder force and the loading method are one of the important factors affecting the wrinkling and fracture. The traditional blank holder force control method is generally based on increasing the loading mode, that is, with The punch stroke decreases and the blank holder force increases linearly; while the variable blank holder force control is to apply a time-varying blank holder force at different times when the stamping flange shrinks during the sheet drawing forming process, or when the stamping flange shrinks. At different positions, apply different blank holder forces that vary with time. By adjusting the positive pressure at each point, the frictional resistance of the contact surface be...

Claims

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Application Information

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IPC IPC(8): B21D22/22B21D37/10B21D37/12
CPCB21D22/22B21D37/10B21D37/12
Inventor 李钦生樊卫强徐亮陈宗祥刘德睿刘子俊李硕
Owner ANHUI TECHN COLLEGE OF MECHANICAL & ELECTRICAL ENG
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