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An electric assisted repeated deep drawing device

A technology of electric auxiliary and forming devices, which is applied in the direction of feeding devices, positioning devices, storage devices, etc., can solve problems such as residual stress, difficult bottom drawing, cracking, etc., achieve high forming efficiency, less labor time-consuming, and improve forming extreme effect

Active Publication Date: 2022-03-29
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, problems such as difficulty in deep drawing, cracking, residual stress and how to increase the forming limit of the sheet when the bottom of the cylindrical part is deep drawn need to be solved in production.

Method used

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  • An electric assisted repeated deep drawing device
  • An electric assisted repeated deep drawing device
  • An electric assisted repeated deep drawing device

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0025] Specific embodiment: place the plate vertically in the groove formed by the first clamping part 12 and the second clamping part 15, the first electrode 5 and the second electrode 7 are externally connected to the power line, the third electrode 11 and the fourth electrode The electrode 16 is externally connected to the zero line of the power supply, and the pneumatic cylinder of the horizontal press applies the same and opposite pressure at the same time to clamp the sheet. At the same time, the first die 3 and the second die 8 press the upper end of the sheet, the third The die 10 and the fourth die 17 press the lower end of the sheet, and the piston rod applies the same and opposite pressure to the first die 3 and the second die 8 at the same time, and the piston rod simultaneously presses the third die 10 and the fourth die. The die 17 exerts the same and opposite pressure to prevent the sheet from wrinkling. The current flows through the sheet from the first electrod...

Embodiment 1

[0030] Comparison of the Vickers hardness of different positions of the workpiece under the traditional deep drawing and the electric assisted repeated deep drawing of the present invention when the aluminum alloy sheet is used for deep drawing:

[0031]The position a is at the center of the bottom of the workpiece. The average hardness of the traditional process is 64.8HV1 / 15. The hardness of the electric-assisted repeated deep drawing is 67.2HV1 / 15, and the hardness of the electric-assisted repeated deep drawing is 71.7HV1 / 15. , position b is the flat area at the bottom of the workpiece, the average hardness of the traditional process is 64.7 HV1 / 15, the hardness of the electric-assisted repeated deep drawing once-drawn workpiece is 67.4HV1 / 15, and the hardness of the electric-assisted repeated deep-drawn second-drawn workpiece is 71.8HV1 / 15 15. Position c is the transition fillet of the bottom surface of the workpiece. The average hardness of the traditional process is 68.4 ...

Embodiment 2

[0033] Comparison of Vickers hardness at different positions of the workpiece under traditional deep drawing and electric assisted repeated deep drawing when low carbon steel is used for deep drawing:

[0034] The position a is the center of the bottom of the workpiece. The average hardness of the traditional process is 142.6HV1 / 15. The hardness of the electric-assisted repeated deep drawing once drawn workpiece is 146.5HV1 / 15. , position b is the flat area at the bottom of the workpiece, the average hardness of the traditional process is 142.5 HV1 / 15, the hardness of the electric-assisted repeated deep drawing once drawn workpiece is 146.8HV1 / 15, and the hardness of the electric-assisted repeated deep drawn second drawn workpiece is 151.3HV1 / 15 15. Position c is the transition fillet on the bottom surface of the workpiece. The average hardness of the traditional process is 147.3HV1 / 15. The hardness of the electric-assisted repeated deep-drawing once-drawn workpiece is 151.2HV1...

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Abstract

The invention discloses an electrically assisted repeated deep drawing device, which comprises a sheet material clamping device fixedly arranged on a transverse press, a sheet material forming device connected with a piston rod of the press machine, and an electric current heating device fixedly arranged on the sheet material forming device device, the sheet material clamping device vertically fixes the sheet material on the sheet material forming device, and the current heating device closely adheres to the sheet material and generates Joule resistance heat to heat the sheet material. The present invention utilizes the electric current flowing through the sheet material The Joule resistance heat generated directly heats the sheet itself and keeps its temperature within the forming temperature range. Multiple electrodes are used to stabilize the temperature of the sheet during forming, and the die presses the sheet at the same time to prevent wrinkling and improve the product. Quality: Solve the problems of difficulty in deep drawing, cracking, and residual stress at the bottom of the cylindrical part during the deep drawing process, and improve the forming limit of the sheet metal.

Description

technical field [0001] The invention relates to the fields of stamping technology and electronic technology, in particular to an electric-assisted repeated deep-drawing device. Background technique [0002] Deep drawing, also known as drawing, stretching, calendering, etc., refers to the process of stamping a certain shape flat blank obtained after blanking into various open hollow parts or reducing the diameter and increasing the height of the open hollow blank by using a mold. A machining process. The deep drawing process can be used to manufacture cylindrical, stepped, conical, spherical, box-shaped and other irregularly shaped thin-walled parts. Cooperating with other stamping forming processes such as flanging, bulging, flaring, and shrinking, it can also manufacture parts with extremely complex shapes. Therefore, in the production process of automobiles, aircrafts, tractors, electrical appliances, instruments, electronics and other industrial sectors, the deep drawin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/22B21D37/16B21D43/00B21D37/10B21D55/00
CPCB21D22/22B21D37/16B21D43/003B21D37/10B21D55/00
Inventor 吕知清李瑞鑫张兴红周冰娆张晓超
Owner YANSHAN UNIV
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