Drawing and bending molding process and die of refrigerator backboard

A technology of bending forming and drawing dies, which is applied in the direction of forming tools, manufacturing tools, metal processing equipment, etc., can solve the problems of high production cost and low product quality, eliminate product distortion, reduce product forming processes, and save production The effect of device resources

Active Publication Date: 2010-07-07
QINGDAO HAIER MOLDS
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The invention provides a drawing and bending forming process for the back panel of a refrigerator a

Method used

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  • Drawing and bending molding process and die of refrigerator backboard
  • Drawing and bending molding process and die of refrigerator backboard
  • Drawing and bending molding process and die of refrigerator backboard

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Such as figure 1 with Figure 4 As shown, a drawing and bending forming process of a sheet metal blank of a refrigerator back steel plate comprises the following steps:

[0031] a, drawing: take rectangular sheet metal blank 11, adopt drawing die 20, such as figure 2 As shown, the drawing die includes an upper mold part and a lower mold part, and the upper mold part is an upper supporting plate 21, an upper foot 22, an upper cover plate 23 from top to bottom, and the upper cover plate 23 is connected with a push rod below 24, the upper die base 25 is connected below the upper pad foot 22, the upper backing plate 26 is connected under the upper die base 25, the upper stripping plate 27 and the punch 28 are connected under the upper backing plate 26, and the four corners of the upper die base 25 are provided with Punch 25-1, ...

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Abstract

The invention provides a drawing and bending molding process and die of a refrigerator backboard, which can solve the problems of low product quality and high production cost in the prior art. The technical scheme comprises the following steps: drawing: taking the sheet-metal blanks of the refrigerator backboard, pressing the peripheric edges of the sheet-metal blanks by employing a material-pressing bead and a material-pressing slot on a drawing die to form draw beads, carrying out shallow stretching on the middle parts of the sheet-metal blanks by employing a male die of the drawing die and forming gaps between two adjacent edges of the sheet-metal blanks through cutting; and bending: carrying out bending around the sheet-metal blanks subjected to shallow stretching by employing bending blades on a bending die and simultaneously flattening the draw beads. The invention also provides the molding die special for the refrigerator backboard with the technological draw beads. The invention can get rid of the defect of product distortion, reduce the product molding procedures, save a set of dies and save the cost of raw materials, labor, etc.

Description

technical field [0001] The invention relates to a drawing and bending forming process of a refrigerator back panel and a mold thereof. Background technique [0002] The existing sheet metal blank products used for refrigerator back steel plates generally have three steps in the forming process: 1. drawing forming; 2. drop punching; 3. bending forming. After the product is formed, it is easy to distort and deform. Because the stretching needs to reserve the amount of second-order blanking, the size of the blank in the first process is large, which wastes raw materials; On the surface, the size of the blank will be larger; after forming with a tensile structure, the product's circumference is not uniform. The drop punching die in process 2 is designed to cut the circumference of the product, and the circumference of the product is trimmed by blanking. The mold is relatively large. More materials, more processing, and higher mold costs. [0003] To sum up, the existing sheet ...

Claims

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Application Information

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IPC IPC(8): B21D35/00B21D22/20B21D5/01B21D37/10
Inventor 王庆海鲁旭东李春阳邵建刚徐萍
Owner QINGDAO HAIER MOLDS
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