Forming device and method for four-side positioning screw

Abstract

The invention discloses a forming device and method for a four-side positioning screw. The device comprises a fourth die used for performing edge cutting on a blank material and comprising a fourth punching die and a fourth main mold; the fourth main mold comprises a fourth main mold shell, a first cushion block arranged in the fourth main mold shell, a second cushion block arranged in the fourthmain mold shell and located above the first cushion block, a fourth main mold core fixed to the second cushion block, and a fourth main mold ejecting pin; the first cushion block is elastically connected with the second cushion block; the fourth main mold core is used for containing the blank material; a head flange of the blank material located in the fourth main mold core faces the fourth stamping die; the fourth main mold ejecting pin sequentially penetrates through the first cushion block, the second cushion block and the fourth main mold core; and the second cushion block can move in thedirection of the first cushion block when the fourth stamping die and the fourth main mold are in a die assembly state, so that the fourth main mold ejecting pin abuts against the rod portion of the blank material. The scheme has the advantages of saving equipment cost and procedure circulation cost, improving the production efficiency and the like.

Description

Technical field[0001]The invention relates to the technical field of cold heading molds, in particular to a molding device and method for four-sided positioning screws.Background technique[0002]Such asfigure 1 withfigure 2 The four-sided positioning screw shown has a head flange 11 in a quadrilateral structure. Usually, in the production process, the main structure of the screw is first formed. At this time, the head flange 11 is round; then, the round head flange 11 is trimmed to make it a quadrilateral Head flange 11.[0003]Generally speaking, a more cost-effective and efficient method for producing the above-mentioned four-sided positioning screws is to cut the edges through the cold forging die while forming the main structure of the four-sided positioning screw. However, for the die installed on the press equipment, the die and the main die have a certain range of travel when moving up and down. When the four-sided positioning screw has a shorter dimension along the axis, it exc...

AI Technical Summary

Problems solved by technology

However, the mold installed on the press equipment has a certain travel range when the die and the main mold are moving up and down. When the minimum length of the edge part is reached, the thimble of the main mold moves up to the limit position but cannot touch the part. Therefore, it is difficult to trim it by means of mold trimming, and the only way to increase the process is to use a specific trimming machine. make individual trims

In this way, it will lead to lower production efficiency and higher cost.

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