How to crop heads, core products

 

(57) Abstract:

The inventive method of application crop head core products includes cutting the trim tool in the end surface of the head opposite to the rod side when the support matrix only part of the support surface of the head inside the projection of the cutting contour of the trim tool. 2 Il.

The invention relates to the production of core products with the head.

There is a method of trimming heads of core products used in the manufacture of hex bolts, including cutting cutting cutting tool in its end surface opposite to the rod side when the support matrix of the entire bearing surface of the head, inside the projection of the cutting contour of the trim tool on a plane perpendicular to the axis of the rod, followed by dartanium head attached to the rod axial forces in the absence of pressure on the matrix support surface of the head (1).

The disadvantage of this method great effort of trimming heads, due to the large surface area of contact of the billet head bolt with bearing surface of the matrix to them the material I head to its periphery.

The technical result achieved by the invention reduction efforts trimming heads of core products.

This is ensured by the fact that in the method of trimming heads of core products, including cutting the trim tool in the end surface of the head opposite to the rod side when the support matrix support surface of the head, inside the projection of the cutting contour of the trim tool on a plane perpendicular to the axis of the rod and subsequent dartanium head by the application of axial force to the end of the rod in the absence of pressure on the matrix support surface of the head, cutting the trim tool in the cylinder is produced with the support matrix of the support surface of the head.

The trim head on the proposed method requires much less effort, because the cutting of the trim tool into the head is not accompanied by friction on the contact bearing surface of the head with the matrix due to the fact that the bearing on the matrix are only part of the bearing surface of the head.

In Fig.1-left shows the initial incision, the right current ramping, Fig.2 is a left-end point of cutting, match the IG. 1) the trim tool 1 into the head of the billet bolt 2 creates a pressing of only part of the support surface of the head of the workpiece to the support surface of the die 3; F part of the surface of the head inside the projection of the cutting contour of the trim tool on a plane perpendicular to the axis of the rod blank, and neverauskas on the matrix during the whole process of cutting (shown by the dashed line).

Dartania head (Fig. 2) is produced by the application of force from the ejector 4 to the stem of the workpiece 2 in the absence of the bearing support surface of the head to the matrix 3.

At the final moment of dartania head is broken fin from the body bolt billet 2.

A method for cold forming bolt has significantly reduced the effort of trimming heads, increased resistance of the trim punch and matrix in comparison with the above-mentioned method of the prototype.

How to crop heads of core products, including cutting the trim tool in the end surface of the head opposite to the rod side when the support matrix support surface of the head, inside the projection of the cutting contour of the trim tool is RCU rod in the absence of pressure on the matrix mentioned bearing surface of the head, characterized in that the cutting of the trim tool in the cylinder is produced with the support matrix of the above the supporting surface of the head.

 

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