RU78102U1 - WOLF FOR MANUFACTURING MULTI-FACE SHAPED PROFILES - Google Patents

Abstract

The utility model relates to drawing production and can be used for drawing multifaceted shaped products. The technical problem solved by the claimed utility model is to increase the durability of the die in the manufacture of high-quality shaped profile in one pass. The problem is solved in that the number of sector elements 3 forming the working channel 4 in the die is equal to the number of faces of the manufactured profile, while on the surface of the crimping section 5 of the working channel 4 of each sector element 3, a protrusion 7 is made in the form of a tetrahedron, one of the faces of which lies in the plane of the crimp section 5, the other two faces 8 are turned into the inside of the working channel 4, and the rib 9, formed by the intersection of these faces 8, is inclined to the axis of the working channel 4 at an angle (α) of 8-12 °. Moreover, the length of the protrusion 7 is equal to the length of the crimp section 5, and its top 10 is located on the border of the crimp 5 and calibrating 6 sections of the working channel 4 with an equal distance from the sides of the sector element 3. 5 ill.

Description

The utility model relates to drawing production and can be used as a tool for drawing multifaceted shaped products.

Known dragging for drawing multifaceted shaped profiles, the working channel of which consists of crimp and gauge zones having polygons in cross sections. In this case, polygons in the cross sections of the crimp die zone are made with concave sides having a constant radius of rounding along the sections and a deflection arrow decreasing towards the calibrating zone, and polygons in the cross sections of the gauge die zone are made with rectilinear sides (see Pat. RF № 2236921, B21C 3/00).

The disadvantages of this die are low durability and low quality of manufactured products. This is due to the fact that the deformation of the workpiece in the crimp zone of the fiber is accompanied by significant metal pressure on the working surface of the zone, which leads, due to stress concentration, to the appearance of fatigue cracks in the corners of polygons forming a cross section of the crimp zone of the fiber, and, accordingly, to fracture last one. In addition, during the process of drawing the billet, intense uneven wear of the fillet crimping rounds occurs, which entails insufficiently complete filling of the billet with a calibrating fiber strip by the metal of the billet. As a result, the geometry accuracy of the manufactured profile is reduced.

The closest analogue to the claimed object is a die containing a housing, inside of which an insert is pressed in made of carbide sector elements forming a working channel, consisting of crimp and gauge sections (see US Pat. RF No. 2101109, B21C 2/02).

A disadvantage of the known die is the impossibility of manufacturing multifaceted shaped profiles of high quality due to the fact that in the reducing section of the die, the workpiece will be deposited without compression along the wall, and in the crimp section, the metal of the workpiece will not fill the corners of the formed profile. In addition, a significant specific pressure of the workpiece on the die during the manufacturing process of the product will lead to increased wear of its working channel and the formation of fatigue cracks in it, which will reduce the durability of the die.

The technical problem solved by the claimed utility model is to increase the durability of the die in the manufacture of high-quality shaped profile in one pass.

The problem is solved in that in the die for the manufacture of multifaceted shaped profiles containing a housing inside which an insert is pressed made of hard-alloy sector elements forming a working channel, consisting of crimping and gauging sections sequentially located along the drawing, according to the change, the number of sector elements forming the working channel is equal to the number of faces of the manufactured profile, while on the surface of the crimp section of the working channel of each sector element The protrusion is made in the form of a tetrahedron, one of the faces of which lies in the plane of the crimp section, the other two faces face the interior of the working channel, and the edge formed by the intersection of these faces is inclined to the axis of the working channel at an angle (α) of 8-12 ° and the length of the protrusion is equal to the length of the crimp section, and its top is located on

the border of the crimping and calibrating sections of the working channel with an equal distance from the sides of the sector element.

The essence of the utility model is illustrated by drawings, where:

- figure 1 - shows a General view of the die, a partial section;

- figure 2 is a view a in figure 1;

- figure 3 is a fragment of the crimp zone of the working channel of the sector element;

- figure 4 is a section bB in figure 1;

- figure 5 is a section bb in figure 1.

The inventive die for the manufacture of multifaceted shaped profiles contains a housing 1 (Fig.1, 2), inside of which an insert 2 is pressed, made of carbide sector elements 3 (Fig.2, 3). The number of sector elements 3 is equal to the number of faces of the formed profile. Sector elements 3 form a working channel 4 (figure 2), consisting of a sequence of crimp section 5 (figure 1) of length L _oy and a calibrating section 6 (figure 2, 4) of length L _ku , having a cross section the shape of a regular hexagon. Each sector element 3 (Figs. 1-3) has a protrusion 7 made in the shape of a tetrahedron, one of the faces of which lies in the plane of the crimp section 5, and two lateral intersecting faces 8 face the inside of the working channel 4. Rib 9 (Fig. 1 -3), formed by the intersection of these faces 8, is inclined to the axis of the working channel 4 at an angle (α) of 8-12 °. In this case, the protrusion 7 (Figs. 1-3) is located on the crimp section 5 of each sector element 3 so that its vertex 10 lies on the border of the crimp 5 and calibrating 6 sections and is equidistant from the sides of the sector element 3, and the length of the protrusion 7 is equal to the length crimp section 5.

The proposed shape of the protrusions 7 and their placement in the crimp section 5 (figure 5), the working surface of which is made in the form of a polyhedron, contributes to the flow of the deformable metal into the corners of the working channel 4

dies and provides a shaped profile with the exact geometry of the ribs. In addition, the wear resistance of the die increases due to a more even distribution of stresses arising in this area.

When the angle (α) of the inclination of the rib 9 of the protrusion 7 to the axis of the working channel 4 is less than 8 °, the flow of the metal of the workpiece into the corners of the working channel 4 of the crimp section 5 formed by the lateral faces of 8 adjacent protrusions 7 is hindered. In this case, the edges of the manufactured shaped profile are not completely formed, and therefore, in the cross section of the profile, the diameter of the circumscribed circle of its polygon becomes less than the diameter regulated by GOST, which indicates the marriage of the product.

When the angle (α) of the inclination of the rib 9 of the protrusion 7 to the axis of the working channel 4 is more than 12 °, the drawing forces increase significantly, which reduces the stability of the drawing process due to the high probability of metal breakage. In addition, increased drawing forces cause intense wear of the protrusion 7 of the working channel 4 of the die.

Woloka works as follows.

The workpiece (not shown in FIG.) Is fed into the working channel 4 (FIG. 2) of the die, where the metal of the workpiece, falling into the crimping section 5 (FIG. 1) of the insert 2, starts to come into contact with the faces 8 (FIG. 3) and ribs 9 protrusions 7. In this case, the protrusions 7 (Fig. 1) provide directed uniform flow of the workpiece metal along the working channel 4 of the crimp section 5, which contributes to uniform wear of the latter. At the same time, the workpiece metal spreads along the faces of 8 protrusions 7 of the crimp section 5 to the joint zones of adjacent sector elements 3 and moves along the ribs 9 of the protrusions 7 in the direction of the calibrating section 6. At the same time, these joint zones are completely filled with the workpiece metal, and the metal pressure arising from this evenly distributed over the entire surface of the crimp sections 5 of the sector elements 3. This increases the fatigue strength and wear resistance of the insert 2 dies, and, consequently, leads to an increase in long-term spine last.

The workpiece metal distributed in this way over the entire cross section of the crimp section 5 of the working channel 4, entering the calibrating section 6 of the working channel 4 of the die, ensures its full filling, while forming the exact geometry of the edges of the manufactured profile, which helps to improve the quality of the latter.

Thus, the inventive design of the die allows, while increasing its durability, to ensure the manufacture of shaped profiles of high quality in one pass.

Claims (1)

A die for the manufacture of multifaceted shaped profiles, comprising a housing inside which an insert is pressed in made of carbide sector elements forming a working channel, consisting of crimping and gauging sections sequentially located along the drawing, characterized in that the number of sector elements forming a working channel is the number of faces of the manufactured profile, while on the surface of the crimp section of the working channel of each sector element, a protrusion in the form of a tetrahedron is made a, one of the faces of which lies in the plane of the crimp section, the other two faces are turned inside the working channel, and the edge formed by the intersection of these faces is inclined to the axis of the working channel at an angle (α) of 8-12 °, and the length of the protrusion is equal to the length crimp section, and its top is located on the border of the crimp and gauge sections of the working channel with an equal distance from the sides of the sector element.