Carbide matrix for the landing of polyhedral products

 

The invention relates to the processing of metals by pressure and can be used in the manufacture of polyhedral parts, such as nuts. Carbide matrix contains the clip that covers the sleeve with the multifaceted hole. In the opening indicated pressed carbide insert, consisting of separate sections, made in the form of prisms of trapezoidal cross-section with cut corners on the outside of the ends. The number of sections corresponds to the number of faces of the landed product. Cuts angles are symmetrical faces working end. The verge sleeve coupled between a radius equal to the thickness of the section. The thickness of the section chosen from a specified range. The result is a hardening of the matrix and saving hard alloy, which is made section of the insert. 1 Il.

The invention relates to the field of metal forming and can be used in the manufacture of polyhedral parts, such as nuts.

Known carbide matrix for the landing faceted products, made in the form of a cage with pressed therein carbide insert, consisting of separate sections, the number kinologicheskii calculations. Governing technical material RTM 37.002.0208-81. Chevrolets. Bitter: 1983, S. 197, damn. 110).

The disadvantage of the matrix is that the build process it is difficult, and for the production of sections of the insertion spent a lot of hard alloy.

Known carbide matrix for the landing faceted products, made in the form of a shroud covering sleeve with pressed therein carbide insert, consisting of separate sections, the number of which corresponds to the number of faces of the landed product, and the partition insert is made in the form of prisms of trapezoidal cross-section with cut corners on the outside of the ends (and.with.The USSR №489576, CL 21 J 13/02, 1975).

The disadvantage of a matrix is its low resistance, because after prolonged use of this matrix there is a deterioration of the Central part of the working faces of the sections, resulting in a matrix fails. In addition, because of the presence of stress concentrators in the corners of the polyhedral holes in the sleeve it is destroyed under the influence of the variables of the dynamic loads transmitted to it by the sections for stamping. To increase the resistance of the sleeve, and hence the matrix is necessary to balance the tensile stresses, which requires ustechnical nature of the present is carbide matrix for the landing of polyhedral products contains a clip covering the sleeve with the multifaceted hole and pressed therein carbide insert, consisting of individual, made in the form of prisms of trapezoidal cross-section with cut corners on the outside of the ends of the sections, the number of which corresponds to the number of faces of stocked products, and sliced corners have symmetrical faces working end.with.The USSR №564071, CL 21 j 13/02, 1977).

This matrix has the following disadvantages:

- large size sections paste;

- low resistance bushing due to the presence of hubs in the voltage angles of the polyhedral holes, leading to the destruction of the sleeve under the influence of variables dynamic loads for stamping. In order to avoid destruction of the bushing, it is necessary to increase the dimensions of the sleeve and the housing.

The invention solves the problem of increasing resistance of the matrix and saving hard alloy section insert.

This problem is solved by the fact that in the proposed matrix containing the clip covering the sleeve with the multifaceted hole pressed therein carbide insert, consisting of individual, made in the form of prisms of trapezoidal cross-section with cut corners on the outside of the ends of the sections, the number of the second end, according to the invention in the sleeve with the multifaceted face hole coupled between a radius equal to the thickness b of the section, the thickness b of a partition is selected from the range

1/2Sb2/3S

where S is the size of the turnkey plant products.

By sections inserts data is achieved by minimizing the overall dimensions of the sections of the matrix and, consequently, the savings of hard alloy. The execution of the thickness of the sections is less than 1/2S will lead to their destruction, and the execution of the thickness of the sections over 2/3S will unnecessarily increase the size of the sections.

To increase the durability of the matrix compared to the prototype with the same dimensions, but a reduced thickness sections of the insert is achieved, firstly, due to the possibility of targeting large compression stress in the inner layers of the sections and in the sleeve, which will balance the tensile stresses that occur in the landing, and will reduce the amount of the maximum variable voltage, secondly, by eliminating sources of stress concentration in the multi-faceted sleeve opening.

In addition, with this construction, the sections may have two faces as working for h is but.

The drawing shows the proposed matrix.

Carbide matrix for the landing of polyhedral products consists of a casing 1, a sleeve 2 with the multifaceted hole and pressed therein carbide insert, consisting of separate sections 3. The number of sections corresponds to the number of faces of stocked products, and each section is made in the form of a prism trapezoidal cross-section with cut corners on the outside of the ends, and sliced corners have symmetrical faces working end. In the sleeve 2 with the multifaceted hole faces interconnected at the radius R, i.e. at the intersection of faces caused radii equal to the thickness b of section 3. The thickness b of each section 3 shall be not less than 1/2S and no more than 2/3S, where S is the size of the turnkey plant products.

The use of this matrix in production will provide significant savings by increasing the resistance of the matrix and reduce the amount of solid alloy sections inserted.

Claims

Carbide matrix for the landing of polyhedral products containing clip covering sleeve with the multifaceted hole pressed therein carbide insert, consisting of individual, made to see the number of faces of stocked products, and sliced corners have symmetrical faces working end, wherein the sleeve with the multifaceted face hole coupled between a radius equal to the thickness b of the section, the thickness b of a partition is selected from the range

1/2Sb2/3S

where S is the size of the turnkey plant products.



 

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Using this stamp // 2201835
The invention relates to the processing of products by pressure

FIELD: metal working.

SUBSTANCE: hard alloy matrix has casing, bushing pressed in the case and hard alloy insertion. Bushing has multifaced hole. Hard alloy insertion is composed by several sections made in form of trapezoidal-section prisms which have cut angles at their non-working edges. Number of sections corresponds to number of faces of item to be headed. Cuts of angles are made symmetrically to faces of working edge. Slits are made in several places of multifaced hole bushing at the ponts where faces cross each other.

EFFECT: improved resistance of matrix; simplified assembly.

3 cl, 1 dwg

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