SU1609623A1 - Deforming member for broach - Google Patents

Abstract

The invention relates to the processing of metals by cold plastic deformation, in particular, to the processing of parts such as sleeves and pipes by deforming by pulling. The purpose of the invention is to reduce the cost of manufacture and increase the strength of deforming elements with a diameter of over 160 mm. This is achieved by the fact that the deforming element of the broach contains a carbide working and supporting parts, between which there is an intermediate layer with a thickness T _with ≤0.2R _in , where R _in is the radius of the opening of the deforming element, and this layer is made of a material whose elastic modulus ≥0.4 10 ⁴ kg / mm ² . This can significantly reduce the consumption of carbide, improve the accuracy, performance and reliability of the tool. 1 il.

Description

The invention relates to the processing of metals by cold plastic deformation, in particular, to the machining of parts such as sleeves and pipes by means of cold rolling.

The aim of the invention is to reduce the cost of manufacture and increase the strength of deforming elements with a diameter of more than 160 mm.

The drawing shows the proposed deformiruy1 1Y element 5 general view "

The deforming element consists of a working carbide ring 1, a support ring 2, between which there is an intermediate layer 3 with a thickness of tf. 052rg ,,, where Hz is the inner radius of the deforming element

The warping element works in the following way.

 Fitted to the rod, the protrusion 4 and secured with the help of spacer sleeves 5, the element enters the hole of the workpiece under the influence of the pulling force of the pulling machine. The passage through the opening, the deforming element simultaneously distributes it, since the diameter of the element is larger than the diameter of the hole in the part,

Making a deforming element of the proposed design allows making a carbide ring of an arbitrarily small size (sufficient for high-quality pressing and baking), and, not subjected to further processing, be connected to the bearing part by means of an intermediate layer. This element can be machined by grinding on a rough surface, providing the necessary geometry and surface roughness, since it will already have sufficient rigidity and strength,

The thickness of the intermediate layer is necessary to ensure the strength of the tool, determined on the basis of experiments, B, by deforming; the total thickness of the proposed construction at the thickness of the intermediate layer,; equal to or less than 0.2 of the inner radius of the deforming element, when using the material of the layer having a modulus of elasticity of 0.4-10 kg / mm, the strength of the solid carbide deforming is ensured; 1 its element. At the same time, with an increase in the outer diameter of the element,

0

Its strength increases, therefore, it can be used for machining holes over 160 mm in diameter with increased strength and with significant savings in hard alloy. In addition, the thickness of the working carbide part should tend to the minimum possible strength from the point of view of structural strength and limited to: chesky manufacturing options. The consequence of this is an increase in the strength of the deformation element for machining holes with a diameter greater than 160 mm.

Intermediate layer may be made of a material used for brazing, for example brass solder. This requires two

0 conditions: the melting point of this material should not exceed 800 ° C so that it does not affect the physicomechanical properties of the hard alloy, the wettability angle of this material should not exceed, since only under this condition will a reliable carbide bond be reached parts, In this case, the carbide part as it were soldered to the support.

The intermediate layer can also be made of a plastic material, such as aluminum, having a yield strength, where O t, is the yield strength of the material of the supporting part, in order to ensure high structural strength. In this case, the molten metal, such as aluminum, - L1 - in the gap between the carbide and support parts.

As an example, let us consider the results of a study of the strength of the deforming elements of a pre-designed structure with external diakatrash

160 and 200 mMs The intermediate layer in the elements was made of aluminum (E O. BODCH KKG / mmg), lead (E - 0.17.10 kg / km2) and tin-a (E O., 4 9x 10 kg / mm), . The thickness of the layer varied in the range of 0.1–05.3 of the inner radius of the elements, which was 30 mmo. Strength was evaluated by the magnitude of the pulling force causing the destruction of elements.

Comparative studies were carried out.

-5 tortures in the machining of parts. The change in the force of pulling was achieved by changing the tolgant walls of the machined parts.

40

45.

50

The table shows the results of research.

These data show that the proposed construction of a deforming element makes it possible to increase its strength by a factor of 1.2-3 under the condition that the modulus of elasticity of the material

VII,

the intermediate layer is E 0.4–10 kg / mm, the thick layer is less than or equal to 0.2 radius, and the holes in the element, the diameter of the holes to be machined are more than 160 mm. If these conditions are not fulfilled, the strength of the element is lower or close to that of the prototype. With an increase in the modulus of elasticity of the material of the layer E, the diameter of the deforming element and a decrease in the thickness of the layer, the intensity of the strength increases. So, with a lead elastic modulus of E 0.49 to 10 kg / mm, a layer thickness of 0.2rg, and a deforming element diameter of 160 mm, its strength is compared to proto16096236

 Thus, the use of the proposed deforming element makes it possible to qualitatively process holes with a diameter of more than 160 mm deforming 1-sh by pulling, to reduce the consumption of solid alloy, to improve accuracy, productivity and reliability while reducing the workmanship of bone processing compared to the known methods of processing such holes.

Claims (1)

Formula from acquired and tr The deforming element of the broach, containing 5 Deforming the working and supporting ring, characterized by the fact that, in order to reduce the cost of manufacture and increase the strength of deforming elements 20 with a diameter of 160 mm, by changing the elastic modulus of the material of the intermediate layer and its thickness, it is provided with an intermediate layer of material ™ n „„ in “e in, .2 times. A "p" "cpl-yawning of aluminum (E 0,675.10 kg / m"), "a spacing of the element, moreover, the deforming ring is made of hard alloy, and the intermediate layer is placed between the hard-tinted layer equal to 0, t g and the diameter of the deforming element 200 mm of its strength compared to the prototype Bbjuie 3 times.  , 6096236  Thus, the use of the proposed deforming element makes it possible to qualitatively process holes with a diameter of more than 160 mm deforming 1-sh by pulling, to reduce the consumption of solid alloy, to improve accuracy, productivity and reliability while reducing the workmanship of bone processing compared to the known methods of processing such holes. Formula from acquired and tr The deforming element of the broach, containing 5 Deforming the working and support ring, characterized by the fact that, in order to reduce the cost of manufacture and increase the strength of deforming elements 20 with a diameter of 160 mm, by changing the modulus of elasticity of the material, the continuation of the table Editor T. Parfenova Compiled by C, Chukaeva Tehred L. Serdyukova Order 3696 Circulation 610 VNII11I State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsu nab., A / 5 Production and publishing plant Patent, Uzhgorod, st. Gagarin, Proofreader E. Lonchakov Subscription