Device for extruding direction products

 

(57) Abstract:

The invention relates to the processing of metals by pressure and can be used in the manufacture of products like shafts direct extrusion and reduction. The direction of the extruding products is carried out using three pins, spaced evenly around the circumference. The upper part of the pins are pressed into the pad, and the rest is installed in the sleeve covering the pins. The result is the straightness of the extruding product when the ratio of the length to diameter 15-17, and reduce friction in the direction of the extruding products. 1 Il.

The invention relates to mechanical engineering and can be used in the manufacture of shafts direct extrusion and reducing.

A device for extruding direction of products, consisting of a guide belt which has a diameter of 0.1 mm more than the calibrating point matrix and located at a distance equal to two, three diameters of the products obtained [1], [2].

However, direct extrusion shaft length equal 15-17 diameters of the product, you need to install four or five guide rings. Get premoli is 0.1 mm larger than the previous. In addition, increases the force of extrusion of increase friction on the guide belts rings.

It is also known a device for the direction of the extruding products consisting of several guide rings, and rings, adjustable by means of two screws, dewatering the product in a direction perpendicular to its axis [1].

However, when the squeezing shaft length 15-17 diameters must be installed at least two special rings, and at least two guide rings. When this setting special rings with screws to make difficult because it is necessary to provide an offset with screws, guides, belts special rings 0.05-0.1 mm in length, 8-10 diameter of the extruding products. The extrusion force also increases due to increase friction on the guide belts rings.

The known method the direction of the parts with pins [3], however, to apply this construction to the direction of the extruding metal is impossible, because in the flow of metal are the radial load on the guide pins, and they will thibetica in the direction of action of the load and to perform the function napravlyaushaya extruding products, ensure the straightness of the products obtained when the ratio of length to diameter 15-17 using 3 pins, which will not be thibetica under pressure radial loads acting in the course of extruding metal, and reduce friction in the direction of the extruding products.

The problem is solved due to the fact that in the known device for workpieces with pins top pins pressed into the gasket, and the rest is installed in the sleeve covering the pins.

The drawing shows a device for extruding direction of the products in accordance with the invention.

The device comprises a matrix 1, punch 2, the gasket under the matrix 3, which is pressed three hardened dowel pin 4. Under the gasket 3 is a plate 5, in which the sleeve 6, covering the guide pins 4.

The device operates as follows.

During the course of the punch 2 he presses down on the end face of the workpiece and the metal begins to be extruded through colubroidea point matrix 1.

After the release of metal from colubroidea points of the matrix 1 he gets in the guides between the three hot studs. While on the th, because the touch of the extruding product comes down the line. During the movement of the extruding metal between the three pins 4 are radial forces that can push the pins 4. To prevent this, use the gasket 3, which is pressed the upper part of the pins 4 and the rest of the pins 4 is located in the sleeve covering the pins. With this design guide pins 4 will not be thibetica under the action of radial loads along the entire length.

Sources of information

1. Ozonation plants as well With-6-2, processing pressure Design of dies for cold forming processes, Moscow, 1974, page 31, Fig. 16 a, b.

2. Cold forging. The Handbook, edited by G. A. Navrotsky, Moscow, Mashinostroenie, 1973, page 401, first paragraph.

3. Krainov A. F. Mechanics of machines. Fundamental dictionary, Moscow, engineering, 2000, pp. 385, 386, scheme b,W.

Device for extruding direction of the products containing the three posts, spaced evenly around the circumference, characterized in that the upper part of the pins are pressed into the pad, and the rest is installed in the sleeve covering the pins.

 

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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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