Device for materials processing by pressure

FIELD: engines and pumps.

SUBSTANCE: device for processing comprises puncheon and upper and lower semi-matrices fixed on base. Semi-matrices are arranged, accordingly, with vertical and horizontal intersecting channels. Lower semi-matrix consists of two parts, which may rotate in opposite directions by means of rigidly fixed gear wheels. Horizontal channel is arranged with cross section, having shape that differs from circular one. At the outlet of horizontal channel, coaxially to it, replaceable orifice is installed. Orifice is rigidly fixed to lower semi-matrix and has hole, which is less than outlet hole of horizontal channel provided that internal pressure in billet makes 5-10 GPa. Vertical channel has inlet part. Area of this part cross section exceeds area of vertical channel cross section 2-10 times. Horizontal channel has inlet cylindrical part. Diameter of cross section D of this part is equal to diameter of vertical channel cross section, and length A makes (0.1-2) D. Parts of lower semi-matrix are installed with clearance in horizontal channel equal to 0.05-0.5 mm.

EFFECT: improved mechanical properties and quality of processed billets.

2 dwg

 

The invention relates to the field of materials processing pressure, in particular to a device for increasing the strength and ductility of the material during processing.

A device for processing metals by pressure (patent RF 2128095, MKI VS 25/00, publ. 27.03.99)containing the matrix is placed in it two intersecting channels. This device provides RKU-pressing and allows you to get massive workpieces of various shapes.

The disadvantage of this device is the inability to achieve high plastic strain.

It is also known a device for the combined treatment combining CGS-pressing and deformation of the torsion containing the punch, two polimetrica with vertical and horizontal intersecting channels is fixed on the base, and polimetrica with a horizontal channel is rigidly connected with the toothed wheel, providing rotation of the workpiece in a horizontal channel (Uteshev FS, Enikeev FU, V.V. Latysh, Petrov E., Valitov, VA Thermomechanical processing for the formation of ultrafine-grained structure by severe plastic deformation. Abstracts of the international conference ((Investigation and Application of Severe Plastic Deformation)), NATO Sc., 1999, s-77).

The disadvantage of this device is the inability to achieve high plastic deformations preserving the integral is the spine of the blank.

The closest to the invention is a device for material processing by pressure containing punch, two volumetric - top and bottom, respectively, with vertical and horizontal intersecting channels is fixed on the base, a gear wheel rigidly connected with the lower polimetrica and providing rotation of the workpiece in a horizontal channel replaceable washer installed at the outlet of the horizontal channel coaxial him and rigidly connected with the lower polimetrica. The vertical channel is made with the lead-in part having the cross-sectional area, 2-10 times greater than the cross-sectional area of the vertical channel, and the inner hole of the removable washer is less than the outlet of the horizontal channel and is determined on the basis of ensuring the internal pressure in the workpiece 5-10 GPA. The horizontal channel is sequentially located from the intersection with the vertical channel of the input cylindrical part with a diameter D1equal to the diameter of the cross section of the vertical channel, and the length And equal to (0,1-2)D1cone portion, a smaller base directed to the output of the horizontal channel, and output a cylindrical part with a diameter of D2equal to the diameter of the smaller base of the cone and the components of 0,6-0,95D1(Patent RF №2188091, IPC is S 25/00, publ. 27.08. 2002).

The known device allows you to deform the workpiece by equal-channel angular pressing and simultaneously subjecting it to deformation by torsion.

However, in the known device is not ensured even severe plastic deformation, and, in addition, does not exclude the possibility of turning the workpiece within the lower polimetrica during the rotation of the gears, which leads to anisotropy of mechanical properties along the length of the workpiece.

Object of the invention is the enhancement of the mechanical properties and quality of the processed workpieces by increasing the efficiency of deformation and regulation of the process of torsional strain.

The problem is solved by a device for material processing by pressure, containing a punch fixed on the basis of the upper and lower volumetric performed respectively with vertical and horizontal intersecting channels installed on the output of the horizontal channel coaxial him and rigidly connected with the lower polimetrica replaceable washer, the hole which is smaller than the outlet of the horizontal channel of the conditions ensure the internal pressure in the workpiece 5-10 HPa, the vertical channel is made with the lead-in part having the cross-sectional area, 2-10 times greater than the cross-sectional area ve the vertical channel, and a horizontal channel input has a cylindrical part with a diameter D equal to the diameter of the cross section of the vertical channel, and the length And equal to (0,1-2)D, which unlike the prototype lower polimetrica made of two parts mounted for rotation in opposite directions by means rigidly associated gear wheels, a horizontal channel with cross-section having a shape other than round, and referred to part of the lower polimetrica is arranged with a clearance in the horizontal channel, 0.05-0.5 mm

When performing deformation in the known devices, in particular in the prototype, there is heterogeneity of structure, to decrease which, as a rule, it is necessary to significantly increase the degree of plastic deformation or apply two-component circuit loading, which is most effective. The torsional deformation in the small gap between the parts of the bottom volumetric increases the efficiency of the plastic deformation of the workpiece due to the intensive equiaxial grinding grain and implementation of a two-component circuit loading, which leads to the improvement of the mechanical properties of workpieces, such as strength and ductility. It also improves the quality of the processed workpieces by providing uniformity durable the local properties over the cross section of the workpiece.

Tests have shown that the clearance of 0.05-0.5 mm between the parts of the bottom polimetrica in the specified range ensures the achievement of the technical result of the invention. A gap of less than 0.05 mm implies that the probability of violating the integrity of the procurement (slice), and more than 0.5 mm - not provides effective deformation and uniform properties over the cross section of the workpiece.

The invention is illustrated by drawings, where figure 1 shows the proposed device for material processing pressure, and figure 2 shows the possible shape of the cross sections of the horizontal channel of the device.

The device comprises a plug 1, the upper polimetrica 2 with a vertical channel 3, which is installed in the workpiece 4, and the lead-in part 5, which fits plastic material 6. The vertical channel intersects with a horizontal channel 7, located in the lower polimetrica, consisting of two parts 8 and 9 which are rigidly fixed to the toothed wheels 10 and 11. Top polimetrica rigidly fixed on the base 12, on which is also fixed for rotation replaceable washer 13, is rigidly fixed on the output of the horizontal channel of the lower volumetric. Horizontal channel input has a cylindrical part with a diameter D equal to the diameter of the vertical channel, and the length And equal to (0,1-2)D. output horizontal ka the Ala is plastic material 14. Replacement washer 13 has an inner hole diameter of d=(0,1-0,95)D.

The device operates as follows.

In the vertical channel 3 fit plastic material 14 (e.g., lead). It is fitted with the workpiece 4, which in the lead-in part 5 of the vertical channel fits plastic material 6 (e.g., lead). Influencing it punch 1, push plastic material 14 and the workpiece 4 in a horizontal channel 7. Here the workpiece is passed through the input cylindrical part of the length of A, then a horizontal channel in parts 8 and 9 of the lower volumetric, where he has a cross-sectional shape other than round (figure 2). In the process of deformation of the plastic material 14 is forced through the hole diameter d replacement washer 13, which creates a force of backwater on deformable workpiece. Depending on the size of the inner hole of the washer 13 is provided, the value of the internal pressure in the workpiece equal to 5-10 GPA.

The workpiece 4, moving from the vertical channel 3 in a horizontal channel 7, is deformed at the intersection of the channels as in the equal-channel angular pressing, where the implemented scheme simple shear (first component loading). Further deformation of the workpiece is moving along the horizontal channel 7 (the second component Nagraj the deposits). Rotation through gear wheels 10 and 11 parts 8 and 9 of the lower volumetric in the opposite direction provides torsional deformation. The extent of this deformation depends on the magnitude of the gap In between the parts of the bottom polimetrica, and the angle of reciprocal rotation of the gear wheels 10 and 11. Due to the presence of noncircular cross section in the horizontal parts of the channel bottom polimetrica eliminates the turning of a workpiece within them during the rotation of the gears, resulting in deformation of the torsion is carried out in a narrow hearth, located in the gap, whose value is 0.05-0.5 mm

Thus, the proposed device allows you to deform the workpiece by equal-channel angular pressing and simultaneously subjecting it to deformation by torsion in the narrow hearth, thus ensuring the implementation of the scheme of two-component loading that creates a uniform intense plastic deformation in the workpiece material. In the improved mechanical properties of the workpiece, such as strength, ductility, excluded anisotropy of mechanical properties along the length of the workpiece, thereby improving the quality of the machined workpieces.

Unlike the prototype in the proposed method offers a wide range of regulation of the degree of plastic deformation at one about the od due to job or other kinematic parameters of movement of the tool, the selection process of the lubricant, the change of the geometrical characteristics of the channel in the area of the gap Century

A device for material processing by pressure, containing a punch fixed on the basis of the upper and lower volumetric performed respectively with vertical and horizontal intersecting channels installed at the outlet of the horizontal channel coaxially with him and rigidly connected with the lower polimetrica replaceable washer, the hole which is smaller than the outlet of the horizontal channel of the conditions ensure the internal pressure in the workpiece 5-10 HPa, the vertical channel is made with the lead-in part having the cross-sectional area, 2-10 times greater than the cross-sectional area of the vertical channel and a horizontal channel input has a cylindrical part with a diameter D equal to the diameter of the cross section vertical channel, and the length And equal to (0,1-2)D, wherein the lower polimetrica made of two parts mounted for rotation in opposite directions by means rigidly associated gear wheels, a horizontal channel with cross-section having a shape other than round, and referred to part of the lower polimetrica is arranged with a clearance in the horizontal channel, equal 005-0,5 mm.



 

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