Facility for continuous angular pressing

FIELD: metallurgy.

SUBSTANCE: facility contains driving rotor wheel with gauge, shoe with insert and support. Specified elements have work surface, forming pressing channel. Support is installed on area, which is moved by means of thrust screw for slide control of pressing channel height. As a result of this regulation cross-section of channel on outlet from deformation site have to be 3-5% exceeding cross-section at inlet into deformation site.

EFFECT: cost cutting of blanks treatment.

1 dwg

 

The invention relates to deformation processing of metals and can be used to obtain long ultrafine-grained (UMP) metal parts and products with improved physical-mechanical properties for engineering and other industries.

The known device for hardening materials in a manner equal channel angular pressing (pressing), which implements the scheme of deformation in simple shear. The deformation of workpieces and, accordingly, the hardening of the material occurs due to, for example, changes in the vertical direction of the channel on the horizontal, while the deformation zone is formed in the area of change in this direction. Typically, these devices consist of a matrix with intersecting it at an angle channels pressing and punch (Wmel, Vigaplus, Viesnica "a plastic structure formation metals", Minsk: Nauka and Technica, 1994). The process of formation of UMP patterns involves multi-cycle processing of a single workpiece with the number of cycles from 4 to 12 (Valiev R.Z., Alexandrov I.V. "Nanostructured materials from severe plastic deformation", M, Logo, 2000).

The main disadvantage of these devices is limited geometrical parameters of the processed workpieces, their length about what commonly is 5-7 source diameters. Also UMP billets produced at such facilities, are characterized by low use of metal (KIM) in the range of 0.5-0.7 due to distortion of the end parts of the blanks and the need to remove them to make the blanks the correct shape in the form of a cylinder or a parallelepiped, which negatively affects the economic performance of the process of formation of UMP patterns. At the same time, the use of such blanks to obtain UMP long rods or wire requires further processing, for example, by rolling or drawing, which also increases the intensity of obtaining long UMF products.

The closest technical solution is a device for pressing in terms of "conform" with the aim of strengthening materials (Wmel, Vigaplus, Viesnica "a plastic structure formation metals", Minsk: Nauka and Technica, 1994, s). The device includes a housing with fixed therein driving the impeller with a U-shaped gauge block with insert and emphasis. Channel extrusion is formed by walls of a U-shaped caliber drive the impeller and the working surfaces of the inserts and emphasis. Grip the workpiece at the initial stage and power conditions the pressing process are formed by creating active friction forces that occur on the walls of a U-shaped gauge the wheel. Creating active friction forces this installation is ensured due to the gradual narrowing and reduction of cross-section of the channel extrusion, which provides an eccentric insert secured in the Shoe. Arc length of capture is initially calculated value and, as practice shows, is largely dependent on the process parameters, the brand of the compression of the material, temperature, lubrication, surface roughness of the working surface, etc. Optimization of geometrical parameters of the arc of engagement with the point of view of the selection of the minimum required length requires the installation of the insert with a new geometry or Refine an existing one. Moreover, as the wear of the working surfaces of the stop and insert pads increases the cross-sectional dimension of the workpiece and, accordingly, the arc of engagement, and a higher torque is needed for carrying out the pressing process. All of this ultimately leads to higher material and energy costs during long-term operation.

The objective of the invention is a device that allows the process of formation of long metal materials with a ratio of long diameter of more than 100 UMP patterns with minimal material and energy costs. In this case, the proposed design of the device is equipped with an option that allows you to ensure that% the SSE prolonged use the lowest possible arc grip and torque to drive the impeller, at a fixed eccentricity of the insert, which is a calculated value.

This object is achieved due to the fact that the device for continuous angular pressing, includes driving the impeller with the caliber of the pad with insert and emphasis, done with work surfaces forming the channel of the extrusion. When this channel extrusion has a cross-sectional area at the exit from the area of deformation by 3-5% greater than at the entrance. The emphasis is set on a sloping site with the ability to move and smooth height adjustments cross-sections, respectively, and its area to ensure the above-indicated difference of squares by the propeller thrust.

The invention is illustrated by a drawing depicting a schematic diagram of the device. The device consists of a casing 1 and installed in it the drive of the impeller 2, the pad with insert 3 (insert not shown), the stop 4, the inclined platform 5, the screw thrust 6.

The principle of operation of the device for the formation of UMP patterns in the metallic material includes a step of setting the optimal conditions of capture and their adjustment during operation. Stage setting the optimal conditions of capture includes the following operations. By rotation of the screw thrust 6 and the vertical movement of the movable super is 5, the output of the deformation zone cross-section of the channel extrusion is set to 5 - 6% more compared to weekends. After this initial billet is placed in a U-shaped caliber of the drive impeller 2 and the delayed active forces of friction in the channel of the extrusion. Resting on the working surface of the stop 4, the workpiece changes its direction of motion, warping scheme is simple shear. While the cross-section takes the form similar to a parallelepiped. When the second loop and the subsequent workpiece is rotated clockwise by 90 degrees around the longitudinal axis and is placed in the channel of the extrusion. Changing in the next round trips height output channel pressing in towards its reduction by rotation of the screw thrust 6 select the minimum length of the arc of engagement, in which there is a capture of the workpiece and its deformation. Typically, the difference of the squares of the channel pressing at the entrance to the deformation zone and the exit for optimal conditions is 3%-5%. Creation of optimal conditions for the arc of the grip ensures minimum friction path with insert pads surface of the workpiece, which contributes minimal wear insert from passive friction forces. These conditions correspond to the minimum necessary time for carrying out the deformation. As wear of the working surfaces of the stop 4 and the insert during long-term operation is conducted to retireve cross section of the channel pressing the exit of the deformation zone, that allows you to provide baseline minimum required torque for holding the strain.

Thus, the claimed invention allows long metal materials with the ratio of length to diameter of more than 100 UMP structure with minimal material and energy costs over a long period of operation.

Device for continuous angular pressing, containing driving the impeller with the caliber of the pad with insert and emphasis, done with work surfaces forming a channel pressing, characterized in that the emphasis placed on the platform, with the ability to move through the thrust screw to ensure a smooth height adjustment channel pressing obtaining cross-sectional area at the exit of the deformation zone, which is 3-5% greater than the cross-sectional area at the entrance to the deformation zone.



 

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FIELD: technological processes.

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EFFECT: expansion of technological resources.

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FIELD: technological processes.

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EFFECT: improved accuracy of forging process, enhanced quality of ready products.

13 cl, 16 dwg

Tool for pressing // 2097160
The invention relates to a pressure treatment of materials, and more specifically to a tool for pressing products with fixed and variable length cross-sectional sizes, and can find application in the metallurgical and machine-building industries
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