RU2063861C1 - Process of deforming-cutting-smoothing drifting-reduction of surfaces and gear for its implementation - Google Patents

Abstract

FIELD: plastic metal working. SUBSTANCE: working is carried out by uniform hydrodynamic throttling of lubricating-cooling technological medium through contact zones. Stabilization of throttling mode is conducted thanks to regular microrelief on contact surfaces of tool. Description gives versions for implementation of proposed process. In agreement with first version gear includes basing element, casing with dies and space for technological lubricating medium. Stabilizer of uniformity of throttling mode is made in the form of regular microrelief on contact surfaces of dies. In compliance with second version gear has basing element inside which there is space to put technological lubricating medium, clamping element in the form of casing with fixing conical surface and stabilizer of uniformity of throttling mode in the form of microrelief on contact surfaces of basing element and on working surfaces of drifting element. EFFECT: enhanced operational efficiency of process, simplified design of gear for its implementation. 4 cl, 3 dwg

Description

 The invention relates to the field of finishing hardening and shaping processing, specifically to methods of deforming-cutting-smoothing (DR-B) flashing-reduction of surfaces, and devices for its implementation.

 A known method (DR-V) for flashing and reducing surfaces with an unstable mode of contact interaction of the rough surfaces of the workpiece and the working elements of the tool due to the irregularity of the microrelief of the working surfaces of the tool.

 The specified method is characterized by low quality processing and durability of the working elements of the tool.

The closest in technical essence is the method (DR-V) for flashing and reducing cylindrical surfaces by uniform hydrodynamic throttling of a technological lubricating-cooling technological medium (SOTS) through the contact zone of the rough surfaces of the workpiece and the working elements of the processing tool [2]
Due to the irregularity of the microrelief of the contact surfaces of the working elements of the tool and the absence of throttling (COTS) through the contact zone of the rough surfaces of the workpiece and the mounting elements of the base device, this method is characterized by low dimensional and geometric accuracy, quality and parameters of the physicomechanical state of the surface layer of the workpiece, and also requires more high power costs and tool consumption.

 The objective of the invention is to improve the quality of processing and tool life.

 This problem is solved due to the fact that in the method (D-R-V) of flashing and reducing surfaces by uniform hydrodynamic throttling of technological lubricant (SOTS) through the contact zones, a regular microrelief (PMR) and a device for implementing the method are used to stabilize the uniformity of the throttling mode D-R-B) reduction of external surfaces, containing a base element, a holder with dies and a cavity for the placement of technological lubricant (COTS) and a stabilizer of uniformity of the throttle mode elite.

 The stabilizer of uniformity of the throttling mode is made in the form of a regular microrelief (PMR) of the contact surfaces of the dies and the contact surfaces of the blank-based element. An ejector is located in the lower part of the holder to remove the processed workpiece.

 A device for implementing the method (DR-V) for flashing internal surfaces contains a base element, inside which there is a cavity for accommodating technological lubricant (COTS), firmware and a stabilizer for uniformity of the throttling mode. The stabilizer of uniformity of the throttling mode is made in the form of РМР on the contact surfaces of the base element and the working elements of the firmware, and the fixing element is made in the form of covering clips with a conical surface.

 Figure 1 shows a device for implementing the method (DR-B) for reducing the outer surfaces of parts of the type "Hollow cylinders". Figure 2 shows the device of the basing element when processing the outer surfaces of parts such as "Shafts". In FIG. 3 shows a device for implementing the method (D-R-V) of flashing internal surfaces.

 A device for implementing the method (DR-V) of reducing the outer surfaces of parts of the class of "hollow cylinders" (Fig. 1) consists of a hydraulic press (not shown), a holder 1 with a cavity 2 for accommodating technological lubricant (COTS), working die elements 3 and 4, of the cover 5, of the base element 6, on the supporting end of which a regular microrelief is made 7. The ejector 8, the plunger 9, the sealing devices 10 and 11 are located in the lower holder. The hydraulic cylinder for moving the ejector (not shown) works simultaneously with the hydraulic press.

 The device operates as follows. In the initial state, the ejector 8 is in the upper position. The workpiece 12 by means of a manipulator (not shown) is automatically installed with its hole on the base element 6 and fixed to it using ball clamps 13. The duty cycle includes pre-filling the cavity with process grease (COTS). During the working stroke of the hydraulic press with the basing element and the workpiece 12, the working surfaces of the die 3 seal these cavities with the simultaneous creation of hydrodynamic pressure and throttling of COTS through the channels of the regular microrelief on the contact surfaces of the tool (die 3 and 4) and the supporting end 7 of the base element 6. in the contact zones "Harvest-firmware" and "Harvest-device", a more favorable and purely liquid friction regime is realized. At the extreme point of the working stroke, the base element 6 is automatically stopped and moved backward 6 with the workpiece 12 and the ejector 8 upwards to further remove the processed workpiece by the manipulator and then set the next one. As a result of this, a more favorable purely liquid friction regime is realized, which increases the tool life, improves the workability of the workpiece, and also improves the quality of the processed surface and completely eliminates adhesion.

 The base and fixing of the workpiece 14 (Fig. 2) of the "shaft" class is carried out using the base element 15 with the floating center 16 and the ejector 17 with the floating center 16. The method (D-R-B) for reducing the workpiece of this class is similar to the previous one.

 A device for implementing the method (DR-V) for flashing internal surfaces (Fig. 3) includes a base element 18 with a mounting surface 19, a fastening element (covering clips) 20, firmware 21 with a regular micro-relief applied and blanks. A cavity 22 is made in the body of the base element 18 to accommodate the supply of lubricating-cooling technological medium (COTS). Radial and vertical channels 23 and 24, the cavity 22 communicates with the installation plane 19 with a regular microrelief.

 The device operates as follows. At the beginning of the working cycle, the workpiece 25 is automatically installed with the supporting-output end on the surface 19, securing it and pressing the female clip 20. After basing, the working stroke begins. During the working progress of the firmware 21, the smoothing ribbons of its working elements seal the indicated cavities with the simultaneous creation of hydrodynamic pressure in them and subsequent throttling of the COTS along the channels of the regular microrelief on the contact surfaces of the working elements of the firmware 21 and the mounting surface 19 of the base element 18. As a result, in the contact zones blank-firmware "," blank-adaptation "a more favorable regime of purely fluid boundary friction is implemented, which increases the resistance to ments, which increases the quality of the surface layer and the hole geometrical accuracy deviation longitudinal sectional profile, which improves machinability of the workpiece material, and the roughness parameters of its physical and mechanical condition. The latter circumstance is explained by a deliberate increase in the rigidity of the input end face of the workpiece and a decrease in the reactive friction forces, and consequently, radial stiffness at its supporting-output end, as well as a significant decrease in the probability of adhesion on the working elements of the firmware. The working stroke ends with the release of the firmware during its reverse stroke, unfastening and removal of the processed workpiece by means of a manipulator (not shown) for the subsequent installation of another. YYY2

Claims (3)

 1. The method of deforming-cutting-smoothing flashing-reduction of surfaces by hydrodynamic throttling of a lubricant-cooling technological medium through the contact zones of the tool and the treated surface, characterized in that the hydrodynamic throttling mode is stabilized, while the regular microrelief of the contacted with the processed is used as a stabilizer of the throttling mode tool surface.  2. Device for deforming-cutting-smoothing flashing-reduction of surfaces, comprising a holder with a cavity for a lubricating-cooling technological medium, a forming tool placed in the holder and mounted on the base element with the possibility of reciprocating movement relative to the holder, characterized in that the forming tool is provided stabilization elements of the uniformity of the throttling mode of technological lubricant in the form of a regular microrelief on its working surface.  3. The device according to claim 2, characterized in that it is equipped with additional elements for stabilizing the uniformity of the throttling mode of the process lubricant in the form of a regular microrelief on the surfaces of the base element in contact with the workpiece.

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