SU1675010A1 - Device for drawing in hydrodynamic friction mode - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to a drawing tool, and can be used in hardware manufacturing in the manufacture of wire. The purpose of the invention is to increase operational durability by providing stabilization of the hydrodynamic friction mode in the steady state, as well as by providing external back pressure from the high pressure lubricant both in the steady state and during the process stop. The device comprises a housing 1, working dies 2 and 3 mounted in a bore of the housing with a radial clearance, separated by a spacer washer 4 with radial channels communicated with a radial clearance, fixed in the front of the housing with an axial egor relative to the first along the drag; portages 2 pressure element 5 and mounted between the bottom of the bore of the housing and the rear wall of the second working fibers 3 and in the axial clearance of the pressure element a and the first working die 2, respectively, syn / latency elements 6 and 7. 1 sludge. fe o vl hl oa o

Description

The invention relates to the processing of metals by pressure, in particular to a drawing tool, and can be used in hardware manufacturing in the manufacture of wire.

The purpose of the invention is to increase the operational durability of the working fibers by providing stabilization of the hydrodynamic friction mode in the steady state, as well as by providing external back pressure to the fiber with high pressure lubricant both in the steady state and during the process stop.

The drawing shows the device, a General view in section.

The device comprises a housing 1 with an internal bore, working dies 2 and 3 installed in a bore with a radial clearance, separated by a spacer 4 with radial channels communicated with a radial clearance, fixed in front of the housing with an axial clearance relative to the first dragging dies 2 the pressure element 5 and the casing bore between the bottom and the rear end wall of the second working die 3 and in the axial gap between the pressure element and the first working roll 2 are respectively sealed elements 6 and 7.

The device for dragging in the hydrodynamic friction mode operates as follows.

A sharpened end of the wire blank 8 is passed through the device, and the tongs are pulled onto the drum of the drawing machine. In the process of filling the route, the working cavities of the tool are filled with lubricant carried by the moving wire, after which the wire is drawn using the device. When drawing, the lubricant under pressure created by the pressure element 5 is supplied to the deformation zone of the working die 2, then to the lubrication chamber between the holes 2 and 3, to the high-pressure cavity formed in the radial clearance between the housing bore and the grooves, and to the deformation zone of the working die 3, at the same time, the section between the rubble surfaces of the workpiece and the working fibers and the creation of external backing of the working fibers. High hydrostatic pressure in the lubrication chamber and high pressure cavity is maintained throughout the entire wire production process (both when drawing and stopping the drawing equipment), thereby reducing the fatigue damage of the working fibers by improving their stress state.

Example. The device is used when

drawing wire from Sv-08 steel with a diameter of 5.0 mm to a diameter of 4.0 mm at a speed of 1.2 m / s. Soap powder is used as a process lubricant. The pressure element and working dies are made of VK6 alloy (Form II according to GOST). A pressure element is a worn portage with a diameter of 5.18 mm calibrating the speed. The diameters of consecutive working fibers are 4.30 and 4.00

mm, while the relative reduction in the working decks is 26.0 and 13.5%. The use of the proposed device will increase the resistance 1.4 times compared with the known.

The use of the proposed device in comparison with the known one will allow to increase the operational durability by providing stabilization of the hydrodynamic friction mode in the steady state.

mode, as well as providing external support for the fiber with a high-pressure grease, both in the steady state and at the time of technological shutdown, when the workpiece is being processed,

dies continues to exert pressure on the dies (elastic consequence), resulting in tensile radial and circumferential stresses in the dies, which are compensated by compressive stresses when the external back-up is lubricated by high-pressure lubricant.

Claims (1)

The invention The device for dragging in the mode of hydrodynamic friction, comprising a housing with an internal bore, two working dies placed in the bores of the casing with a radial clearance, a sealing element installed between the bottom of the bore and the rear end wall of the second along the drawing of the working drawing and fixed in the front of the housing with an axial clearance relative to the first along the drawing of the drawing drawing, a pressure element, characterized in that, in order to increase the operational durability of the working fibers by ensuring stabilization of the hydrodynamic friction mode in a steady state, as well as by providing an external backwater fiber with a high pressure lubricant both in the steady state and during the technological shutdown period, it is provided with an additional pack otnitel- nym epementom mounted in the axial gap between the pressure element and per516750106 with a radial clearance between the bore between the workpieces of the remote casing and the outer surfaces of the washer with radial channels,