RU2496644C1 - Hydraulic powder compacting press - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming, particularly, to compaction of powder by upsetting with twisting. Proposed press comprises bed with crossbars with hydraulic cylinder secured in one of them. Cylinder piston is engaged with slider fitted in bed guides. Shaft with die holder secured at its one end is fitted at the bed other crossbar. Said shaft runs alternately in opposite directions, being driven by two-arm rocker. Rocker arms are engaged via con-rods with crankshaft cams. Said shafts are arranged in symmetry about two-arm rocker and are drive by motor via appropriate gearing.

EFFECT: higher quality of compaction, lower process loads.

1 dwg

Description

The invention relates to the processing of metals by pressure, in particular to hydraulic presses, and can be used for stamping axisymmetric forgings by upset torsion.

A device (rocking machine for pumping oil from a well) containing a rocker swinging relative to a fixed axis, forming a crank-rocker mechanism with a connecting rod and a rotating crank, as well as a crank rotation drive including an electric motor and gearbox [1].

Its disadvantage is the inability to perform stamping with torsion.

A hydraulic press is known for stamping by upsetting with torsion of axisymmetric forgings, containing a bed, in the guides of which a slider is mounted, which receives translational movement by means of a piston of a hydraulic cylinder located in the cross-section of the bed, and a die holder is rotatably mounted in the other cross-section of the bed, which is driven from hydraulic motors by means of gear transmission [2]. This device in its essence and the achieved effect is the closest to the proposed invention and therefore is taken as a prototype.

The main disadvantage of the known hydraulic press for stamping by upsetting with torsion is that during the stamping process, the die holder rotates in one direction, therefore, torsion also occurs in one direction. It is not possible on this press to upset the workpiece with torsion in different directions, which can be accomplished by rotating the die holder alternately in one or the other direction. Such kinematics of the working body of the press makes it possible to reduce the work of deformation and technological force, as well as increase the density when compacting powder materials.

The basis of the invention is the task of improving the quality of compaction of products from powder materials by increasing their density, as well as reducing the work of deformation and technological force during stamping by draft with torsion.

The problem is solved in that the hydraulic press for compaction of powder materials contains a bed with cross members, in one of which a hydraulic cylinder is fixed, the piston of which is connected to a slide installed in the guide rails of the bed, a die holder mounted on one end of the shaft installed in the other cross beam the possibility of alternating rotation in different directions by means of a two-arm rocker mounted on the other end of the shaft, the shoulders of which are connected by means of connecting rods to the entrikami crank shafts arranged symmetrically to the axis dvuplechnogo rocker to be actuated in motion by a motor through gears.

The invention is illustrated by the following drawing:

figure 1 - design of a hydraulic press in two projections.

The device comprises a bed consisting of an upper 1 and a lower 2 cross, connected by uprights 3, 4. In the guides 5 of the frame, a slider 6 is mounted, connected to the piston 7 of the hydraulic cylinder 8 installed in the lower cross member 2 of the bed. A shaft 9 is rotatably mounted in the upper cross member 1 of the bed, the die holder 10 is fixed at its lower end, and the two-arm rocker 11 is mounted at the upper end. Each shoulder of the two-arm rocker 11 is pivotally connected to the connecting rods 12, 13, which connect the two-arm rocker 11 with crank shafts 14, 15. The latter are driven by an electric motor 16, the output shafts of which are connected to the worms 17, 18, forming worm gears with worm wheels 19, 20, mounted on the crank shafts 14, 15.

The device operates as follows. The workpiece is placed on the lower stamp mounted on the slider 6 of the press. The press drive (not shown in the drawing) feeds the working fluid into the hydraulic cylinder 8, as a result of which the piston 7 and the slider 6 receive translational motion. When the upper stamp mounted on the die holder 10 comes into contact with the workpiece, the latter begins to settle. For a given amount of draft, the die holder rotation drive is turned on: the electric motor 15 rotates the worms 16, 17, which rotate the worm wheels 18, 19 and the crank shafts 14, 15, connected by connecting rods 12, 13 to the two-arm rocker 11. Full rotation of the crank shafts causes the oscillating movement of the two-arm rocker 11 and the die holder 10 rigidly connected to it. Thus, the workpiece is deformed by draft (translational movement of the slider 6) and simultaneously torsion in different directions x (rotational motion of the shoe 10).

The technical result of the invention is the possibility of increasing the density of the workpiece from powder materials through the use of a press that performs stamping by draft with alternating torsion of the workpiece in one and the other. This type of compacting during stamping leads to both an increase in the quality of parts made from powder materials and a decrease in the technological force and the work of deformation.

Information sources

1. Krainev A.F. "Amazing mechanics." M .: "Mechanical Engineering", 2005, p. 58.

2. AC 1451049, MKI V30V 1/32, a hydraulic press for stamping with torsion (USSR) - stated 04.06.82, publ. 01/15/89.

Claims (1)

A hydraulic press for compacting powder materials, comprising a bed with cross members, a hydraulic cylinder fixed in one of them, the piston of which is connected to a slide installed in the guide rails of the bed, and a die holder, characterized in that the die holder is mounted on one end of a shaft mounted in the other cross member of the bed with the possibility of alternating rotation in different directions by means of a two-shouldered rocker arm mounted on the other end of the shaft, the shoulders of which are connected with the connecting rod via connecting rods with the cranks of the crankshafts located symmetrically relative to the axis of the two-shouldered rocker arm with the possibility of being driven from the electric motor by means of gears.