SU956299A1 - Screw press - Google Patents

Description

The invention relates to the field of engineering, in particular to the design of equipment for pressure treatment.

A screw press is known that contains an outer slider with a nut installed in the bed guides, in the cavity of which an internal with a nut is placed, the latter being connected by thread with a stepped screw articulated through a sub screw with a driving screw, at the end of which the flywheel is rigidly fixed, while the drive screw of the thread is articulated with a nut fixed in the crossbar of the bed of the press 1.

A disadvantage of the known screw press is the narrowed technological capabilities due to the impossibility of machining forgings of complex configuration with lateral cavities.

in order to eliminate this drawback, a screw press containing a frame-mounted press

an outer slider with a nut, in the cavity of which an internal slider with a nut is placed, the latter being threaded with a stepped screw articulated with the nut of the outer slider and through a driving screw with a driving screw at the end of which the flywheel is rigidly fixed; with a nut fixed in the crossbar of the press section, an additional slide with a bolster and two wedges, two half hems with wedges mounted on the press table with the possibility of reciprocating displacement and borrowing from the wedges of the additional slider, and on the drive screw it is made in the form of a shoulder coupled to the subgun jg of the additional slider.

Claims (2)

FIG. 1 shows the proposed press section; in fig. 2 is a section A-A in FIG. 1. 9 The press contains a frame 1, in the guides of which an external slider 2 with a nut is located 3. In the internal cavity of the slider 2 there is an internal slider k with a nut 5, which is bolted to the lower cutting of the stepped screw 6, which is screwed with the upper cutting of the opposite direction with the nut 3 fixed in the outer slide 2. In the upper part, the screw 6 has a binder 7, through which it is connected with a water screw 8, screwed with a nut 9 that is not movably installed in the base 1. In the upper part of the screw 8, the flywheel 10 is rigidly fixed an additional slider 11, which is connected via the bolster 12 with the collar 13 of the drive screw 8. The press also has a working tool: the upper half-matrix H, lower, the half-matrix 15 punches 16-18, fixed respectively on the outer slider 2, the press table 19, the inner slider and sliders 20 and 21. Drive drives 20 and 21 are from wedges 22 and 23, mounted on an additional slider 11. The threads of the screws 6 and B are non-self-braking. The press works as follows. Under the action of the torque applied to the flywheel 10 and the screw 8, for example from hydraulic motors (not shown), the screw 8 and the flywheel 10 begin to make a downward spiral motion. The crawl "2, 4 and 11 are rapidly moving down at the same speed. The stepped screw 6 does not rotate at this moment, since the half of the ground 2 and t are interconnected by a braking device (of any known construction). When approaching the lower position of the half-matrix 1A and 15 with the thumb and the outer slider 2 stops. The drive screw 8 continues to move downward and transmits the force through the pin 7 to the step screw 6, which begins to be screwed into the nut 3 and performs a rotational and translational movement downwards. Since the stepped screw 6 is screwed with the nut 5 with threads of the opposite direction than with the nut 3, the slider i accelerates downwardly at a speed ",., U) w, h-, the stroke of the screw 8; h 0 - one bottom of the screw 6; h / j - move the upper part of the screw 6; . W is the angular velocity of the screw 8. The additional slider 11 moves downward at a speed equal to the speed of the sales movement of the rotary screw 8: When the wedges 22 and 23 are in contact with the sliders 20 and 21, the latter begin to move. Simultaneous deformation of the workpiece (not shown) by punches 16-18 occurs. The accumulated kinetic energy of the moving parts is transferred to the work of plastic deformation of the forging. During the course of deformation, the ratio between the deformation force PQ of the inner slider and the force of the PH of the outer slider remains constant l. At the end of the deformation run, the movable parts of the press are reversed, the drive screw 8 with the flywheel 10 and the outer 2 associated with them, the inner k and the additional 11 sliders occupy the initial upper position. The initial position is also occupied by the sliders 20 and 21, moving, respectively, to the most extreme position, for example, from wedges 22 and 23 or from springs or | 1 electric cylinders (not shown). The design of the press ensures reliable closure of the semi-matrix and deformation of the workpiece in two opposite planes with a predetermined force from a single screw mechanism, while maintaining the advantages of screw presses, which facilitates setting up the press, eliminates the possibility of jamming the sliders, a slight contact time of the forging with the tool, which improves conditions of operation of the press and tooling when stamped in closed stamps with separable dies; the rigid connection between the movement of the inner and additional sliders during the course of deformation ensures the obtaining of specified dimensions and configuration of the forging. The efficiency of use of the screw press is provided by the expansion of technological capabilities by ensuring the processing of complex forgings with side cavities. Claims of the Invention A screw press containing an outer slider with a nut installed in the guide beds, in the cavity of which an internal slider with a nut connected by means of a threaded connection with a stepped screw connected to the outer slider nut via a sub screw with a driving screw at the end the flywheel is rigidly fixed, and the drive screw is connected with a nut fixed in the crossbar of the press bed; with the fact that, with 9 9 -4 the purpose of expanding technological capabilities by obtaining side cavities on the forgings, it is equipped with an additional slide with a binder and two wedges, two sliders with wedges mounted on the press table with the possibility of returning -accessible movement and interaction with the wedges of the additional slider, and on the drive screw it is made fifth in the form of a collar coupled with the liner of the additional slider. . . Sources of information taken into account in the examination of V. USSR author's certificate for application tf 296898V27, cl. B 03 B 1/18, 05. (prototype) r. / / f- / f