SU1263539A1 - Screw press - Google Patents

Abstract

The invention relates to the field of mechanical engineering, namely to the design of screw presses. The purpose of the invention is to increase reliability and expand technological capabilities by increasing the range of workpieces being processed. The press contains a slider mounted by s guide beds, connected by means of a nut with a screw placed in the supports of the bed, a drive flywheel with a controlled friction clutch, and pneumatic cylinders fixed on the frame with brushes connected with the slide. The press is equipped with an additional flywheel, spring-loaded relative to the main flywheel, with stops and pushers and a knee mechanism installed in the main flywheel. When the additional flywheel is moved relative to the main one during the working stroke, the pushers act i on the knee mechanism of the friction clutch and turn it off when overloaded (L press. 3 Cp f-ly, 10 ill.

Description

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The invention relates to mechanical engineering, in particular to the construction of screw presses.

The purpose of the invention is to increase the reliability and expand the technological capabilities by increasing the range of workpieces being processed.

Figure 1 shows the press, a general view, a partial section; in Fig.2, view A in Fig.1; figure 3 - node I in Fig .; figure 4 - the position of the knee mechanism with the clutch; figure 5 is the same, when the coupling is disconnected in figure 6 - view B in figure 3; Fig.7 section bb In fig.Z; on Fig - section GG in figure 4; figure 9 - section dD in Fig, 3, when the delay mechanism is on; in fig. 10 - the same, with the delay mechanism disabled.

The screw press contains a frame 1, in the guides 2 of which a slider 3 is installed, in which the press holder 4 is installed with a nut 5, which is mated with a screw 6, which is movably mounted in a bolster 7 and the bearing 8 of the bed 1. The upper part of the screw 6 is connected by a spline sleeve 9 with follower I rsha 10 clutch. On the support 11 mounted on the press frame 1, a flywheel 13 is mounted on the bearings 12, which is connected with the electric motor 16 via the wedge gear 14 and the pulley 15 to the flywheel 13 by a splined connection connected to the drive plate 17 of the coupling. The clutch is controlled from the pneumatic cylinder 18 by the piston 19. On the driving disk 17 and the flywheel 13 there are fixed friction

lining 20 and 21.

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Air is supplied and discharged into the pneumatic cylinder 18 through the inlet sleeve 22 and the pipelines 23. To lift the piston 19, the springs 24 are mounted on the pneumatic cylinder 18, which are connected to the piston 19 by the studs 25 at the same time as the extreme lower position of the piston 19. The limiter of the uppermost position of the drive disk 17 are the stops 26, spring-loaded rubber 27. In the case of the pneumatic compression chamber 18 coaxially with the screw 6 and the flywheel 13, an additional flywheel 28 is installed with the possibility of rotation relative to the case pneumatic motsshidra 18. On the additional flywheel 28 are fixed zgpory 29, and the additional flywheel 28 is spring loaded by springs 30, under the action of which the stops 29 are pressed against the stops 31 fixed on the flange 32 mounted with the ability to adjust the angle of its rotation on the body of the pneumatic cylinder 18. The additional flywheel 28 with ratchet wheel 33 and through shaft 34 and washer 35 with pushers 36. On pneumatic cylinder body 18, pneumatic cylinder 37 is mounted, the piston of which is spring-loaded 38, and rod 39 is connected by an earring 40, with dog 41, spring-loaded spring 42 and with an earring 43, the other end of which is mounted on an axis 44 rigidly connected to the pneumatic cylinder 18. The piston 19 and the driving disk 17 are interconnected by a knee mechanism, the upper knee 45 of which is connected through a hinge 46 to the piston 19, and lower knee 47 through hinge 48 is connected with drive disc 17. The knee mechanism has a central hinge. Containing pin 49 and stops 50 in contact with pushrods 36. Lower knees 47 are spring-loaded with springs 51 and are equipped with angle-stop 52.

The slider 3 is provided with brackets 53 which are associated with the rods 54 and the pistons 55 of the cylinders 56 mounted on the base 1 of the press. To limit the extreme upper position of the slide 3, the ynoifti 57 is installed on the base 1 of the press.

The die holder 4 has a brake 58 mounted on a slider, for example, a shoe design with any known control system.

The press works as follows.

In the initial position, the slider 3 is in its extreme upper position and held by the cylinder 56, the T9 brake 58 is inhibited, the pneumatic cylinder 18 of the coupling is connected to the atmosphere and the coupling is open, the electric motor 16 is turned on and rotates the flywheel 13. Together with the flywheel 13, the flywheel 28 rotates at the same angular speed and the flywheel 28 .

Claims (4)

To make a downward stroke in pneumatic. The cylinder 18 is supplied with a pressure, under the action of pressure of which the piston 19 is lowered and lowered through the upper elbow 45 and lower elbow 47 the driving disk 17 and the driven disk 10 until the friction lining 20 and 21 are closed. The clutch is turned on, and under the action of its torque the screw 6 acceleration Up to the speed of rotation of the flywheel 13, the nut 5 is screwed in and the spruce 4 and the slider 3 are pulled down by the stem 14p. Progressing downward occurs. At this point, the flywheel 13, the screw 6 and the additional flywheel 28 rotate at the same angular velocity. When a working tool encounters a workpiece (not shown), the course of deformation begins. During the deformation stroke, the kinetic energy of the flywheel 13 goes into the work of deforming the workpiece and the rotation speed of the flywheel 13 and the screw 6 connected to it through the clutch decreases, and the rotational speed of the additional flywheel 28 decreases slightly, since the energy of the additional flywheel is spent only on friction during its rotation and deformation of the spring 30. Thus, the relative movement of the flywheel 13 and the additional flywheel 28 and the rotation of the catchers 36 occurs. When turning the pushers 36 through the angle vp, they enter contact with the stops 50 of the knee mechanism and rotate the upper knee 45, lower knee 47 and, raise the driving disc 17. At the same time, the piston 19 is lowered down to the full sampling of the gap 5 by an amount (5g and the clutch is turned off, and the rotation speed is additionally reduced 28 up to the speed of rotation of the flywheel 13. The flywheel 13 is disconnected from the screw 6. The energy of the screw 6 is expended on completing the deformation stroke and on the elastic deformation of the press-stamp system. After the deformation stroke is completed, the slider and the die holder 4 by the cylinders 56 are raised to the initial upper position, and the flywheel 13 accelerates to a predetermined angular velocity. When the slide 3 and the die holder 4 move upward, the pneumatic cylinder 18 is connected to the atmosphere and the piston 19 is raised to the extreme upper position by the springs 24. The additional flywheel 28 under the action of the spring 30 returns to its original position before the closing of the stops 29 with the stops 31. The press is ready for the next turn. The press has a mechanism for delaying the return stroke of the additional flywheel 28, which provides the height of the additional flywheel 28 in the extreme position after the operation of the knee mechanism. Such a delay is necessary to keep the drive disk 17 in the upper position. The delay is provided by the locking position of the ratchet wheel 33 by the pawl 41. In releasing the ratchet wheel 33, the piston cavity of the pneumatic cylinder 37 is connected to the atmosphere and under the action of the springs 38 the pawl 41 is retracted from the ratchet wheel 33. After that, the additional flywheel 28 returns to its original position. The regulation of the energy that the flywheel 13 can transfer to the deformation of the workpiece is carried out by changing the angle θ of rotation of the tappets 36 from the moment the workpiece begins to deform until the coupling is turned off. The angle is determined by the position of the lugs 31 by rotating the flange 32 relative to the body of the pneumatic cylinder 18. When the invention is implemented, the reliability and technological capabilities are increased by increasing the range of workpieces being processed. Claim 1. Screw press containing a slider mounted in bed guides connected by means of a nut to a screw placed in the bed supports mounted on bearings on a frame driven flywheel with a controlled friction clutch in the form of leading friction discs connected to a flywheel and a piston couplings, and driven friction discs associated with the screw, as well as pneumatic cylinders fixed to the frame with rods connected to the slide, are distinguished by. so that, in order to increase reliability and expand technological capabilities by increasing the range of sizes of machined blanks, it is equipped with an additional flywheel with an emphasis and pushers installed coaxially on the flywheel spring-loaded relative to the latter with a stop and pusher mechanism and a knee mechanism; piston, and the other - with the lead claim, on the main flywheel performed-. s stops, additional flywheel mounted with the ability to interact with their stops with the flywheel stops, and the pushers with the central hinges of the knee mechanism. 2.Press pop. 1, distinguished by the fact that it is equipped with a die holder mounted in a slider. 3.Press according to claim 1, about tl and h and y and with the fact that the flywheel stops mounted on it with the ability to move around a circle. 4. Press according to claim 1, distinguishing. and with the fact that it is equipped with a ratchet mechanism with a pneumatic cylinder of its drive, while the ratchet pawl is pivotally mounted on the main flywheel, and the ratchet wheel is connected with an additional flywheel. T7 X view A Fiz.g "Tf 52 48 17 fie. / 7 cpus.S in id 6 fi8.6 36