Device for forming by forging

 

(57) Abstract:

The invention relates to the processing of metals by pressure, namely, devices for punching blanks tool performing a complicated oscillatory motion. The device includes upper instrumentalization and its mechanism of oscillations made in the form of two drive shafts arranged one inside the other. The inner sleeve is connected with the shaft of the first engine intermediate and the outer sleeve is made with a ring gear connected gear with the shaft of the second motor. The inner sleeve is provided with a ring gear, and its axis is located on the bisector of the angle of inclination of the axis of instrumentalities, the intermediate element is a gear with internal and external and a ring gear, inner crown is connected with a ring gear inner sleeve and the outer crown of the intermediate gear with a ring gear of the outer sleeve. The mechanism for the transfer of axial forces is made in the form of spherical washers placed on the shank instrumentalities and in contact with mating spherical surface of the upper support, placed in the annular bore of the liner covering the bottom support, and the centers of the radii of the sphere of the upper and lower orayta for stamping blanks tool performing a complicated oscillatory motion.

A device for forming by forging, containing a frame made in the form of tied columns of the upper and lower plates, the lower instrumentalization and placed on top traverse sporadicly mechanism made in the form of upper instrumentalities with a spherical bearing surface and a shank mounted in the sleeve and connected by intermediate links with the motor shafts (ed.St. USSR N 517514, class B 30 B 15/00, 1974).

A disadvantage of the known device is its limited technological capabilities, because the device is designed to implement only one type of movement of the tool, namely in the field. In addition, in the known device, you cannot change the angle of the axis of the upper instrumentalities.

This fact significantly reduces the range of stamping parts false relief, for example, gears, sprockets and other parts of arbitrary shape in plan.

Another disadvantage is the lack of reliability in operation, due to the fact that it is not provided with a device for unloading from the axial forces of the upper instrumentalities in nakazyvaet axial force, acting on the thrust bearings. In addition, with this design it is almost impossible to ensure locking of the oil in the lower support roller, resulting in its rapid deterioration.

The closest in technical essence and the achieved effect is a device that contains a frame, upper instrumentalization and its mechanism of oscillations made in the form of the two drive shafts located one inside the other and connected by intermediate links of the shafts, respectively, first and second motors [1]

A disadvantage of this device is that it cannot be used with universal equipment, which increases the capital cost of the project.

In addition, as in the known device the transmission of torque to the inner sleeve through keyway, limited capacity and decreases the reliability of the device operation, which in turn narrows the range of stamping parts up to a diameter of 200-250 mm

The objective of the invention enhancing the technical capacity, improving reliability.

This object is achieved in that the inner sleeve is provided with subguideline in the form of a gear with internal and external and a ring gear, the inner crown is connected with a ring gear inner sleeve and the outer crown by means of an intermediate gear with a ring gear of the outer sleeve; the mechanism of transmission of axial forces is made in the form of spherical washers placed on the shank instrumentalities and in contact with mating spherical surface of the upper support, placed in the annular bore of the liner covering the bottom support, and the centers of the radii of the sphere top and gentle poles coincide.

In Fig. 1 shows a kinematic diagram of the proposed device; Fig.2 the design of the mechanism of the oscillations of the upper instrumentalities; Fig. 3 is a view along arrow a in Fig. 1.

Device for punching the testing consists of a casing 1 in which are bearings 2 5 one inside the other sleeve 6, 7. The sleeve 6 is provided with a ring gear 8 and is connected with the gear 9. The axis of the sleeve 6 is displaced (see Fig. 2) about a vertical axis at the point "O" at a distance "e" and is located on the bisector of the angle of inclination of the axis of instrumentalities 10, located in the eccentric bore of the sleeve 6. The gear 9 is connected with the axle 11, which is located on the bearings 12, 13, through an electromagnetic clutch 14 with the shaft 15 of the first motor 16.

The sleeve 7 is in turn connected to the gear 21 connected through the axes 22 and pulley 23 on the shaft of motor 24. On the top instrumentalization 10 posted by spherical washer 25 are clamped to the upper leg 26 and nuts 27. The upper bearing 26 is made with the sphere radius R, which coincides with the center O of the sphere with radius r of the lower support 28. In the cavity of the frame 29 posted by composite liner 30, covering the bottom support 28. In the support 28 is made annular cavity 31 for supplying oil under pressure. The cavity 31 is sealed by the plate 32 and seals 33, 34, 34. For adjusting the position of the upper support 26 that is defined by the radius R between the upper leg 26 and sleeve 30, posted by distance rings 36, 37.

To the upper instrumentalization 10 secures the punch 38. The mobile traverse device 39 is attached matrix 40 in the cavity where the workpiece 41 and the piston 42. Between the sleeve 30 and the movable head plate 39 posted by guiding rolling pin 43.

The device operates as follows.

The workpiece 41 is installed in the cavity of the matrix 40. Include rotation drive motor 16. When the button is pressed, the rotation of the gear 9 through kinematically associated ring gear 8 WTO. After that include drive motors 24 and simultaneously sends a signal to the electromagnetic clutch 19. At the same time turn pumps the flow of oil into the cavity 31 of the lower support 28.

The rotation of the motor 24 constant current is passed through the pulleys 23 V-belt gear on the shaft 22 and located on her gear 21. Since the gear 21 is kinematically connected with a ring gear 7, rotating the latter at a given speed. Simultaneously with the engine 16 through the axis 15 is provided by the rotation of the gear 9 and the associated through the crown 8 of the sleeve 6. In this case, when off the electromagnetic clutch 19 of the gear 17 and 20 associated with the bushings 6,7, perform passive rotation.

When the rotation of the bushings with different angular velocity provides the specified type of fluctuations instrumentalities 10 and secured on the plunger 38.

Under the action of the oil pressure supplied into the cavity 31 of a support 28, there are axial forces acting on instrumentalization 10 in the direction of the matrix 40.

Under the action of axial forces spherical washer 25 is pressed against the upper support surface 26, providing compression of the oil in the cavity 31 and the hydrostatic system mode "bearing 28 intercentrum the sphere of the radius r of the lower support 28, to prevent premature leakage of oil from the space above the lower support 28 and is provided with a compression in the process of spinning. This allows you to unload the bearings 3, 4 and thereby to improve the reliability and efficiency of the device.

When moving in the direction of the punch 38 movable beam 39 carry out the shaping of the workpiece 41. Due to the fact that the yoke 39 is moved along the guide rails rolling pin 43 deformation is carried out without tilting and displacement of the tool in the radial direction. At the end of deformation of the yoke 39 is directed to a lower position; an ejector 42 of the workpiece 41 presoviet of the matrix 40.

The cycle ends.

For stamping duplicate parts, such as flanges, requiring one type of oscillations of the tool, the device can operate under the simplified scheme. In this case, after the withdrawal of the axis of instrumentalities at a given angle "gamma" engine 16 is turned off. The motors 24 simultaneous rotation in the same direction of the sleeves 6 and 7. Gear 9, 17, 20 thus provide passive rotation. In such cases, rotation of the sleeves 6, 7 is the simplest type of oscillations instrumenty angles of inclination of the tool for different speed fluctuations instrumentalities, that allows you to expand the technological capabilities of the device during the molding of parts of different sizes.

The proposed device can be installed on a commercially available hydraulic presses with sufficient rigidity of the frame and the size of working space, such as presses for the extrusion of relief stamps.

Compared with the known devices, this can significantly reduce capital costs and reduce production time.

1. Device for forming by forging, a top instrumentalization and its mechanism of oscillations made in the form of the two drive shafts located one inside the other, with the inner sleeve is connected with the shaft of the first engine intermediate and the outer sleeve is made with a ring gear connected gear with the shaft of the second motor, and the transmission mechanism of axial force, characterized in that the inner sleeve is provided with a ring gear, and its axis is located on the bisector of the angle of inclination of the axis of instrumentalities, the intermediate element is a gear with internal and external gear ring the inner crown is connected with a ring gear of the internal wtoo under item 1, characterized in that the transmission mechanism of axial force made in the form of spherical washers placed on the shank instrumentalities and in contact with mating spherical surface of the upper support, placed in the annular bore of the liner covering the bottom support.

3. The device under item 1, characterized in that the centers of the radii of the sphere of the upper and lower supports are the same.

 

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