Apparatus for upsetting blank at shearing it

FIELD: plastic working of metals, possibly realization of blank working operations designed for developing high technology of thermo-mechanical working.

SUBSTANCE: apparatus includes housing where lower stop and both movable relative to housing punch and upper stop are arranged. Said stops have notched surfaces for engaging with blank and their ends are in contact respectively with punch and supporting plate. Stops may move relative to punch and supporting plate in mutually opposite directions normal relative to axis of housing. Apparatus is also provided with two wedges. Housing may move relative to supporting plate and it includes two annular grooves arranged in upper and lower parts of housing and designed for placing said wedges. Upper and lower stops form with wedges wedge pairs.

EFFECT: simplified design of apparatus, increased efforts applied to blank.

1 dwg

 

The invention relates to the field of metal forming and can be used in mechanical engineering, aircraft construction, shipbuilding and other industries for the plastic shaping of blanks required, for example, in the development of high technology mechanochemical processing.

It is known device [1] for precipitation with a shift of the workpiece containing the support plate and the housing in which are located the lower stop and having the ability to move relative to the body punch and the upper limit, these upper and lower supports have surface grooves for contact with the workpiece and is installed in contact with their end faces, respectively, with the punch and the support plate and can move them relatively in opposite directions perpendicular to the body axis.

The disadvantage of this device is the complexity of its design, due to the presence of two lateral columns with inclined grooves and mounted in the lugs finger that does not allow you to make great efforts to the workpiece due to insufficient strength of these fingers.

The invention is aimed at simplifying the structure of the device, which will ensure greater effort to harvest.

This is achieved in that the device is equipped with two wedges, the case is installed with the possibility of the movement relative to the base plate and is made with two located in the upper and lower parts of the annular grooves, in which the said wedges, and top and bottom stops are made with the formation with the corresponding wedge wedge pair.

The drawing shows the design of the device.

The unit contains the following main elements. A cylindrical housing 1 is made in upper and lower parts of the two annular grooves, mounted on the mobile landing on the base plate 2. Inside the case on the mobile landing cylindrical punch 3 and the top is made in the form of a wedge stop 4, and the bottom of the same form focus 5 installed on a smooth surface on the base plate 2 can move it. In the annular grooves of the housing 1 a of the upper 6 and lower 7 wedges for education with the upper 4 and lower 5 stops of wedge pairs with angle α.

In order to reduce friction between the touching ends of the upper limit, respectively, with the punch 3 and the support plate 2 is the anti-friction layer of a thickness of ˜50 μm. For processing through the corresponding hole (not shown in figure 1) set between the lugs 4 and 5 on flat surfaces with notches of the workpiece 8.

The device after Assembly together with the workpiece placed on the working plate press 9 and make processing of the workpiece.

It works as follows. When the application of force P to the punch last 3 moves down, deformi is the duty to regulate the workpiece 8. In this case, due to the presence of wedge pairs of upper lugs will be moved in the housing 1 at the same time towards each other due to the coupling of the housing 1 with the support plate 2 by the mobile-boarding and in opposite directions perpendicular to the body axis.

Thus, the workpiece 8 is subjected to a compression force P and the shear force T due to the notches on contact with the workpiece and the ends of the lugs 4 and 5. Changing the angle αreceive a different ratio between shear deformation and compression deformation in the workpiece being machined 8. When α=0 the latter will be subjected to only compressive force P. In this case, due to the presence of a flat V-pairs can make a huge effort to the workpiece to deform the latter to large degrees of deformation.

After the processing of the workpiece to the desired degree of deformation applied to the punch 3, the load is relieved. Under the influence of a spring installed between the wall of the housing and the lugs 4 and 5 (in the figure they are not shown) and V pairs of the punch 3, the housing and the upper stop will go up relative to the lower extreme position with the workpiece 8 and the support plate, returning them to their original position. Under the forces of compression of these springs all the elements of the device will be fixed in a stable condition.

The claimed device is istwo in structurally more simple in comparison with the prototype and convenient in operation and thus can be effectively used in the development of high technologies in the processing of metals by pressure.

Sources of information

1. RF patent №2134414. G01 No. 3/08 from 10.08.99. Bull. No. 22.

Device for precipitation with a shift of the workpiece containing the support plate and the housing in which are located the lower stop and having the ability to move relative to the body punch and the upper limit, these upper and lower supports have surface grooves for contact with the workpiece and is installed in contact with their ends respectively with the punch and the support plate and can move them relatively in opposite directions perpendicular to the axis of the housing, characterized in that it has two wedges, the housing is mounted for movement relative to the support plate and is made with two located in the upper and lower parts of the annular grooves, in which the said wedges, and top and bottom stops are made with the formation with the corresponding wedge wedge pair.



 

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