SU1215796A1 - Die bending hinges - Google Patents

Description

The invention relates to the processing of metals by pressure.

The purpose of the invention is to increase the productivity of labor, and the juice of the transitions are flexible and improve the quality of the parts produced.

FIG. 1 shows a stamp at the initial moment of bending; figure 2 - the same, at the final moment flexible; in fig. 3 shows a section A-A in FIG. on ||) IgT 4 - bending punch, cut along the axis of symmetry; in fig. 5 shows the section of the bending punch, the position of the bending rollers relative to the surface of the bent part and the position of the guide rollers relative to the guide surface B, as well as the development of the guide and bending rollers during the bending process.

A punch for bending loops consists of 2 tons of grades 3 mounted on a movable plate 1, a punch consisting of a stand 4, a chain of sets of guides 5 and bending 6 rollers, connected to each other by a link f, consisting of strips 7-9, sleeves 10, axles 1) and 12, mounted on the basis of a GB of the sleeve 14 with a guide groove and a cylindrical mandrel 15, an emphasis 16, a sidewall 17, a clamp 18, clad on the rod 3, spring-loaded springs 19.

The direction of the movable plate to the rail is restricted with the help of columns 20 and sleeve 21. Columns 20 are fitted with stops 22, of a closed height,

Structurally, the center of the cylindrical surface B of the yoke 14 and the sidewall 1 7, made along the radius K, is displaced from the center of the surface of the mandrel 15, made along the radius at height i, which allows pressing the workpiece along the mandrel at the end of the press slide and upwards, release the bending 6 and guide rollers 5 from contact with the part and the curved surface B of the yoke 14 and the sidewall 17 and freely return the punch to its original position.

The rollers 5 and b in the punch sets are made with increasing outer diameters from the end of the chain to the rack 4 so that at the end of the punch stroke the distance t between the centers of the mandrel 15 and the curved surface B is compensated and the part is crimped over the mandrel.

In the initial position of the stamp, when the press slider is at the top

the workpiece 23 is placed in a groove made horizontally in the holder on the mandrel 15 up to the stop 16. At the beginning of the slide movement down, the workpiece 23 is pressed by the pressure member 18 under the action of

0 springs 19 to the surface of the groove is about the Miii 14 and to the mandrel 15. The punch, having reached the first bending roller 6 - the workpiece and having started to bend it, takes a position in the cage 14 of the serpent 5 which is from left to right or right to left.

As the slider continues downward, the first guide roller 5 rolls along the direction of the surface B of the base 14 on the sidewall 17, and the first bending roller 6 rolls along the workpiece 23, round it around the mandrel 15, at the same time the subsequent guide 5 and the bending 6 The rollers, which are flexibly flexed, are guided by the guide rollers 5 along the ggrinear surfaces of the holder 14 and the sidewall 17 downwards.

The second set of guide rollers 5 and bending roller 6, having reached the bending roller 6 on the surface of the workpiece 23, also begins to roll along the workpiece and bend it around the mandrel 15, and the guide rollers 5 reach the surface B of the holder 14 at that time. and the sides 17. The same thing happens with all after-. .the sets of guides 5 and bending 6 rollers.

At the end of the press stroke, all the guide rollers 5 of the punch are in hard contact with the curved surface B of the yoke 14 and the sidewall 17, and all the bending rollers 6 of the punch at the same time compress a bent part of the mandrel 15.

When the slider reverses up all the bending 6 rollers and the rollers 5, rolling along the surface of the part and along the curvilinear surface B of the clip 14, are freed from rigid contact with the part and the guide surface B of the clip 14 and sidewall 17, the punch freely returns to its original position . At the end of the run 5 of the slider upwards, the gi 3, acting on the clamp 18, which, having overcome the force of the springs 19, rises up, the part released from the force at 5

0

five

0

the press is removed from the mandrel. The process is repeated.

The use of the proposed bending stamp in comparison with the known one allows to reduce the number of transitions that are flexible, which increases labor productivity; simplify the design compared with the design of the two dies, as well as improve the quality of the parts.

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Editor M.Blanar

Compiled by A. Guz Tehred M. Nad

931/9 Circulation 783 Subscription VNIIPI USSR State Committee

according to jenaM inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch pgat Patent, Uzhgorod, Proektna str., 4

Proofreader V. But ha

Claims (1)

A HINGE BEND STAMP containing a punch and a cylindrical mandrel, respectively placed on a movable plate and base, characterized in that, in order to increase productivity by reducing bending transitions and improve the quality of the products obtained, it is equipped with a clip with a guide groove , the surface of which is made of a flat section and a cylindrical, placed relative to the working surface of the mandrel with an eccentricity in the direction of the punch, and the punch is made in the form of a rigidly fixed th on the movable plate of the rack and pivotally connected to the rack of the chain, composed of a set of guides and bending rollers with diameters increasing from the end of the chain to the rack. SU .... 1215796