SU266711A1 - Die for making hollow articles from sheet billet - Google Patents

Description

The invention relates to dies for the manufacture of parts from sheet blanks by drawing. ;

Punches are known for making hollow parts from sheet blanks, comprising a die-punch, die-cutting and extruding punches mounted on the lower and upper plates.

However, on the well-known stamps it is impossible to obtain products with edge longitudinal grooves.

The proposed stamp is provided with an additional punch fixed on the bottom plate with an additional punch with grooves having cutting edges and corresponding grooves of the product being made in shape, location and dimensions, and an additional matrix co-axially mounted on the top plate consisting of interacting with corresponding an additional punch of the fixed cutting insert and a movable cutting insert located inside it, having the possibility of moving in the axial direction approaching the movement of the exhaust punch by an amount equal to the depth of the grooves it cuts.

Such constructive execution of the stamp ensures the production on the side surface of products of longitudinal grooves.

In Fig.1 shows the proposed stamp, a general view) in Fig.2 - the same, top view, fig.Z - view along arrow A of Fig.1; in Fig.4 a section along bb In Fig.1; Fig. 5 is a detail in two projections, the general view in Fig. 6-8 is a diagram of the arrangement of the deforming surfaces of the matrix and the punch for combined drawing and shaped chipping; Figures 9-17 show the sequence of shaping the workpiece when the stamp is in operation.

The stamp contains a buffer 1, mounted on the bottom plate, -2 the punch holder 3 additional punch 4,

0 in which the exhaust punch 5 is fastened. According to the additional punch, an ejector 6 is moved, placed in the hole of the cutting punch 7. On the upper plate 8 of the holder 5, fixed insert 10 is fixed inside which is mounted a movable insert 11, the upper end of which by spring 12 is inserted through i ka 13 and the pusher 14, o pressed against the slider 15, having located in

two levels of support surfaces for the movable insert 11 and the die matrix 16, which moves along the outer surface of the fixed insert 10 and is pressed against the slider by a spring 17 located between the die flange of the die and the clamp 18 attached to the holder 9 by screws 19 with springs 20 mounted on them.

The slider moves in the direction perpendicular to the punch under the action of the wedge 21 and the springs 22 put on the screws 23. In one of the extreme positions of the slider its supporting surfaces are placed under the punch matrix and the movable insert 11. When the slider moves to another extreme position its supporting surfaces are displaced and lose contact with the respective surfaces of the end faces at the beginning of the die punch,

and then - the mobile insert. I

The job of the stamp is as follows.

During the working stroke of the press, the block 24 is cut out of the strip of material by cutting the die 7 and the die matrix 16, (FIG. 9). The internal cavity of the matrix punch 16 is machined together with the stationary 10 and the movable 11 inserts and contains conical and cylindrical surfaces designed to stretch the part 25 and the shaped stump of the edge of its side surface. The transition from cylinder to cone to improve the quality of the chipping is performed without any rounding.

The slab is then clamped by a force of buffer 1 between the punch 16 and the ejector bis using the exhaust punch 7 is drawn into the cavity of the punch matrix 16 (FIG. 10) to form a cylindrical cup with a flange having a cylinder-forming length equal to start grooves.

Before the end of this period of operation of the punch, the punch-matrix 16, the stationary 10 and the movable 11 inserts are connected to each other and form (6) a composite stretch matrix with one common deforming surface of a complex shape (PLOSKOST BG, radius transition to a cone, cone, cylinder).

When the press travel continues, the slider 15 under the influence of the wedge 21 and the adjustable support 26 turns into a position in which its bearing surface does not contact the upper end of the die 16, and the latter, under the influence of the spring 17., will move 6 in the opposite direction of the press by the value of 1, equal to the height of the deep grooves. This will open the cutting edges on the outer lateral edges of the fixed insert 10.

1Fig. 7), which, interacting with cutting edges, on the side edges of the corresponding grooves at the working end of the additional punch 4, cuts the workpiece along the vertical ones. j areas of the contour of the deep grooves of the part located between the beginning levels of the deep and shallow grooves (Fig. 11-12).

After stretching to start level

Q small grooves, the slider moves to a position in which its support surface does not contact with the upper end of the movable insert 11, and the latter under the influence of 12 will shift in the direction opposite to the press stroke by an amount 1 equal to the height of the small grooves. This will open the cutting edges on the lateral edges of the inner groove of the fixed insert 10 (Fig. 8), which, interacting with the cutting edges of the side edges

faces of the corresponding grooves on the additional punch 4, make an incision of the workpiece on the vertical sections of the contour of the small grooves of the part.

c. After cutting the blank along the vertical sections of the contour of all the slots of the part (Figures 13-14), when interacting are located in three levels; transition sections from a cone to a cylinder of a punch-matrix, movable and fixed inserts with horizontal cutting edges of an additional punch are simultaneously cut off along the horizontal sections of the grooves of the part located in three levels

with complex waste separation

(Fig.15-16). During the return stroke of the press, the pusher 14 rests on the crossbar of the press, which with the help of the flange rod 13 pushes the resulting

0 detail with departure from the punch-matrix. In this case, the movable insert 11 is displaced to the extreme lower position, as well as the punch-matrix 16, on which the pusher 14 acts through the fifth

27 and the rods 28, and the slide 15, as a result of the displacement of the wedge 21, moves to the initial position under the action of the spring 29, thereby providing support for the die-punch 16 and

 the mobile insert 11 at the next

 working course.

In order to obtain a part with a large relative height, which requires several stretches of stretching, a blank for the stamp of a combined stretch. and the shaped stub is hollow. the glass obtained at the preliminary operatives 1 and x extracts. In this stamped case, operations are combined.

0 the last stretch and shaped stump. The principal design of the punch design remains similar to that described for. with the exception of the fixation unit of the workpiece, which is a presetter moving. on cutting punch.

invention formula

A punch for manufacturing hollow articles from sheet stock, comprising a die-cutter, punch and exhaust punches mounted on the bottom and top plates, characterized in that, in order to obtain longitudinal grooves on the side surface, the plates are fixed on the bottom plate.

an additional punch with an additional punch with grooves having cutting edges and corresponding grooves of the product being made in shape, location and size, and an additional matrix mounted on the upper plate coaxially with the additional punch, consisting of an additional punch with fixed grooves of the additional punch of the fixed cutting insert and inside it is a movable insert, j having the possibility of movement in the axial direction towards the movement of the exhaust punch by an amount equal to bin cut down its grooves.

Claims (1)

Claim A stamp for the manufacture of hollow products from a sheet blank containing a punch-matrix mounted on the lower and upper plates, a punch and an exhaust punches, characterized in that, in order to obtain longitudinal grooves on the side surface of the products, it is equipped with an additional concentric exhaust punch mounted on the lower plate a punch with grooves having cutting edges and corresponding in shape, location and size to the grooves of the manufactured product, and mounted on the top plate coaxially with an additional punch a dividing matrix consisting of an additional punch of a stationary cutting insert and a movable cutting insert placed inside it, I having the ability to move in the axial direction towards the movement of the exhaust punch by an amount equal to the depth of the grooves cut by it. <pUf. 3 d O) 91 c, FIG. 5 FIG. H fig 6 FIG. 7 FIG. 8 Fig. D ^ e. / 5 p Fig. 16.J · FIG. 17