RU1794550C - Progressive compound die - Google Patents

Abstract

Usage: in pressure processing for sheet stamping. SUMMARY OF THE INVENTION: a stamp includes a punch and die for bending elements at an angle and additional bending units for bending elements at a different angle. The stamp comprises a die 7 for bending on a movable plate and a bending punch 5 on a fixed plate. The die 7 has a cutting edge and additional bending punches 19 are mounted therein and levers 21. Each lever has shoulders of different lengths. The cams 17 are rotatably mounted on the fixed plate. For bending at one angle, the cams 17 do not protrude above the punch 5, and then, after cutting the workpiece, only the punch 5 and die 7 participate in bending. For bending, the cams 17 rotate and they protrude above the punch 5. In this case, after cutting and during bending with the matrix 7 over the punch 5, the levers 21 come into contact with their shorter shoulders with the cams 17, and with their longer shoulders additional punches 19 are moved from the matrix 7 and they carry out SCU elements from a different angle. 16 ill. ate with

Description

The invention relates to the processing of metals by pressure, in particular to the processing of sheet material, and can be used for the manufacture of embedded parts used in construction.

A combined action stamp is known comprising a fixed plate on which a die for making holes with a cutting edge is mounted and a bending punch, and a moving plate on which there are mounted punches for making holes and a bending die with a cutting edge (prototype). The disadvantage is the narrow technological possibilities due to the impossibility of changing the angle of folding of the ears.

The aim of the invention is to expand technological capabilities through

bending elements of parts at different angles.

This goal is achieved by the fact that in the known stamp of sequentially combined action for processing strip material containing a fixed plate on which a matrix is mounted for making holes with a cutting edge and a bending punch, and a moving plate on which are installed punches for making holes and a matrix for bending with a cutting edge according to the invention: the stamp is equipped with at least one additional bending unit containing a cam mounted on a fixed plate with the possibility of rotation around and, perpendicular to the axis of pressure of the stamp, an additional punch for bending,

vj o

4 SL SL

located in the bending matrix with the ability to move parallel to the pressure axis, and a two-arm lever having shoulders of different lengths and located on the bending matrix with the ability to rotate around the pressure axis and interacting with the smaller shoulder with the cam and the larger one with an additional punch.

In FIG. 1 is a general view of the stamp; in FIG.

2 - bottom plan; in FIG. 3 - section of a U-shaped knife; in FIG. 4, 5, 6 - phases of eyelet bending in Fig. 7 - process of eyelet bending at an angle determined by the shape of the knife; in FIG. 8 and 9 show the bending of a wide eyelet, respectively, at an angle of 90 ° and at an obtuse angle; on Fig, 10, 11, 12 presents options stamped parts (modules) with ears, bent at different angles, which can be made on the proposed stamp; in FIG. 13,14,15 - embedded parts made of the presented modules; in Fig. 16 - embedded part is a closed table welded from two stamped modules.

The stamp of successively combined action comprises a fixed plate 1 and a movable plate 2.

A matrix 3 is rigidly fixed on the fixed plate 1 to obtain holes 4, a flexible matrix 5 with a puller. The matrix

3 also acts as a support knife.

A matrix 6 for bending is fixed on the fixed plate 2. It contains a U-shaped knife 7, and in addition, a punch holder 8 and a puller-clamp 9. Four punches 11 are installed in a cylindrical guide 10 in the punch holder 8. 9 is spring-loaded by springs 12 located in the punch holder 8.

In the process, pieces of the part 13 from the sheet strip 14 with the U-shaped knife 7 form ears 15 on one side of the part and wide eye 16 on the other.

Two rotary cams 17 are mounted on the bending matrix 5, each of which is a cylinder with a cut segment.

In the knife 7, closer to its edges, with the possibility of reciprocating movement parallel to the pressure axis, two bending punches 19 are installed in the cylindrical guides 18 for bending the ears 15. The punches 19 are spring-loaded with springs 20.

Two two-arm levers 21 are pivotally mounted on the knife 7. One end of the lever 21 is able to interact with the corresponding cam 17 at the position of the latter, shown in FIG. 4, 5 and 6. The other end of the lever 21 through the pin 22 is in contact with the corresponding bending punch 19. In this case, the length of the shoulder in contact with the punch 19 is greater than the shoulder in contact with the cam 17.

To bend the wide eyelet 16, which is formed between the ears 15 during the cutting. Details 13 in the bending matrix 6, guides 23 are made with a bending punch 24 installed in them, which is in contact with the eccentric 26 located in the guide 25.

The stamp works as follows.

The feed mechanism (to hell, not shown) feeds the strip of sheet material 14 with the matrix 3 and the puller-clamp 9. During the movement of the movable plate 2 downward at the first step of the strip of metal 14 with punches 11, holes 4 are made and a piece of part 13c is formed by forming a wide eyelet 16 The end portions of strip 14 go to waste. In the second and subsequent steps of the metal strip 14, when the plate 2 moves downward, holes 4 are made at the same time, part -13 is cut to form the ears 15 and bent, as well as the wide eye 16 formed during the previous step.

In this case, if both cams 17 occupy the position indicated in FIG. 7, the cam 17 does not come into contact with the lever 21. The knife 7 and the bending punch 19 move at the same speed and the bending angle of the eye 15 is determined by the shape of the knife 7.

If it is necessary to carry out one or two ears 15 at an angle of 90P, respectively, one or both of the cams 17 is set to the position shown in FIG. 4, 5 and 6. During the movement of the knife 7 with the punch 19 downward, the corresponding end of the lever 21 is in contact with the cylindrical surface of the cam 17 and. as a result of the difference in the lengths of the shoulders of the lever 21, an accelerated movement of the punch 19 down occurs. Thus, 90 ° bending of one or two ears 15 can be carried out depending on the need.

At the same time, when the movable plate 2 moves down on the other side of the matrix 5, the wide eye 16 is bent by the punch 16. The angle of the wide eye 16 is bent depending on the position of the punch 24, which, in turn, is due to the position of the eccentric 26 in contact with it.

When the movable plate 2 moves upward, the strip of metal 14 is removed from the punches 11 for making holes 4 and the knife 7 with the help of pullers.

After the manufacture of parts 13 (the so-called modules), reinforcing bars 27 are welded to the flanged holes 4 on the contact machine — they get

embedded parts of building structures.

Claims (1)

SUMMARY OF THE INVENTION A stamp for sequentially processing a strip material comprising a fixed plate on which a die for making holes with a cutting edge is mounted and a bending punch, and a movable plate on which there are punches for making holes and a bending matrix with a cutting edge, different the fact that, in order to expand technological capabilities by bending the elements of parts at various angles, the stamp is equipped with at least one additional bending unit, containing holding a cam mounted on a fixed plate with the possibility of rotation around the axis, perpendicular to the axis of pressure of the stamp, an additional bending punch located in the bending matrix with the ability to move parallel to the pressure axis, and a two-arm lever having shoulders of different lengths and located on the matrix for bending with the possibility of rotation around an axis perpendicular to the axis of pressure, and interacting with the smaller shoulder with the cam and the larger with the additional punch. 5 -JH $ 09St 6il