SU1134260A2 - Die for progressive multistep drawing - Google Patents

Abstract

1. STAMP FOR SEQUENTIAL MULTI-TRANSFER EXTRACT by ed. St. No. 858981, characterized in that, in order to expand technological capabilities due to the flange of the elongated part, the punch of the last junction is made of two coaxially mounted parts, internally of which is installed with axial rotation, the chip is fitted with the last junction installed inside the matrix the possibility of axial rotation of the sleeve with the protrusion located on its outer side surface, and the mechanism of rotation of the sleeve, while the ends of the matrix of the last transition in contact with each other and bushings, as well as the inner pivot and outer fixed parts of the punch are made with cutting edges. 2. A stamp according to claim 1, characterized in that the mechanism for rotating the sleeve is made. in the form of a carriage with a protrusion on the working surface, installed with the possibility of interaction with the protrusion of the sleeve. 3. A stamp according to claim 1, characterized in that the axis of symmetry of the sleeve and the inner turning part of the punch of the last transition is offset relative to the axis of symmetry of the matrix and the outside of the punch of the last transition. § 4. Stamp according to claim 1, characterized in that placed in the inner part of the last punch pusher spring-loaded to the top plate ejector. 61 5 8 10 9 СО 4 Ьо О5

Description

The invention relates to the processing of metals by pressure and relates to die tooling.

According to the main author. St. No. 858981 is known as a strain for sequential multispeed stretching, containing upper and lower plates, carrying working tools in the form of punches and dies, and a m-puller in the form of a spring-loaded plate. One of the tools of the first transition of the hood is installed with the possibility of axial movement relative to similar tools of the other transitions. Matrices are mounted on the top plate for drawing out, starting with the second transition, and the matrix of the first transition is set in the puller 1.

A disadvantage of the known chipboard is its limited technological capabilities, which are due to the fact that it does not provide for trimming the flange of the elongated part.

The purpose of the invention is the expansion of technological capabilities.

This goal is achieved by the fact that in schtampe for consistent multijunction stretching the punch of the last transition is made of two coaxially mounted parts, internally of which is installed with axial rotation, the stamp is provided with the last transition installed inside the matrix of the transition with axial rotation , the matrix of the last junction matrix and bushings, as well as the internal rotary and. the outer fixed parts of the punch are made with cutting edges.

The mechanism of rotation of the sleeve is made in the form of a carriage with a protrusion on the working surface, installed with the possibility of interaction with the protrusion of the sleeve.

The axis of symmetry of the sleeve and the inner turning part of the punch of the last transition is offset relative to the axis of symmetry of the matrix and the outer part of the punch of the last transition.

When this stamp is provided placed in the inner part of the punch of the last transition spring-loaded to the top plate ejector.

FIG. 1 shows a stamp, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 - stamp for extracting parts bottom up.

The stamp contains the upper plate, on which the punch 2 of the first exhaust junction is fixed. The punch 3 of the second exhaust junction is mounted in the clamping plate 4, suspended from the plate 1 on the screws 5 and spring-loaded 6 with respect to it.

In the plate 4, equipped with a travel stop 7, there is a punch of the last exhaust junction, made of coaxially mounted parts 8 and 9, the inner 8 of which are hollow and mounted with the possibility of axial rotation. In the inner part 8 of the punch is placed spring-loaded spring 10 to the plate 1 ejector 11.

In the plate 4 is installed spring-loaded latch 12, interacting with the feed blank carriage 13 mounted on the puller 14. spring-loaded relative to the bottom plate 15 springs 16, the force of which is less than the force of the spring 6 clamp. The puller 14 is held by the step screws 17.

The feed carriage 13 is provided with gripping organs in the form of:) eccentric 18, spring-loaded with respect to the carriage by torsion springs 19 and fitted with hammers 20, periodically interacting with the brackets of the plate 15.

0 On the plate 15, exhaust matrices 21 are mounted. In the matrix of the last transition, a sleeve 22 is installed with an axial rotation with a protrusion on its outer side surface located with the possibility of engagement with the protrusion 23 provided on the working surface of the carriage 13, which has a right side. past the workpiece feeding function and the role of the mechanism of rotation of the sleeve 22. The latter is spring-loaded relative to the plate 15 0 by a torsion spring 24.

Contacting between the ends of the matrix nasolodnogo transition and sleeves 22 have cutting edges in the plane, and the ends of the inner rotary 8 and the outer 9 hour of the last transition have cutting edges in the plane D,

The carriage 13 is spring-loaded spring 25 in the direction of supply of the workpiece (right).

A plate 26 is rigidly fixed on the plate 1, which is installed with the possibility of interaction with the carriage 13.

In order to cut the flange during the manufacture of cylindrical parts, the axis of symmetry of the inner part 8 of the punch of the last junction and the sleeve 22 can be shifted relative to the axis of symmetry 5 of the matrix 21 of the last junction and the outer part, 9 of the last punch.

To hold the inner part 8 of the last punch in the oriented position, a spring-loaded ball lock 27 serves.

The stamp works as follows.

When lowering the plate I with all parts mounted on it, plate 4 with elements 3, 8 and 9 presses the workpiece 28 to the plane of the puller 14 and, in a state of 5, the research institute introduces caps into the dies 21, having pulled out the semi-finished products 29 until the puller 14 does not drop to

the level of working tornes of matrices 21. As a result, all transitions, except the first one, were drained. The outer surface of the semi-finished product 29 of the last non-junction is covered by the sleeve 22, and in the inner surface there are parts 8 and 9 in such a way that the planes C and D coincide. The material of the workpiece 28 is clamped by the tool and released from the impact of the eccentrics 18 when the hammers 20 of the latter are bumped onto the brackets 15.

During the further course of the plate 1 downwardly, the punch 2 carries out a first draw transition. The wedge 26 acts on the bevel of the carriage 13 and moves it to the left idling (with slippage relative to the clamped workpiece 28). At this time, the carriage protrusion 23 abuts against the protrusion of the sleeve 22 and rotates it from position I to position II. Under the action of the spring 24, the sleeve 22 returns to position 1 even when the punch is closed at the bottom dead center. During rotation of the sleeve 22 and the inner part 8 of the poopsop, a part flange of the part is produced along planes C and D when they are combined.

Stroke or 1 goes down. The plate acts on the ejector 11, which, in turn, is pushed to the bottom of the cut product 30 and this is pushed through the die 21 and removed from the die.

At this time, the carriage 13 moves to the left by a value that is somewhat larger than the feed pitch, with the latch 12 dropping into the opening of the carriage 13. This completes the stroke of the plate 1. During this turn, the semifinished products were pulled down.

29, cutting them off from the carrier tape, as well as preparing the carriage 13 for feeding the blank 28 to the next HI a.

When plate 1 moves upward, all the dagels of the device are triggered in the reverse sequence, namely: punch 2 B1 1 comes out of matrix 21, ejector 11 returns upwards by spring 10, clip 26 releases carriage 13 and it returns to action of spring 25

with a lunge on the latch 12, and this determines the fixation of the carriage 13 before feeding the workpiece 28 to the next step. Next, the puller 14, still lifting the workpiece 28 to the lite 4, lifts the latter and removes it from the matrices 21. During this time, the pickup 20 is spawning to be limited to the croppgeins of the plate 15, and the expander 18 again takes up the material of the workpiece 28. After the nozzle grab 28, latch 12 by the scribe () Dit out

0 holes in the carriage 13 and releases the carriage 13, which under the action of the spring 2;) returns to its original position by feeding the workpiece niar. The Jla / Ieo cycle is repeated.

The work of the stamp in the case of the extraction of parts with the bottom up (Fig. 2) is carried out in a similar way.

The technical and economic efficiency of the proposed P1-tampa consists in the possibility of obtaining products of fine cylindrical, box-shaped, irregular or shaped parts by successive stretching with simultaneous cutting of the finished product from the flange on a plane perpendicular to the walls of the product, with BI high quality of the cut.

I

/

2

FIG. five

Claims (4)

1. A STAMP FOR SEQUENTIAL MULTI-TRANSITION EXTRACTION by author. St. No. 858981, characterized in that, in order to expand technological capabilities due to segments of the flange of the elongated part, the punch of the last transition is made of two coaxially mounted parts, the inside of which is installed with the possibility of axial rotation, the stamp is equipped with an installed inside the matrix of the last transition with the possibility of axial rotation of the sleeve with a protrusion located on its outer lateral surface and the mechanism of rotation of the sleeve, while the ends of the matrix of the last transition and the bushings contacting each other ki, as well as the inner rotary and outer stationary parts of the punch are made with cutting edges. 2. The stamp on π. 1, characterized in that the rotation mechanism of the sleeve is made. in the form of a carriage with a protrusion on the working surface, installed with the possibility of interaction with the protrusion of the sleeve. 3. A stamp according to π .. 1, characterized in that the axis of symmetry of the sleeve and the inner rotary part of the punch of the last transition is shifted relative to the axis of symmetry of the matrix and the outer part of the punch of the last transition. § 4. The stamp on π. 1, characterized in that it is provided with a pusher spring-loaded to the upper plate and placed in the inner part of the punch of the last transition.