DE6930247U - DEVICE FOR FORMING BLANKS INTO SHELL-SHAPED PIECES. - Google Patents

Description

> ί. PSÄ ^ VR JCCmlG Patent Attorney T

Deutsche Bank AG Stuttgart ^^!

Telephone: (0711) 6285 61 Account No. 8 & / 00300 " \ Telegram: Koenigpat 7000 STUTTGART-I, Klüpfeletraßo 6 Postscheck Sigt. 84 919

P.O. Box 61. ·. |

THE CHESTERFIELD TUBE CO. LTD. Chesterfield, Derbyshire (Great Britain)

Device for forming
Blanks in bowl-shaped fittings

The innovation relates to a device for reshaping blanks into shell-shaped molded pieces, in particular in sleeves, with a punch which can be connected to a punch receiver of a press and which has a front part intended for engagement in the blank on its front section, and also with a receptacle for the blank and a support ring for the front part of the stamp, the

can slide on the front part of the punch, the receptacle for the blank having a housing which can be mounted on a press bed and which has a recess at its upper end for passing through the front part of the punch, furthermore a lateral opening for inserting the blank and removing the made provided the fitting and a guide for the. Has support ring and which also has * .n its interior a recess for a block which has a recess provided for receiving the blank, the diameter of the front part of the punch is smaller than the diameter of the recess in this block, so that a Recess of this block arranged blank is extruded backwards around the front part of the punch when this front part of the punch is moved into this recess during a movement of the punch in the direction of the press bed, the support ring during the extrusion through the extruded parts of the blank on the front part of the stamp is moved backwards.

In a known device of this type, the support ring cannot be removed from the housing. This makes it difficult to remove the molded part produced and then insert a new blank. The blank must be known for this Device also have a diameter adapted to the diameter of the bore of the support ring and thus the diameter of the punch front part, since it senses through the support ring up to the beginning of the press is held centrically by pointing over the serving for its inclusion The recess of the block protrudes slightly and protrudes positively into the bore of the support ring. However, this complicates the

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closing presses and can also damage the support ring or lead punch during pressing.

The object of the present innovation is to provide an improved device for producing such shell-shaped molded pieces to accomplish. In particular, it is an object of the innovation to create a backward extrusion device i.u, which is particularly suitable for good guidance of the stamp is structurally simple, easy to use and operationally reliable.

According to the innovation, it is provided in a device of the above type that the lateral opening of the housing is formed in such a way is that the support ring can be inserted through it into this housing and removed from it, and that preferably the Blank fills the recess of the block.

Further features of the innovation are in the following description, the drawing and the subclaims described or shown, it being understood that the innovation in numerous other Embodiments can be realized.

The drawing shows a partial and partially sectioned representation of a front view of a preferred exemplary embodiment of a device according to the invention. She assigns an im whole with 10 designated stamp on. This has a mandrel 11 intended to be pressed into the blank, which with a guide part 12 of the punch is connected. The stamp 10

is in a suitable, known manner with the ram (punch pick-up) 13 connected to a press so that it can "swim" relative to the ram.

Below the ram there is one that is used to hold the pole pieces V7erkzeug arranged, which has a housing 14 of substantially tubular shape, which in any suitable, known manner can be connected to the bed 15 of the press. At the upper end of the housing 14 is an opening 16, which with e ^ nem bearing 17 is provided in the manner shown. The light one The width of the opening 16 is so large that the mandrel 11 of the punch can penetrate through them with play, but that during the working stroke of the punch 10, the guide part 12 of the punch is guided and stored by the warehouse 17.

In the housing 14 is a receptacle serving to receive the blank (Block, die) 18 arranged in the manner shown, which can rest on an anvil 19, which in the hollow interior of the housing 14 protrudes as shown. The pickup 18 has a depression or recess 20 into which a Blank, preferably a metallic Pohlina, can be introduced. The diameter of the recess 20 of the transducer 18 is slightly larger than the diameter of the mandrel 11 of the punch IC, whereas when the blank is inserted into the receptacle 18, it fills the recess 20.

This device also has a mandrel support ring or mandrel guide ring 21, which, as shown in the drawing,

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is within the hollow interior of the housing 14 in use. Furthermore, as shown, the housing has a window on each side in the region of the upper end of its hollow interior or opening 22 through which accesses are created into the interior of the housing.

To use this device, the ram 10 is first withdrawn to its full lines or upper position and the receptacle 18 is by one the side window 22 is inserted into the interior of the housing 14 and then lowered into the housing until it is on the top The end face of the anvil 19 is seated. The blank is then inserted into the recess of the transducer 18 and finally nor the support ring 21 inserted into the housing in such a way that it rests on the upper side of the blank and the block-shaped receptacle 18 rests. Then the punch 10 is adjusted by means of the ram moved down so that its mandrel comes into engagement with the top of the blank. Further downward movement of the punch will the blank located in the recess is pressed backwards over the mandrel 11 (extruded, extruded), so that the sleeve-like, hollow shaped piece designated by 23 is produced, which corresponds to a tube with a closed bottom. How to recognize is, the support ring 21 is pressed backwards along the mandrel upwards and finally during the pressure forming process the punch 10 reaches the lower end position indicated by 24 and shown in dash-dotted lines. Then the stamp 10 is pulled back upwards again and the support ring 21 comes to the stripping shoulder located on the underside of the opening 16

to rest, so that the support ring 21 and the finished sleeve 23 is stripped from the punch during the further upward movement of the punch. The finished sleeve and the support ring 21 can can then be removed through the side opening 22 before a new blank is inserted into the recess 20 of the receptacle 18 for manufacture another sleeve is used.

After this made by compression deformation from the Pohling the sleeve 23 can be subjected to further manufacturing operations in order to further process it into a gas cylinder (gas cylinder).

As can be seen from the drawing, a cylindrical portion of the interior of the closes above the transducer 18 Housing 14, the diameter of which corresponds to the diameter of the transducer and the diameter of the support ring 21. At the beginning of During the compression deformation process of the blank, the support ring 21 rests on the upper side of the transducer 18, as mentioned. As a result of his Guide in this cylindrical portion of the housing interior leads and he in turn supports the mandrel 11, this guide and support takes place until the support ring 21 passes through the upper edge of the sleeve 23 being formed in the direction of the Guide part 12 ^ u from the cylindrical portion leading him of the housing interior reaches the upwardly adjoining, expanded area of the housing interior. This support ring 21 is used therefore according to the invention at least during an initial work stage of guiding the mandrel 11, during this the blank deformed by compression, which is a considerable advantage.

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Claims (3)

1. Device for forming blanks into shell-shaped fittings, especially in sleeves, with one with a punch receiver one Press-connectable punch, which has a front part intended for engagement in the blank on its front portion, furthermore with a receptacle for the blank and a support ring for the 'front part of the punch, which slide on the front part of the punch can, with the recording for the Pohling £ in on a press bed has mountable housing, which at its upper end has a recess for passing the front part of the stamp, further a lateral opening for inserting the blank and removing the molded piece produced and a guide for the Has support ring and which also has in its interior a recess for a block, which is provided for receiving the blank Has recess, the diameter of the front part of the punch being smaller than the diameter of the recess in this block, so that a blank arranged in the recess of this block around the front part of the punch to the rear is extruded when this punch ^ front part at a in the direction of the press bed movement of the punch is moved into this recess, the support ring during of pressing through the extruded parts of the pile is shifted backwards on the front part of the stamp, thereby characterized in that the lateral opening (22) of the housing (> C0 is designed so that the Support ring (21) can be inserted through it into this housing and is removable from it, and that the blank preferably fills the recess (20) of the block (18), j 2. Device according to claim 1, characterized in that the
Side of the housing (14) which is opposite the side having the opening (22) / also has an opening through which the interior of the housing is accessible. 3. Device according to claim 1 or 2, characterized in that the inner space of the housing (14) is stepped in such a way that a cylindrical first partial area of the inner space adjoins the block (20) . ', the diameter of which corresponds to the outer diameter of the support ring (21) and thus guides the support ring, which thereby accordingly guides the punch, and that at this first part area a second part area of the widened diameter
Housing interior adjoins, in which the support ring is not guided on the outside, so that the support ring is guided on the outside only through the first partial area and thus at least during the initial stage of the backward extrusion.