DE120935C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

In the manufacture of dining forks, the procedure has hitherto been that of cutting out the fork prongs respectively before grinding. Chafing took place. Such cut surfaces are usually very rough; Also, the prongs are usually bent in this type of cutting, which is especially true of the one that pops off Oxide layer or, in other words, the resulting increase the unevenness of the already raw workpiece.

Once the forks have been cut out and grinding or scrubbing takes place, so the weak prongs give way to grinding and / or grinding. Abrasives, bend in the process even more, as a result of which the workpiece then becomes worthless, or at least an inferior one Goods are created.

When these workpieces are rubbed in a drum, they also clump together and thereupon a regular bending of the same by the fork prongs on the one hand, insert themselves into the spaces between the rows of tines of the other workpieces. As soon as the workpieces are pounded and balled together, they no longer rub and with the rolling and falling of such balls, the workpieces are even attached bent in strong places.

Similar inconveniences arise when the legs of the scissors are chafed. There tailor's shears and smaller scissors of all kinds have an eyelet on each thigh, into which, when using them, one usually holds the If the thumb and middle finger are inserted, the thigh will open when forging The formation of the eyelet mentioned was taken with care. But forms when hitting respectively when forging a thin burr on all the edges of these workpieces, which even with my new method, the outer edges were cut off before rubbing becomes, but still remains at the inner edges of the eyelet, so that the eyelet is still completely closed and there is a spotting the tips of the thighs cannot take place in the eyelets of other thighs. Also because of this (as already explained above for fork workpieces) the workpieces will bunch up and bend when rubbing prevented in the drum.

When scrubbing forged keys and similar workpieces that are elongated as well as on are loop-like at one end, the above-mentioned disadvantage also occurs.

It is now completely clear to the person skilled in the art that they are bent in such a way when they are rubbed Fork prongs can hardly be perfectly aligned again, since they resiliently evade every pressure, and that this work is done is also more expensive than the manufacture of new workpieces.

For this reason, the fork prongs are not cut out before grinding, but only cut the outer border of the workpieces after forging or push the same from strip steel respectively.
Sheet metal. To
not

judge such

the end

previous marked out

Work pieces

rindet the grinding resp. Chafing instead. Here you can start working straight away, since using such a procedure bending of the objects during grinding and rubbing is excluded is. Even when the prongs are later cut out, they no longer bend because the cutting tools no longer have to cut through the oxide layer as in the past, so stay sharp and unevenness (which makes it special bending happens) are no longer available.

There are many other work-pieces which go through during processing Grinding and rubbing have similar abuses to those described above Proceedings can be prevented.

Claims (1)

Patent claim: Process for the production of forks, scissors and the like., Characterized in that, that the cutting out of prongs and eyes as well as the removal of the burr from the openings the workpieces only after scouring or. Grinding takes place, for the purpose of bending, pinching and To avoid objects clumping together.