DE535586C - Manufacture of scissors legs or similar tools - Google Patents

Description

In order to achieve a quick and cheap production of scissor legs, it is proposed been to bend a brightly drawn profile wire to the scissors eye, to which then the stalk produced by pressing is welded on. In this known method, one has to weld them together of the individual parts of the scissors arm the assembled 'piece of a Deburring and further post-treatment, such as polishing, corrugation, knurling ο. like., undergo.

Because the pieces that are subjected to these post-treatments are already curved The shape of the scissor shanks makes aftercare lengthy and inconvenient, which increases the price of the scissors is increased significantly.

It has also already been suggested that the eye and the stalk from one raw Bending a piece of wire, which is then pressed, deburred and polished. In this procedure the same drawback is present as with the procedure already mentioned, because also An expensive post-processing is necessary, which significantly increases the price of the scissors elevated.

The method according to the invention remedies this drawback by that such a wire is used to bend the eye together with the stalk or the entire scissor shank, which makes the cross-sections and possibly also the surface properties, such as corrugation, knurling

or the like. of the eye and stalk of the finished workpiece in the unwound state. This ensures that the post-processing after bending and welding, if it is necessary at all, it is reduced to a small degree.

The manufacture of a scissors arm according to the invention is illustrated in the drawing.

Fig. Ι "shows the starting piece consisting of a simple piece of wire.

Fig. 2 shows the same piece after pulling it out.

Fig. 3 shows the piece of wire bent towards the eye with the stalk of the scissors leg.

Figs. 4, 5 and 6 show different ways of connecting the stalk to the scissor blade.

Fig. 7 and 8 show embodiments of scissors legs, in which the end of the stalk is flattened or forked.

FIGS. 9 and 10 show another embodiment of a scissor arm in two views.

Figs. 11 to 15 show further embodiments.

Fig. 16 shows different cross sections of the wire to be used.

Fig. 17 shows an embodiment in which a whole scissor arm from one Piece of wire is made.

The various stages in the manufacture of the scissor arm according to Fig. 1 to 3 are the following:

A piece of wire 1 is on part of its length, for. B. by rolling out, so

stretches that this part 2 has a thinned cross-section.

This "piece is then flat or crooked so that the eye 3 is created with the stalk 4, the part 1 with a thicker cross-section forming the stalk and being welded along a surface 6 to the separately manufactured and hardened sheet 5. The free end of the weak portion 2, wel-J ₀ rather forms the eye 3 can be connected to the legs 4 by pinning, welding, mortise or riveting.

There are many ways to change the procedure. For now you can be very different Choose the type of connection between stalk and leaf.

As shown in Fig. 4, the stalk can be connected to a base of the leaf with a clamp will.

The stalk can at its end and on a subsequent part of its length according to Fig. 5 to be welded to a shoulder of the blade:

At the end, the stalk can be bent in a straight line so that this straight part adjoins the Blade can be welded on, as shown in Fig. 6.

The end of the stalk 4, which is welded to the blade 5, can also be flattened so that it can be more easily welded to the blade, as Fig. 7 shows. You can also divide the end of the stalk 4 into parts 4 ¹ and 4? Split, as Fig. 8 shows, for the purpose of decoration or for the purpose of strengthening the connection between the stalk and the leaf.

In the embodiment of Figs. 9 and 10, the bent and flattened wire forms the eye 3, the stalk 4 and a reinforcement approach 35, which with a hole for Insertion of the scissor axis is provided. The flattened extension 35 can be upset at the end so that it can be attached to the part where the Axis goes through, has a greater strength, because the scissors are most stressed there will.

The method described can easily be used to decorate the scissors. For example, lines or grooves can be made on the wire forming the stalk 4, as Fig. 11 shows, these grooves also affect the sliding of the fingers on the eye or the stalk of the scissors.

One can use the wire that forms the stalk

also give different shapes by upsetting, bending and drawing in and it with Decorations provided, for example, with approaches 11 as shown in Fig. 13, which at the same time decorate and make the scissors easier to use.

The change in cross-section of the piece of wire and the decoration of the surface can also can be effected in one and the same operation without the existing one from the beginning The smoothness of the wire is impaired on the unchanged parts of the surface will.

In the embodiment shown in Fig. 14, the wire is returned along the legs 4 ⁸ , 4 *, so that it forms a double stalk, which on the one hand gives the scissors an artistic look and on the other hand makes the weight easier.

The end of the recirculated branch 4 ⁴ can be welded to the eye at 12, to the gap to enhance yet. '

In the variant according to Fig. 15, the wire is bent in such a way that a double stalk 4 ⁵ , 4 ^{e is} created following the eye 3. In this case, the two branches of the stalk can be ^{welded separately to an attachment 5 1 of} the scissor blade.

One can use wires of very different cross-sections to form the eye and the Use the stalk of the scissor shank, as shown in Fig. 16. These cross sections go can by forging ,. Pulling or rolling can be achieved; these cross-sections can be continuous or different along the wire, with the corresponding Machining carried out on the wire in cold or warm conditions prior to cutting can be. The wire can be corrugated, knurled, scored or twisted.

The wire can also be replaced by a hollow wire, which is treated similarly, as set out above for the solid wires.

Another embodiment according to Fig. 17 is that the original wire is chosen so long that it can also be used to form the blade of the scissors at one end of the wire by pressing, while the other end is used to form the stalk or the Halmes and the eye n _{0 is} bent.

This process, which allows the two legs of the scissors to be welded can mainly be used to make small scissors, whose leaves must be very thin.

The method according to the invention has compared to the production methods used hitherto the following advantages:

For the time being, it allows the diverse handling of cutting, pressing and polishing by a simple drawing process

to be replaced with a subsequent bend, which saves time. It will in addition, the metal losses due to the burrs produced during pressing are avoided, that is Metal savings achieved. The fact that one uses an already smoothed wire saves one almost entirely polishing and brushing the piece afterwards, especially since bending the surface of the metal is not

ίο worsened. Permitted for the same reason the process of pressing lines, grooves or holes on the stalk or eye, which are useful or ornamental to manipulation. Since this work is done before the bend, so on one straight pieces, so they are easier to execute and can in certain cases be of a number Workpieces are made at the same time, thus significant labor savings is achieved.

The process also allows cold-pressed or cold-pressed metal sheets to use scissor blades made by cutting out of polished sheet metal.

In this case, the smoothing has already been carried out on the plate or the metal sheet, instead of doing this on the finished pair of scissors. This makes the handwork strong reduced and achieved a great discount. The hardening of the blade can be done without affecting the smoothness of the piece.

The method also allows any

Use of different metals on the different parts of the scissors.

Claims (7)

Patent claims: i. Process for the production of Scissors legs or similar tools in which the scissors eye together with the stalk or the whole scissors shank is bent from a piece of wire, characterized in that the Wire piece before the bend, the cross-sections and, if necessary, the surface properties of the eye and Straw of the finished workpiece received in the unwound state. 2. The method according to claim 1, characterized in that the previously smoothed Wire piece is stretched so that the strongest cross-section is present on the part corresponding to the stalk. 3. The method according to claim 1 and 2, characterized in that the stalk end to be connected to the scissors blade is previously pressed, pressed or split (4 ¹ , 4 ² ). 4. The method according to claim 1 and 2, characterized in that the piece of wire is bent so that a two-armed stalk is formed (4 ^s , 4 ⁴ ). 5. According to the method of claims ι and 2 manufactured scissors legs, characterized in that the bent piece of wire only the eye and forms the approach of the stalk. 6. scissors legs according to claim 5, characterized in that the flattened Wire piece the eye (3), the stalk (4) and the reinforced by compression, penetrated by the scissors axis Part (35) forms. 7. The method according to claim 4, characterized in that the scissor blade (5) is made by pressing out a part of the piece of wire, while the previously smoothed or otherwise machined Part of the wire is bent to the stalk and eye. 1 sheet of drawings