DE3127746A1 - SEASON TO HOLD POCKETED SMALL METAL PARTS IN SURFACE TREATMENT - Google Patents

Abstract

1. Apparatus for the production of wires for converting with U-shaped loops for converting under electrical contact discrete metallic components equipped with a pocket, with a feeding aggregate (131) for stepwise feeding of a wire, with a bending station (102) having two bending tools (108, 109) being arranged with a gap (110) to each other, the downstream tool (109) being movable for one feeding step out of the path of a formed U-shaped loop (122), and with a ram (112) being reciprocable into and away from the gap (110) between the bending tools, characterized in that the bending station (102) is arranged besides a straight channel (100), that a wire feeding mechanism (106) ending in the channel is provided, that the ram is reciprocable into and away from the gap between the bending tools and is arranged on the side of the bending tools facing the channel, and that the channel has a passage (116) for the ram.

Description

Applicant:

Gustav ERHARDT Bergstrasse 25 6969 Hainstadt

Official file number:

Applicant's file number:

New registration P 32 704

Representative:

Dr. Hans Karl HACH patent attorney Tarunstraße 23 D-6950 Mosbach-Waldstadt

Description:

Relay for holding small metal parts with a pocket at the Surface treatment

P 32 704 8.7 81.

Relay for holding small metal parts provided with a pocket during surface treatment

The invention relates to a relay for holding small metal parts provided with a pocket with electrical contact when surface treatment using an electric field with projections for the individual pockets, the corresponding the size of the associated small parts are arranged spaced apart on the relay.

The small metal parts in question are Profiles, tubes, rings and the like with recesses, holes, profile cavities or the like serving as pockets, their Bags are usually covered in fully assembled small parts, so it is useful to these small parts in the Surface treatment to be held by a protrusion engaging in the pocket, because there by the holder on top surface treatment defects caused are the least detrimental. When surface treatment using a electric field can be electrolytic processes, for example electroplating, electrolytic polishing, or around act anodic oxidation. It can also be a process to be carried out in a normal atmosphere, such as spraying be about lacquer or paint. Anodic oxidation of aluminum is also called anodizing and in the so-called sloxing bath carried out.

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P 32 704

Metal plates have been attached for such a relay
Provided thorns on which the small parts with their pockets -be put. Because of the necessary electrical contact with the mandrels, such a relay consists of electrically conductive metal and the electrical contact is achieved by
Touching the small metal part in question under its own weight. However, this electrical contact is unsafe and requires careful surface cleaning of the relevant
Mandrels that are required after each use because the relay is inevitably involved in the surface treatment of the small metal parts.

The object of the invention is to design a relay of the type mentioned so that the small parts as possible
Find good electrical contact and a secure hold.

The invention is characterized in that the projections
U-bends of a resilient wire are, the legs of which are spread at each o ££ enen end with a small acute splay angle and by pressing their legs together into one
matching bag.

With such a relay, the small parts are clamped on and
the electrical contact is generated under clamping pressure,
which can be dimensioned sufficiently high even with light small parts. With a sufficient clamping pressure, one can also
Achieve secure contact when the surface of the relay
Has soiling, so that you can be satisfied with., Less cleaning effort. Such a scale is also extremely cheap to manufacture, so that a single use can be economically justified and then the cleaning required for re-use becomes superfluous.

The stave, bent from wire, offers chemical pickling fluids Free access for removing an order in the event of reuse, so that the pickling process can be carried out easily and the scale can be used repeatedly a few times as long as the wire size is

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avoidable removal is still sufficient.

The U-bends can be easily put in and out of the pockets due to the springing of their legs, especially if the U-legs are pressed together on an acute angle bracket that is smaller than the angle of spread, fit tightly in an accompanying bag.

The invention is preferably applicable to the anodizing of small parts made of aluminum or aluminum alloys. In such a In order to avoid electrolytic tension, a wire mesh made of aluminum wire is expediently applied to the case has the necessary rigidity and resilience, is appropriately hard-drawn.

A preferred embodiment of the invention is characterized in that that the relay consists of a continuous wire, the serpentine to alternate to opposite Sides aligned U-arcs is curved. The U-bends on each side can be shaped identically to one another, or it can the U-bends on both sides can be shaped identically to each other. The U-bends expediently extend in a common Arch plane, but they can also preferably extend with an increasing angle of attack from U-bend to U-bend.

Several wire rod lengths, their U-bends each in one Extending common arc plane can, based on their arc planes plane-parallel next to one another and based on their longitudinal extent be hung vertically and at a distance from one another on a common relay beam. In this case the Wire stagger lengths freely next to each other and can move with their lower ends against each other.

Such movements can be prevented by adjusting the wire length are enclosed in a common staggered frame by having their respective upper ends at the top, as Staffeiträger serving frame and with their lower ends are attached to a lower frame strip.

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For storage purposes, it is advisable to use a graduated wire strand made up of several pieces formed from a common, continuous wire, lined up relays, whose U-arcs are in a extend common arch plane to roll up on a storage bobbin, wherein the U-bends are curved parallel to the respective arc plane over an axis of curvature.

You can remove the small parts treated with the help of the staggered treatment from the staggered, you can but also left on the squadrons in order to store and transport them in an orderly manner with the help of the squadrons until they are then at for further processing can be removed from the scales if necessary.

The invention will now be explained in more detail with reference to the accompanying drawing.

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In the drawing shows:

Figure 1 shows a small part, attached to a U-bend

a season according to the invention,

Figure 2 two small parts, attached to adjacent ones

U-bends of a relay,

Figure 3 shows the section of a relay with U-bends

Figures 1 and 2,

Figure 4 is a modification of the season from Figure 3, at

that the U-bends point in different directions,

Figure 5 several seasons of the type as shown in Figure 3

are shown, clamped in a common frame, and

Figure 6 shows a bobbin on which a wire staggered strand

is wound up.

The small parts 1 to 6 from Figures 1, 2, 3 and 5 are made of aluminum and each have a pocket, for example the pockets 7, 8, 9, 10, on. The small part 1 is a piece of pipe, the inside of which is the pocket 7. The small parts 5 and 6 are also pieces of pipe. The small parts 2, 3 and 4 have an open rectangular profile, whose profile interior serves as a pocket 8, 9, 10. In the pockets you can squeeze one of a springy, tight fit Wire 11 to 16 bent U-bend, for example the U-bends 17, 18, 19, 20. The U-bends are, as now for the U-bend 20 explained, shaped with splayed legs 21, 22, in such a way that the legs 21, 22 relieved as in FIG Include small acute angles of spread 23 of about 5 to 15 ° with one another.

The U-bend 20 is dimensioned with reference to the associated pocket 10 so that it can with light compression of the legs 21, 22 fits into the associated pocket 10, as indicated in Figure 3 by dash-dotted lines. The dash-dotted ones Lines 24, 25 identify the extension of the clear width of the pocket 10 and the dash-dotted lines 26, 27 identify the position of the legs 21, 22 within the pocket 10. The legs 21, 22 are not up to parallel in the pocket,

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but only compressed onto an acute angle bracket 28. The holding bracket 28 is smaller than the spreading angle 23, preferably about 1/5 to 3/5 of the angle of spread.

The relay shown in Figure 3, generally designated 30 consists of a wire 13, the serpentine to successive U-bends 20, 31, 32, 33, 34, 35 are bent. The U-bends extend in a common arch plane, with the plane of the drawing of Figure 3 coincides, and are alternating open on opposite sides. The U-bends 20, 32 are open to the left in relation to FIG. 3 and the U-bends 31, 33, 35 are open to the right. Adjacent U-bends each have one leg in common, for example the U-bends 20 and 31 have the leg 22 in common. You can go on all U-bends. Stuck small parts. Then you can only use the respective U-bends up to about half their length. His better ones A seat is achieved if you leave out a U-bend between two small parts and the small parts, for example, only on the one behind U-bends pointing to one side is stuck, so for example in FIG. 3 on the U-bends 31, 33 and 35 By compressing the legs, a curvature of the central axis 37 corresponds to the curved line 38. The line 38 is drawn somewhat exaggeratedly curved for the sake of clarity. Man can prevent this curvature by clamping the relay at the top and bottom, as will be explained further below with reference to FIG will.

The U-bends of season 30 are all shaped identically to each other, namely with an arc length according to double arrow 40 of 5 cm and an outer arc width at the level of the central axis 37 according to double arrow 41 of 1 cm, based on the unloaded arches. With these dimensions, a spread angle is recommended 23 of 10 °. such U-bends are then preferably suitable for Pockets with a clear Veite according to double arrow 42, which lead to a bracket 28 of about 5 ° when completely pushed open Small part leads. With these dimensions, a wire thickness of 4 mm (millimiters) with a circular wire cross-section is recommended.

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P 32 704

Changes to the scale 30 from FIG. 3 are listed in the table below. D5.ese amendments distinguish compared to season 30 only through the information from this table.

TABEL

Execution
example Figure 3 From and
1 eration
2 3 Material of
Wire 13 Hard
aluminum Bisen lupfer Hard
aluminum Strength of
Wire 13 4 mm 6 mm 6 mm 4 mm Bow length like »
Double arrow 40 50 mm 80 mm 60 mm 100 mm Sheet width according to
Double arrow 41 20 mm 35 mm 25 mm 20 mm Spreading angle
according to double
arrow 23 10 ° 15 ° 18 ° 12 ° Bracket
according to double
arrow 28 5 ° ± 3 ° 7 ° i 5 ° 9 ° ± 6 ° 5 ° ± 3 ° reserved for
Small parts aluminum iron iron aluminum

The modification 3 of the table is also used for anodizing and the modifications 1 and 2 are used for electroplating or electrolytic Shine. All embodiments, i.e. those according to the figure 3 and amendments 1 to 3, can also be used for other applications serve purposes, for example for spraying paint or paint with the support of an electric field.

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In the exemplary embodiment according to FIG. 4, the wire 14 is closed successive U-bends 50 to 60 bent. The U-bends 50, 52, 54, 56, 58, 60 are dimensioned the same as the U-bends 20, 31, 33, 35 from Figure 3 and extend, each for itself, with a horizontal stagger in a vertical arc plane. The successive U-bends 50, 52, 54, 56, 58, 60 but in contrast to Figure 3 protrude in different circumferential directions, based on the direction of view according to arrow 61, different times of the day can be assigned, namely the U-bend 50 3:00 p.m., the U-bend 52 4:00 p.m., the U-bend 54 5:00 p.m., the U-bend 56 6:00 a.m., the U-bend 58 7 οο a.m. and the U-bend 60 8:00 a.m. and so on for other U-bends that are not shown.

The intermediate U-bends 51, 53, 55, 57, 59 extend in an inclined arc plane and can otherwise be the same be shaped like the U-bends 22, 32, 34 from FIG. 3. Preferably small parts are only placed on the U-bends 50, 52, 54, 56, 58, 60, while the other U-bends remain unused.

In FIG. 5, several tiers 70 to 72 are shown, each of which is designed in the same way as tier 30 from FIG fastened with their respective upper ends in the upper frame strip 77 and with their respective lower ends in the lower frame strip 78. The arc planes of the graduation, for example the arc plane of the graduation 70 indicated by the dash-dotted line 79, extend plane-parallel to one another and are ^N in the exemplary embodiment perpendicular to the plane of the frame 76.

The squadrons from Figures 3 and 4 are drawn and broken off can have many more arcs than shown in the figures. You can also make wire staggered strands that are very have many seasons in a row, of which you can then join Can cut the relay lengths as required. For storage and for Such a wire staggered strand 8i can be transported on a bobbin 80 rolled up. If this is a wire harness acts whose U-bends lie in one plane, recommends

it is to undertake the winding up in such a way that the U-bends are each curved about an axis of curvature parallel to the plane of the sheet.

When handling, the relays are preferably hanging with the
the part shown above in the relevant figure is arranged above and the part shown below in the relevant figure is arranged below. '

Claims (10)

-j J .. ':' .. ·.:. ρ 32 704 Patent claims: Ρ \ λ Staffel for holding small parts provided with a pocket with electrical contact when surface treatment using an electric field with projections for the individual pockets, which are arranged according to the size of the associated small parts at a distance on the relay, characterized in that the U-elbow protrusions (20) a resilient wire (13), the legs (21, 22) of which each open inde with a small acute angle of spread (23) are spread and with compression of their U-bends in an associated pocket (10) fit. 2. Relay according to claim 1, characterized in that the U-bends (20) pressed together on an acute angle bracket (28) »which is smaller than the angle of spread () fit tightly into an associated pocket (10). 3. Relay according to claim 1 or 2, characterized in that it consists of a continuous wire (13) which serpentine to alternate to opposite Pages aligned U-arcs (20, 31) is curved. 4. Relay according to claim 3 »characterized in that the U-bends (20, 32) aligned on one side with one another are shaped identically. 5. Relay according to claim 3, characterized in that all U-bends (20, 31, 32.) are shaped identically to one another. 6. Relay according to one of claims 3 to 5, characterized in that that the U-bends (20, 31 · ..) extend in a common arc plane (FIG. 3). ·. * «Β β 9 ο 7. Relay according to one of the preceding claims, in particular claim 3, characterized in that several wire relay lengths (70 ...), whose U-bends each extend in a common arch plane (79), related to their arch planes plane-parallel next to one another and related to their longitudinal extension vertically and at a distance from one another are suspended from a common relay beam (77). 8. Relay according to claim 7, characterized in that the Wire stagger lengths (70 ...) are enclosed in a common staggered frame (76) by using their respective upper ends on the upper frame strip serving as a relay beam (77) and with their lower ends on a lower frame strip (78) are attached. 9. Relay according to one of Claims 1 to 6, characterized in that that a wire staggered strand (81) from several formed from a common, continuous wire, lined up Staggered lengths, the U-bends of which extend in a common arc plane, is rolled onto a storage bobbin, the U-bends over an axis of curvature are curved parallel to the respective arc plane. 10. Relay according to one of the preceding claims, characterized in that » that for the anodization of small aluminum parts the resilient wire is a hard-drawn aluminum wire.