DE2416575A1 - Method of winding soldering wire - involves using a wire bobbin held between removable cheeks of a mandrel - Google Patents

Abstract

The bobbin is held by a mandrel with at least one removable check plate, this mandrel serving to provide structural support for the bobbin during the winding, resisting axial and radial forces. The mandrel core (4) and cheeks incorporate several grooves (5, 6), with radial grooves terminating in circumferential grooves; and a bobbin comprises at least two co-axial rings (1) joined by several equally spaced 'U' pieces (2), the webs of these latter aligning parallel to the ring axis and their legs aligning radially and leg ends joining respective rings. 'U' pieces can site inside or outside the rings and are of wire of circular cross-section.

Description

Winding process for wire-shaped materials and related materials Holder and Associated Holder The present invention relates to a winding method for wire-shaped materials, as well as a non-reused holder for such Materials, in particular for use in automatic and semi-automatic welding machines used welding wire.

There are numerous types of unused holders or spools. In order to reduce the manufacturing costs as much as possible, wooden bobbins are used. Plastic- or metal spools. or those made of different materials. Through constructive Activities. e.g. by reducing the core diameter.

by lengthening the core. by weakening the flank thickness and the connectors with simultaneous local Strengthen, one tries to achieve a maximum of mechanical strength with a minimum of material expenditure to reach.

However, you soon reach a limit beyond that of the coil material either too expensive or too weak.

In the first case, the cost of the reel spoils the price of the wound product in the latter case, even the smooth use of the coil is called into question. The weak resistance to deformation, as well as the tolerances inherent in the coils endanger the proper winding, e.g. under the influence of a certain Winding speed necessary pulling force.

It often happens that the turns, especially those on the coil flanks Obviously drawn into the underlying layers because of coil irregularities will.

This, of course, causes difficulties in unwinding, which in particular the output of machines with mechanical unwinder, e.g. automatic welding machines, severely impaired.

In addition, the winding layers bend under the influence of the tensile force exerted on the winding material and thus cause additional irregularities which are detrimental to the winding and unwinding processes.

Furthermore, the destruction of the used coils depends on them Dimensions particularly difficult. The scrapping of plastic spools is special problematic, and even a simple plastic coating is sometimes enough for that To make recovering the metal core uneconomical.

After all, the cost price, especially that of the plastic reels, is relatively high.

The aim of the present invention is accordingly the ones mentioned To remedy disadvantages and a winding process for wire-shaped materials. as to propose a non-reused holder for such materials, whereby the Holder should be easy to manufacture and a real layered Should allow winding.

According to the invention, the winding method for wire-shaped Materials in that the holder used to hold the winding material so inserted into the cavity of a mandrel provided with a removable flank is that the mandrel and its two flanks limit the winding cavity and the absorb forces exerted by the wound wire-like material.

According to the invention, the not reused holder for wire-shaped materials composed of at least two ring-shaped elements that have a plurality of circumferentially distributed and radially directed bow-shaped elements connected are.

The transverse webs of these stirrups thus form the core while the radially extending flanges are only connected to the rings and depending on Alignment form the flanks of a coil or a winding basket.

Can be used around this holder for unwinders with a small mandrel diameter To make it, one attaches, fixed or detachable, an intermediate piece to the central one Has bore of the desired diameter.

All of these elements can be made of any material, the same or different Cross-section, e.g. the cross-sections can be rectangular or polygonal, however, they are preferably round and the material is phosphated iron wire.

The rings are preferably welded to the ends of the bracket and the stirrups can be directed inwards or outwards in relation to the rings, whereby inside wrapping or outside winding is made possible.

The rings usually surround the temples, i.e. they are on the outside and attached to the side of the bracket flanks.

To wind the material on a holder, e.g.

on a reel, you slide the holder in and along the for it the mandrel of the rewinder provided grooves and closes it laterally between the flanks of the mandrel into further grooves.

The wound material hardly touches the flanks of the bracket or not at all, it comes straight to the spike.

This mandrel resists the radial and lateral forces the material exerts during winding. The wire-like material can therefore not generate any forces exercise on the included holder. The winding layers remain even and the same Width, they can be firmly joined on top of each other using a neat layering technique.

The width of the mandrel middle part (measured between the inside of the flanks) corresponds to the width of the bracket in such a way that the windings are still sufficient are held together by the stirrups when the wound material is pulled from the mandrel will. The maximum lateral play is about half of the wound material diameter.

During the unwinding, the lateral forces are low and regular and allow gentle and regular unrolling.

The brackets can be realized in very different ways, e.g. as a semicircle, or in V-shape, or even in polygonal shape, what different winding products can be beneficial. However, they are preferably U-shaped.

The advantages of the proposed winding method are winding directly on the mandrel, the easy access to layer-by-layer windings and the possibility of uniform coiling on cheap holders.

The advantages of the proposed holder are its ease of manufacture and the low cost of the material used and easy scrapping after usage. (The holder can be easily compressed and used as scrap iron Selling.) For shipping, the last winding layer is tied off and the holder is in a light packaging plugged.

Since the holder is made of very little material, the entire packaging is (light packaging and holder) lighter than the usual packaging straps> which are used to secure the materials shipped without a fixed holder.

Despite its weak construction, the holder prevents clutter of the coils, and if the holder is made of metal, you can put the material on leave it rolled up on the holder in the vacuum furnace.

Finally, the central adapters allow production of the holder in large numbers.

An embodiment of the invention is shown in the attached schematic Drawings visible. FIG. 1 shows a side view, FIG. 2 shows a vertical section of the holder according to the invention. Figure 3 represents a partial Section of a holder pushed onto the mandrel of a winding machine. The figure 4 suggests a special variant.

Eight U-shaped brackets of round cross-section can be seen in FIGS. 1 and 2 (2) which are welded to two surrounding rings (1). On the figure 3 sees the flank (3) of the mandrel (4)) which can be removed) around the in the grooves (5) of the mandrel (4) to let the sliding bracket (2) # pass by. On the figure 4 are the Brackets (2) with their webs directed outwards and thus form a changing basket with a large interior.

The wire diameter of which the bracket and the rings are made e.g. 4 mm, the mandrel diameter 300 mm, the spool width 80 mm, the wound Material weighs 20 kg and the weight of the empty spool is 300 g (versus 500 9 of a corresponding plastic spool).

Claims (14)

Claims 1) winding process for wire-shaped materials, characterized in that that the holder serving for receiving the winding material is inserted into the cavity in this way a mandrel provided with a removable flank is inserted that the The mandrel and its two flanks limit the winding cavity and that of the wound absorb wire-shaped material exerted forces. 2) winding method for wire-shaped materials according to claim 11 characterized in that the mandrel used and both of its flanks grooves exhibit. 3) Not reused holder for wire-shaped materials, thereby characterized in that it consists of at least two annular elements, wherein these elements with several circumferentially distributed and radially directed bow-shaped Elements are connected. 4) Non-reused holder for wire-shaped materials, according to Claim 31 characterized in that the brackets are aligned such that its convex side points either radially inwards or radially outwards. 5) Non-reused holder for wire-shaped materials, according to claims 3-4, characterized in that the flanks are interrupted. 6) Non-reused holder for wire-shaped materials, according to claims 3-5, characterized in that the winding surface is interrupted is. 7) Non-reused holder for wire-shaped materials, according to claims 3-6, characterized in that the winding axis consists of one element that consists of the diameter of the holder to the different diameters of different Unwinder adjusts. 8) Not reused holder for wire-shaped materials. according to claims 3-7, characterized. that the cross section of the annular elements is circular. 9) Not reused holder for wire-shaped materials. according to claims 3-8, characterized in that the cross section of the bow-shaped elements is circular. 10) Not reused holder for wire-shaped materials. according to claims 3-9, characterized in that all elements consist of phosphated or thinly coated iron wire. 11) Non-reused holder for wire-shaped materials, according to the claims 3-10, characterized in that the elements by welding are interconnected. 12) Non-reused holder for wire-shaped materials, according to the claims 3-11, characterized in that the annular elements two in number and that they are fastened laterally against the two rows of temple ends are. 13) Non-reused holder for wire-shaped materials, according to claims 3-12, characterized in that it uses automatic welding machines will. 14) Non-reused holder for wire-shaped materials, according to claims 3-13, characterized in that it is on winders and on unwinders the mandrel is used which has a removable flank, is solid and has grooves. blank page