DE102007060432B4 - wire coil - Google Patents

Abstract

Wire spool, in particular for holding saw wire in wire sawing, consisting of a bobbin with at least one flange (2, 3) of a bobbin end face, wherein
the coil body has a transverse distribution such that a cylindrical coil core (4) is surrounded by a cylindrical coil shell (5) possessing elastic properties in the radial direction, the coil shell (5) comprising segments which bear against the coil core (4),
characterized in that
the coil core (4) is rigid and has a cylindrical shape with a conical outer contour, wherein
the coil casing (5) has a hollow cylindrical shape with a conical inner contour, the conical inner contour has a cone angle which is complementary to the cone angle of the outer contour of the coil core (4)
the bobbin case (5) has a plurality of slots (6) oriented in the coil longitudinal axis direction, and
is formed of a plurality of fins (7) and
at least over sections of the outer circumference of the bobbin cover (5) a wear body (8) is located and
the respective wear body (8) playable ...

Description

The The invention relates to a wire spool, in particular for receiving saw wire when wire sawing, consisting of a bobbin with at least one flange on a bobbin front side, wherein the bobbin a Cross distribution has such that a cylindrical coil core of having elastic properties in the radial direction cylindrical bobbin case is enclosed, wherein the coil cover comprises segments, which rest against the spool core, according to the generic term of claim 1

From the DE 699 08 788 T2 a wire saw machine is known which is suitable for cutting blanks of semiconductor material. In this known wire saw machine, the wire is guided from a spool by rollers or rollers to the so-called Nutenwalzen. The sawing wire located in the grooves then comes into contact with the surface of the blank to be treated. Due to a reciprocating movement of the saw wire, an abrasive machining step relative to the blank takes place. The wire then passes to a take-up spool. In addition to a known simple unwinding and winding of the wire is also possible to move the wire bidirectional. In order to cut the blank under stable conditions, it is necessary to let a defined tensile stress act. The tensile stress can be generated by a pendulum roller, the z. B. is in communication with a balance weight. In a bidirectional operation of a wire saw machine, there is a risk of undesired increasing tensile forces, resulting in a wire tear. The effort to remove broken wire and clamp a new wire is significant, resulting in a reduction in the productivity of a corresponding machine.

The lesson after DE 33 12 178 A1 discloses a spool which is formed by two spool parts with mutually displaceable and latchable in different relative axial positions hub parts, each of which carries a flange. The hub parts, ie both the inner and the outer hub part are provided with elastic properties. Each of the coil parts consists of two matching trained and extending over each 180 ° halves, which are interconnected along an axial plane. In this way, the width of the coil is adapted to the respective requirements. The halves of the coil halves can be stacked space saving after loosening. In the superimposed hub parts it comes to a lock, whereby the winding material is blocked. The very firm winding of the winding material on the coil leads to considerable difficulties in separating the winding material from the coil.

In the method for winding the saw wire of a wire saw in an oscillating operation on a receiver coil according to DE 198 28 420 B4 the tension of the saw wire is reduced before winding onto the receiver coil. It has been shown that is subject to the tension with each turn, the axial pressure on the bobbin an increase. For example, the pressure on the bobbin adds up to about 100 t, when about 100 km saw wire wound with a tensile stress of 25 N. Therefore, the receiver coil must be designed to withstand these mechanical stresses. In turn, this results in high costs in the production of the receiver coil and it is limited the usable saw wire length. Furthermore, the very firm winding of the saw wire on the receiver coil leads to considerable difficulties in separating the amount of wire from the coil.

As usual the coils for receiving the unwound and used wire with wire saws for one Reuse are designed, it is necessary to rewind the wire Termination of the cutting or sawing process remove from the bobbin to prepare the bobbin for its next use.

Especially Here is the wire removal at just running coils very expensive. The wire removal from the bobbin carried out by means of cutting machine under considerable noise and dust. Furthermore consists in such an operation of the removal of the wire the danger of the bobbin is subject to damage.

Out The above, it is therefore an object of the invention, a further developed Wire coil, in particular for receiving saw wire during wire sawing, on the one hand all mechanical loads in the case of use over a longer period of time readily resists and with the help of which the removal of the wound up consumed wire material done in a particularly easy manner can. In particular, should in a transversely divided arrangement of the bobbin, the Arrangement be separated with a full wrap.

The solution The object of the invention is carried out with the combination of features Claim 1, wherein the dependent claims at least expedient embodiments and represent further education.

It is therefore of a wire coil, in particular for receiving saw wire when wire sawing, consisting of a bobbin with at least one mounting flange on a bobbin front side went out.

Of the bobbins is divided in the transverse direction such that a rigid coil core enclosed by a radially elastic properties possessed coil cover is. The bobbin case includes segments that rest against the spool core in the assembled state support the two-part wire coil.

It It should be noted at this point that according to the present invention the wire coil is particularly suitable for receiving saw wire, however includes this does not matter in areas where it is wires, threads or the same materials for completely other applications, such. In the textile industry.

According to the preferred know monolithic coil core a cylindrical shape with conical outer contour on.

The coil cover has a substantially hollow cylindrical shape with a conical inner contour.

The conical inner contour has a cone angle, which is the cone angle the outer contour the bobbin complementary is.

Of the entire bobbin receives its operational stability according to the invention by that the monolithic coil core in the radially elastic Properties owning bobbin case used being, being core and shell can be screwed together.

For this has the bobbin case a plurality of in the coil longitudinal axis direction oriented slots.

Especially is the bobbin case from a variety of themselves in the longitudinal axis direction formed slats.

Of Further, according to the invention over sections the outer circumference the bobbin case arranged a wear body. Also conceivable is the formation of a wear layer.

Of the Wear body is movable on the bobbin case solvable attached.

The Slats have at their outside end a greater thickness and / or width based on that provided for the introduction of the spool core inside end up.

Either the bobbin and the bobbin case have a mounting flange, wherein the flanges a through hole for the aforementioned bracing from coil core and coil cover have.

For example On each lamella a strip-shaped wear body is moved play and solvable attached. Through the game is the desired movement of the lamella in the radial direction when removing the bobbin not hindered.

At the flanges fasteners are provided, wherein over the Fastener tensile forces can be brought to act to separate the bobbin from the bobbin case.

Summarized there is the coil of the invention made of separable parts, which are used to extract and remove the picked up Wire detachable from each other are, so that ultimately the wire extraction according to the task of Invention is facilitated.

The Coil comprises at least two individual assemblies, namely spool core and bobbin case, wherein the coils are stiff and rigid and the coil cover are made compliant. Both parts are ready for use when assembled bobbins represents.

Of the Coil core is embedded in the assembled state in the coil shell part, wherein externally of z. B. made of steel Spulenhüllenteils aluminum plates attachable as a wear body are.

At the Pulling apart of the two parts of the bobbin gives the bobbin case below the pressure of the amount of wire after, d. H. It finds a radial here inside oriented bending process instead. As a result of this bending process can then the wire reel removed without further effort from the bobbin case become.

The Invention will be described below with reference to an embodiment and below With the help of figures closer explained become.

in this connection demonstrate:

1 a side view of the wire coil according to the invention in the assembled state;

2 a 3-D partial sectional view of the wire coil according to 1 ;

3 a longitudinal section of the wire coil with not yet fully inserted bobbin relative to the bobbin cover;

4 different views of the coil cover with slats and

5 different views and a 3-D longitudinal section of the bobbin.

The wire coil according to the invention for receiving saw wire, which is used in particular in the wire sawing of semiconductor materials, in particular so-called ingots for the solar industry, has a first, upper flange 2 and a first flange 2 opposite second, lower flange 3 on. The bobbin has a transverse distribution, as in particular in the 3 is apparent.

This transverse distribution comprises a coil core 4 , The coil core 4 exists z. B. of a steel material of suitable hardness.

Furthermore, a coil cover 5 intended.

The outer dimensions of the spool core 4 are on the clear inside dimensions of the bobbin case 5 adapted so that the coil core 4 in the inner part of the bobbin case 5 can be inserted and tightened.

The bobbin case 5 has a lot of in the longitudinal axis direction of the wire coil 1 oriented slots 6 on.

The slots 6 are, as in the 4 becomes clear at the flange 3 open opposite side, whereby circumferentially spaced a plurality of fins 7 results.

These slats 7 are essentially radially elastic in movement. The thickness of the slats 7 reduces starting from the side of the flange 3 upwards, to the opening end, by an inside conical shape.

This internal conical shape is complementary to the outer cone of the spool core 4 Gradient.

When the coil core 4 in the bobbin case 5 is inserted, the individual slats are based 7 on the bobbin surface, so that a load bearing and a voltage dissipation when winding the wire in the desired manner is possible.

On the outer surface of the slats 7 are wearing bodies 8th applicable, which have an outer contour, which is substantially the shape of the slats 7 equivalent.

So that the wear body 8th the movement of the relevant slats 7 can follow in the radial direction is a game attachment using a slot 9 prefers.

About fasteners 10 , z. B. in the form of holes that are on or in the flanges 2 and 3 can, on the one hand, the relevant wire coil 1 be attached in the wire saw and it is on the other an effect of tensile forces for separating coil core 4 and bobbin case 5 possible.

The flanges 2 and 3 each have a through hole 11 , The through hole 11 serves to accommodate means for clamping the spool core 4 with the bobbin case 5 (Not shown).

One in the flange 2 of the spool core 4 located circumferential groove 12 acts as a centering shot for the open end 13 the wreath of lamellae 7 , which further increases the stability of the overall assembly in the assembled state.

The wear bodies 8th can be made of aluminum or heavy-duty plastic material, the coil core 4 and the remaining components of the bobbin case 5 Made of steel.

The connection of the wear bodies 8th with the respective slats 7 Can be done by screwing, which is essential for the use alone, that the possibility exists, the wear body 8th remove and replace with technologically simple measures.

As already explained, when pulling the bobbin of the wire coil, the bobbin cover 5 the compliant element. That is, it will be the slats 7 when separating the coil parts taken from their support with the result that a radial deflection occurs inward. Due to the deformation of the coil cover caused thereby 5 The wire wrap can be easily removed by pulling in the longitudinal direction.

Through the functional separation spool core 4 / Spool enclosing 5 are damage to the spool core 4 almost impossible. Regardless of the life of the bobbin case 5 can the spool core 4 be used several times.

With the help of fasteners 10 can spool core 4 and bobbin case 5 be separated by the action of tensile force, the spool core forming the coil top 4 is stored as a result of the separation. When the bobbin case 5 , That is, the lower coil part, is clamped on a special tilting table, can by a Abkippbewegung the position of the bobbin case 5 be changed, so that the wire coil automatically from the bobbin case 5 slips off and falls into a waiting container.

After return movement of the tilting table top in the starting position can repairs or replacement of worn parts on the bobbin case 5 be made. After the koni spool core 4 as coil top again above the bobbin case 5 is positioned, this can in the conical-hollow cylindrical opening of the bobbin case 5 slip in, with a self-adjustment by the conical surfaces.

After tension is then the wire coil 1 available for reuse.

All in all, it is possible with the wire coil according to the invention 1 To significantly reduce the time required to remove a spent, picked-up wire coil, while at the same time damaging the wire coil 1 is excluded when removing the wire. By the provision of wear bodies 8th on the slats 7 the bobbin case 5 Damaged elements can be replaced and overall the life of a wire coil designed in this way 1 increase.

LIST OF REFERENCE NUMBERS

1

wire coil

2

flange

3

flange

4

Plunger

5

coil cover

6

slot

7

lamella

8th

wear body

9

Long hole

10

fastener

11

Through Hole

12

encircling groove

13

Restricted End of the lamellar rim

Claims (5)

Wire bobbin, in particular for holding saw wire in wire sawing, consisting of a bobbin with at least one flange ( 2 ; 3 ) of a bobbin end face, wherein the bobbin has a transverse distribution such that a cylindrical bobbin core ( 4 ) of a radially elastic properties possessing cylindrical coil cover ( 5 ) is enclosed, wherein the coil cover ( 5 ) Comprises segments which bear against the coil core ( 4 ), characterized in that the coil core ( 4 ) is rigid and has a cylindrical shape with conical outer contour, wherein the coil cover ( 5 ) has a hollow cylindrical shape with a conical inner contour, the conical inner contour has a cone angle which corresponds to the cone angle of the outer contour of the coil core ( 4 ) is complementary, furthermore the bobbin cover ( 5 ) a plurality of coils oriented in the coil longitudinal axis direction (US Pat. 6 ) and a plurality of fins ( 7 ) is formed and at least over portions of the outer circumference of the bobbin case ( 5 ) a wear body ( 8th ) is located and the respective wear body ( 8th ) movably on the bobbin cover ( 5 ) is releasably attached. Wire spool according to claim 1, characterized in that the slats ( 7 ) at its outer end a greater thickness and / or width relative to that for the introduction of the coil core ( 4 ) have provided inside end. Wire spool according to one of the preceding claims, characterized in that both the spool core ( 4 ) as well as the bobbin cover ( 5 ) a flange ( 2 ; 3 ), wherein the flanges ( 2 ; 3 ) a through hole or through hole ( 11 ) for clamping coil core ( 4 ) and bobbin cover ( 5 ). Wire spool according to claim 3, characterized in that on the flanges ( 2 ; 3 ) Mounting center ( 10 ) are provided. Wire spool according to claim 4, characterized in that via the fastening means ( 10 ) Tensile forces can be applied to the bobbin ( 4 ) of the bobbin case ( 5 ) to separate.

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