DE102007060432A1 - wire coil - Google Patents

Abstract

The invention relates to a wire spool, in particular for receiving saw wire in wire sawing, consisting of a bobbin with at least one mounting flange on a bobbin front side. According to the invention, the coil body has a transverse distribution in such a way that a rigid coil core is surrounded by a coil shell possessing elastic properties in the radial direction, wherein the coil shell comprises segments which are supported against the coil core.

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 fastening flange on a bobbin end face, according to the preamble 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.

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 designed for reuse with wire saws are, it is necessary to wire after completion of the cutting or Saw off the coil to remove the coil for to prepare their next assignment.

Especially Here is the wire extraction with just running coils very expensive. The wire removal takes place from the bobbin by means of cut-off machine under considerable noise and dust load. In addition, in such an operation of the Removing the wire increases the risk 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 holding saw wire in wire sawing specify, on the one hand, all mechanical loads in the application even over a longer period without further notice resists and with their help removing the wound up consumed wire material done in a particularly easy manner can.

The Solution of the object of the invention is carried out with the feature combination according to claim 1, wherein the dependent claims at least expedient Represent refinements and developments.

It is therefore of a wire coil, in particular for receiving Saw wire in wire sawing, consisting of a Spool with at least one mounting flange assumed a bobbin end face.

According to the invention the bobbin divided in the transverse direction such that a rigid coil core of a radially elastic properties owning coil cover is enclosed. 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 in particular for receiving saw wire is suitable, however, this excludes not applications in areas where there are wires, Threads or similar materials for completely other applications, such. In the textile industry.

Of the preferably monolithic coil core has a cylindrical shape with conical Outer contour on.

The Bobbin case has a substantially hollow cylindrical shape with conical inner contour.

The conical inner contour has a Ko nuswinkel on which the cone angle of the outer contour of the spool is complementary.

Of the entire bobbin receives its operational stability in that the monolithic bobbin in the radial direction elastic properties possessing bobbin case used is, with the core and shell are screwed together.

In a preferred embodiment, the bobbin cover a plurality of oriented in the coil longitudinal axis direction Slits open.

Especially is the bobbin cover of a variety of in the longitudinal axis direction formed slats.

The Slats have a larger at their outside end Thickness and / or width relative to that for the introduction of Spool core provided inside end.

Either the spool core and the bobbin case have one Mounting flange, wherein the flanges a through hole for having said clamping of core and shell.

At least over Sections of the outer circumference of the bobbin cover is a wear layer or wear body arranged.

For example On each blade, a strip-shaped wear body attached movable and detachable. Through the game is the desired movement of the lamella in the radial direction not hindered when removing the spool.

At the flanges fasteners are provided, with over the fastening means tensile forces to act are to separate the bobbin from the bobbin case.

Summarized If the coil according to the invention consists of separable Parts that are used to extract and remove the recorded Wire detachable from each other, so that ultimately the wire extraction facilitated according to the task of the invention becomes.

The Coil comprises at least two individual modules, namely Coil core and bobbin case, the core being stiff and rigid and the sheath be made compliant. Both Parts in the assembled state, the ready-to-use bobbin represents.

Of the Spool core is in the assembled state in the Spulenhüllenteil embedded, wherein the outside of the z. B. made of steel Bobbin part aluminum plates as wear body are attachable.

At the Pull apart the two parts of the bobbin there the bobbin case under the pressure of the amount of wire after, d. H. There is a radially inwardly oriented bending process instead of. As a result of this bending process can then the wire reel without further effort can be removed from the bobbin case.

The Invention will be described below with reference to an embodiment and explained in more detail with the aid of figures 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 mounting flange 2 and a first flange 2 opposite second, lower mounting 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 slits oriented in the longitudinal axis direction of the wire bobbin 6 on.

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

These lamellae 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 On the one hand, the wire coil in question can be fixed in the wire saw and, on the other hand, there is an effect of tensile forces for separating the 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 part 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 spool core and the other components of the bobbin case are 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 bobbin, the bobbin cover is 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 bobbin case caused thereby, the wire coil can be easily removed by pulling in the longitudinal direction.

By the functional separation coil core / coil cover are damage the coil core almost impossible. Regardless of the lifetime the bobbin case can be used multiple times the bobbin become.

With the help of fasteners 10 Spool core and bobbin case can be separated by the action of tensile force, the spool core forming the bobbin upper part is deposited as a result of the separation. When the bobbin cover, ie the lower bobbin part, is mounted on a special tiltable table, the position of the bobbin cover can be changed by a tilting movement so that the wire bobbin automatically slips off the bobbin cover and falls into a waiting container.

To Return movement of the tilting table top to the starting position can repair or replace worn parts be made on the bobbin case. After the conical Spool core as coil top again above the bobbin case is positioned, this can in the conical-hollow cylindrical opening slip in the bobbin case, passing through the conical Areas a self-adjustment takes place.

To Bracing is then the wire coil for the renewed Use available.

Everything in everything it succeeds with the invention Wire spool, the time taken to remove a spent, recorded To significantly shorten wire coils, while simultaneously prevents damage to the wire coil during removal of the wire is. By the provision of wear bodies on the fins of the bobbin case can be damaged Elements exchanged and overall the life of such a thing configured wire coil can be increased.

1

wire coil

2

upper flange

3

lower 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

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 69908788 T2 [0002]
• - DE 19828420 B4 [0003]

Claims (12)

Wire spool, in particular for receiving saw wire in wire sawing, consisting of a spool body with at least one fastening flange on a spool front side, characterized in that the spool body has a transverse distribution such that a rigid spool core ( 4 ) of a radially elastic properties possessed coil cover ( 5 ) is enclosed, wherein the coil cover ( 5 ) Comprises segments which bear against the coil core ( 4 ). Wire spool according to claim 1, characterized in that the spool core ( 4 ) has a cylindrical shape with conical outer contour. Wire spool according to claim 1 or 2, characterized in that the spool cover ( 5 ) has a hollow cylindrical shape with conical inner contour. Wire spool according to claim 2 and 3, characterized in that the conical inner contour has a cone angle, which the cone angle of the outer contour of the spool core ( 4 ) is complementary. Wire spool according to one of the preceding claims, characterized in that the spool cover ( 5 ) a plurality of coils oriented in the coil longitudinal axis direction (US Pat. 6 ) having. Wire spool according to one of the preceding claims, characterized in that the spool cover ( 5 ) of a plurality of lamellae ( 7 ) is formed. Wire spool according to claim 6, 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 mounting flange ( 2 ; 3 ), wherein the flanges ( 2 ; 3 ) a through hole or through hole ( 11 ) for clamping core ( 4 ) and shell ( 5 ). Wire spool according to one of the preceding claims, characterized in that at least over sections of the outer circumference of the spool cover ( 5 ) a wear layer or a wear body ( 8th ) is located. Wire spool according to claim 9, characterized in that the respective wear body ( 8th ) movably on the bobbin cover ( 5 ) is releasably attached. Wire spool according to claim 8, characterized in that on the flanges ( 2 ; 3 ) Means for fastening ( 10 ) are provided. Wire spool according to claim 11, characterized in that via the fastening means ( 10 ) Tensile forces can be applied to the bobbin ( 4 ) of the bobbin case ( 5 ) to separate.