DE102006017815A1 - Starting component for manufacturing of saw blades or saw bands, have two carrier bands, and segments, where each segment is inserted into recesses and guided over transverse axis by two continuous parallel laser or electron beam welding - Google Patents

Abstract

The component (1) has two carrier bands (10,20) and segment (30) with a cutting material for a cutting edge of saw blade and/or saw band. The carrier bands have edges (15,25) and recesses (12,22) in each case, where the carrier bands are arranged in such a manner that the recesses face each other. Each segment (30) is inserted into the recesses and guided over the same transverse axis (18) by two continuous parallel lasers or electron beam welding aligned with both carrier bands. An independent claim is also included for a method for manufacturing a starting component of saw blades and/or saw bands.

Description

1. Field of the invention

The The present invention relates to an initial component for the production of saw blades or Saw blades.

2. Background of the invention

When Starting component for the manufacture of saw blades or saw bands with hard and wear-resistant Tooth tip areas generally become a composite steel sheet or Composite steel band (bimetal band) used. At the edge of a tough, elastic carrier tape made of steel is a strip of a cutting material welded or soldered.

There this starting component consists of different materials, it is also called bimetallic strip or bimetallic leaf known. Due to the use of, for example, tool steel or other cutting materials have the later tooth tip areas of made of saw blades or bands a higher wear resistance on and the saw blade or band achieves a higher one Lifespan.

to Production of the saw blade or -bandes is from the above-mentioned bimetallic strip a tooth profile or a tooth contour cut out according to the later saw blade or band. The resulting teeth include tip areas consisting of tool steel, with the remainder of the saw blade from the tough elastic Steel of the carrier tape consists. However, the above-described cutting the cutting contour is associated with a high loss of expensive cutting material, since the material of the cut interdental spaces is lost.

Therefore, in the EP 1 616 651 A1 proposed an output component for the production of saw blades or bands, in which individual segments are arranged from a cutting material between the edges of two carrier bands. Hereby, two saw blades or bands can be produced from one starting component by separating the starting component by the segments along the later cutting contour.

The segments EP 1 616 651 A1 are to be attached to the carrier tapes by welding, soldering or other suitable attachment or connection methods. Details of how exactly the connection of the segments can be made to the carrier bands are in the EP 1 616 651 A1 not mentioned.

The The present invention therefore has the technical task of an output component for the production of saw blades or saw bands create that is easy to produce. Continue to Output components for Saw blades or Saw bands provided which can be produced in consistently high quality. Farther is intended by the design of the starting component of the manufacturing process can be automated. After all should be a particularly cost-effective Be provided starting component.

3. Summary of the invention

These Technical objects of the present invention are the subject matter the independent one claims 1 and 9 solved. Further embodiments of the invention are the dependent claims Find.

Especially The above tasks are solved by an output component for Production of saw blades or Having saw bands a first carrier tape and a second carrier tape, and segments consisting of a cutting material for a cutting edge of saw blades or Saw bands, where the first and the second carrier tape have in each case one edge recesses, the first and the second carrier tape are arranged such that the recesses face each other, and in the recesses each one of the segments is inserted and each segment by parallel welding by means of two uninterrupted, essentially on the same transverse axis guided laser or electron beams connected to the two carrier bands is.

The Laser or electron beam welding has compared to conventional welding or brazing the advantage that only a very local limited heat input takes place in the material and thus a delay is avoided. Farther no solder required and the welding process can be automate.

By the uninterrupted laser or electron beams become piercing effects, such as punch fire prevented. Puncture effects arise in that a laser or an electron gun during the Switching on must first settle and often at the beginning of an excessively strong energy beam supplies, which can burn a hole in the material.

Furthermore, since the two laser or electron beams are guided in parallel, substantially on the same transverse axis, that is welded symmetrically to the longitudinal axis, thermally induced changes in shape are kept very low and later, only minor or no straightening operations need to be performed to straighten the output component.

By the insertion of the segments into recesses are the segments in the recesses are automatically positioned correctly and no further need Holding or clamping device for the segments are provided. The segments are preferably alone held by the carrier tapes, such a laser or electron beam welding with a continuous Ray at all be carried out first can.

Thereby, that the segments are held in recesses between the carrier tapes Need to become no between the carrier tapes further holding or clamping means are provided for the segments. If such tensioning means were present, for example in smooth Carrier tapes without Recesses, would have the welding agent be turned off when it passes over the clamping means to these not to destroy. That would be a continuous welding process not possible.

Farther can easily by applying a biasing force of Outside on the carrier tapes the for welding necessary bias between the segments and the carrier bands generated be, with the actual welding area without biasing means gets along. Due to the bias, the carrier bands are gap-free at the segments so that a clean weld will form.

Finally leave The segments are easily moved by hand or automatically into the recesses insert without the need for special precision, since preloading the carrier tapes only directly to the welding process must be done.

By the combination according to the invention easy attachment of the segments in recesses in both carrier bands and of welding me laser or Electron beams can be an output component particularly easy and reliable be manufactured and ensures a consistently high quality become.

In a first preferred embodiment the output component is in each case one of the segments by means of two continuous, to the longitudinal axis the output component of parallel welds connected to both carrier bands. In this case, by simple straight and continuous welding the output component can be made without the welding process must be interrupted. These welds can be particularly easy generate that the carrier tapes together held in the recesses cutting segments under the respective fixed welding means (a laser or electron beam) are moved through.

In an alternative preferred embodiment of the starting component is each one of the segments by means of two welds along the outer contour the segments and the recesses connected to the two carrier bands. In this case, a weld also results on the side surfaces of Segments, resulting in the carrier material inserted cutting teeth allows which are particularly well secured against breaking out. Farther becomes the power transmission later Cut on the carrier tape improved. In this case, need the welding agents only with moving carrier tapes be moved on a transverse axis.

Prefers There is an air gap between the edges of the carrier tapes. The air gap allows for a simple dosing of the biasing force between the carrier bands and the segments, causing the segments and the recesses are not overly accurate must be made. Furthermore, through the air gap, the welding means (the laser or electron beam) guided so that, despite interrupted welds, the welding agent does not have to be turned on and off in the material and thus puncture effects (e.g., holes in the material when switching on a laser) significantly reduced become.

Prefers can the segments have a greater thickness have, as the carrier tapes. This is it is possible to provide an output component that already has the required cut-free form the saw blade or bands having.

In a further preferred embodiment the recesses of the carrier bands are punched or laser-cut. By punching the recesses can be particularly economical and exactly introduced. Smaller Maßunge inaccuracies of the punching are balanced by biasing the carrier tapes. complicated Forms of the recesses are preferably produced by laser cutting, whereby in certain forms of the recesses and at suitable Tooth pitch, e.g. in the waveform described below, from a Steel band simultaneously laser cut two carrier tapes can be.

In further preferred embodiments, the segments have an oval, round, octagonal, hexagonal, rectangular, triangular, diamond or square shape. Thanks to these special shapes, the segments can be better integrated into the carrier straps and later on made cutting have a better power transmission with the carrier tape.

In a particularly preferred embodiment the recesses are provided by wavy edges of the carrier tapes. Such wavy Edges are particularly easy to punch, as they are not paragraphs or have other discontinuities and thus the punching tool has a long service life. The wavy edges can be but also particularly advantageous laser cutting. Punching or laser cutting can be done that way be that with suitable waveform with only one cut through a steel band at the same time two carrier bands arise. It arises prefers no waste.

• a. Bereitstellen eines ersten Trägerbands und eines zweiten Trägerbands, wobei das erste und das zweite Trägerband in jeweils einer Kante Aussparungen aufweisen;
• b. Anordnen des ersten und des zweiten Trägerbands derart, dass die Aussparungen einander gegenüberliegen;
• c. Bereitstellen von Segmenten bestehend aus einem Schneidwerkstoff für eine Schneide von Sägeblättern bzw. Sägebändern;
• d. Einsetzen je eines der Segmente in die gegenüberliegenden Aussparungen; und
• e. Verbinden der Segmente mit beiden Trägerbändern durch paralleles Schweißen mittels zweier, im Wesentlichen auf der gleichen Querachse geführter, ununterbrochener Laser- oder Elektronenstrahlen.

The above objects are further achieved by a method for producing a starting component of saw blades or saw bands, comprising the following steps:

• a. Providing a first carrier tape and a second carrier tape, the first and second carrier tape having recesses in each edge;
• b. Arranging the first and the second carrier tape such that the recesses face each other;
• c. Providing segments consisting of a cutting material for a cutting edge of saw blades or saw bands;
• d. Insert one each of the segments into the opposite recesses; and
• e. Connecting the segments with both carrier tapes by parallel welding by means of two, continuously on the same transverse axis guided, continuous laser or electron beams.

By the production process according to the invention the ones described above with respect to the starting component Advantages. In particular, the advantages with respect to the reduced result Distortion by the laser or electron beam welding, the reduced piercing effects due to the continuous rays, the small thermally induced changes in shape due to the parallel guide the rays, the accurate and retention-free positioning of the Segments through the recesses, the easy way a biasing force Apply and easy insertion of the segments in the recesses.

By the combination according to the invention easy attachment of the segments in recesses in both carrier bands and of welding me laser or Electron beams will be a particularly effective and surprising easy way provided an output component to manufacture, which also has a consistently high quality having.

In a preferred embodiment of the method exists between the edges of the carrier tapes Air gap and the method comprises the step of guiding the Laser or electron beams through the air gap. In which the Laser or electron steel between the segments is guided in the air gap between the carrier bands can be welded with continuous laser or electron beams, although interrupted welds necessary are.

In a further preferred embodiment the method further includes the step of pressing the carrier tapes a biasing force in the direction of the segments before connecting the segments on. As a result, the segments, despite any manufacturing tolerances, held backlash between the carrier tapes and can thus optimally welded together. In addition, how are describe above, no further holding or clamping means for the segments necessary, causing a welding is made possible with laser or electron beams in the first place.

Further preferred embodiments emerge from the dependent claims

4. Short description the accompanying drawings

The The present invention will be described with reference to the accompanying drawings Drawings illustrated preferred embodiments explained. It demonstrate:

1 a preferred embodiment of an output component according to the invention in the production with a straight-line weld line;

2 FIG. 2 is a sectional view of a preferred embodiment of an output component with a weld seam along the contour of the segments and the recesses; FIG.

3 FIG. 2 is a sectional view of a preferred embodiment of an output component with an indicated contour-near separation cut; FIG.

4 FIG. 2 is a sectional view of a preferred embodiment of an output component with an indicated rectilinear separation section; FIG.

5 : a detail representation of an output component for illustration unterschiedli cher forms of the segments; and

6 : A section of an output component with wavy edges and round segments.

5. Detailed description of the preferred embodiments

in the The following are preferred embodiments of the present invention with reference to the figures in detail explained.

1 shows an output component 1 for the simultaneous production of two saw blades or saw bands. The starting component 1 includes two carrier tapes 10 . 20 and segments arranged therebetween 30 from a cutting material.

As shown, the segments have 30 a rectangular cross section. However, they can have any other shapes, such as hexagonal or octagonal shapes that fit well into recesses.

The carrier tapes 10 . 20 have facing edges 15 . 25 regularly arranged recesses 12 . 22 on, in their dimensions and in their forms, the segments to be inserted into them 30 correspond. The segments 30 should play as possible in the recesses 12 . 22 fit. The recesses 12 . 22 are preferred by punching in the carrier tapes 10 . 20 introduced, but other manufacturing methods can be used.

The recesses 12 . 22 should be in their depth in the transverse direction 18 be sized so that after inserting the segments 30 between the edges 15 . 25 the carrier tapes 10 . 20 an air gap 16 remains. The air gap facilitates, as described above, the accurate dosing of a biasing force F, which is the carrier tapes 10 . 20 for a clean weld laterally on the segments 30 should exercise.

This biasing force F is preferably via two rollers 50 applied laterally to the outer edges of the carrier tapes 10 . 20 to press. Other devices for applying this biasing force are conceivable, but it should be mentioned that by this type of bias any further clamping or holding means for holding the segments 30 can be omitted. The segments 30 are through the recesses 12 . 22 safely between the straps 10 . 20 held, even if they are passed through the carrier tapes under a welding system.

In the recesses 12 . 22 , be manually or automatically the appropriate segments 30 used as in 1 shown. Then the carrier tapes 10 . 20 and the segments held with it 30 in the direction 14 moved and moved under a welding system (not shown).

In a first in 1 embodiment shown by the welding system two parallel welds 40 and 42 pulled out the side surfaces 32 the segments 30 with the base surfaces 13 . 23 the recesses 12 . 22 weld. For this purpose, for example, two fixed laser or electron beams can be used, the beam cross-sections symbolically drawn as a circle and the reference numeral 47 were designated.

In the in 1 illustrated embodiment, the beam cross sections 47 on a line in the transverse direction 18 arranged so that the welding process in the carrier tape 10 parallel to the welding process in the carrier tape 20 takes place, whereby thermally induced changes in shape are avoided during welding.

In this type of rectilinear, continuous welding, only the side surfaces become 32 the segments 30 with the base surfaces 13 . 23 the recesses 30 welded. Therefore, should a later separation cut 60 . 62 for separating the output component be chosen so that the transition between carrier tape 10 . 20 and cutting tip only by the respective weld and not by unwelded transition areas (the faces 34 the segments 30 ).

Another embodiment of the welding process and weld seam course is symbolic in FIG 2 shown. Here are also the faces 34 the segments 30 with the carrier tapes 10 . 20 welded. The tracks 44 . 46 the laser or electron beams 47 run along the interfaces between the segments 30 and the carrier tapes 10 . 20 and enter the air space at the end of the surfaces to be welded from the material 16 between the segments 30 and the carrier tapes 10 . 20 one. This allows continuous, uninterrupted laser or electron beams to be used for welding, which need not be turned on before each area to be welded and then turned off. As a result, puncture effects of the laser or the electron beam gun are avoided in the material.

As in 2 illustrated, such beam guidance without beam breaks is only possible if the segments 30 through the recesses 12 . 22 be held and not by otherwise necessary clamping or holding means.

So that the laser or electron beams the paths shown 44 . 46 it is in the direction of 14 moving carrier tapes 10 . 20 only necessary that the laser or electron beams 47 transverse to this direction of movement 14 be distracted, as indicated by the arrows 45 is indicated.

In this embodiment according to 2 The welding operations are then also carried out symmetrically, causing distortions of the starting component 1 avoids.

After welding the segments 30 with the carrier tapes 10 . 20 , becomes the finished output component 1 possibly straightened and / or already grounded the side surfaces.

Then, as in the 3 and 4 represented, the starting component 1 along by separating cuts 60 . 62 . 64 be cut apart by two bimetallic strips 70 . 72 or 74 . 76 as starting material for saw blades or bands.

For this purpose, laser cutting systems are preferably used, which provide the desired conformal cuts 60 . 62 . 64 can perform.

In 3 are two contour-close cuts 60 . 62 indicated by the base surfaces 32 the welded segments 30 run. For such conformal cuts 60 . 62 Therefore, the procedurally simple welding process is the 1 ,

If the separation cut, for example, as in 4 must be done, also the faces of the segments 30 be welded. The welding process is suitable for this purpose 2 , Such starting components have a particularly strong connection between the segments 30 and the carrier tapes 10 . 20 on and can be used for example for stone saw bands.

In 5 are other possible segments 30 represented, which stands for the in 2 illustrated welding methods are suitable. From left to right, the segments point 30 of the 5 a diamond-shaped, isosceles hexagonal, round, isosceles octagonal and right-angled triangular shape. The shape of the segments 30 Of course, it can also be varied further, for example by unequal-sided hexagonal or octagonal cross sections. Furthermore, the segments could 30 of the 5 also be introduced rotated, for example, the diamond-shaped segment 30 be rotated by an angle so that a side surface is normal to the load direction of the subsequent cutting edge and thereby the power transmission from cutting edge to the carrier tape 10 . 20 is optimized.

6 shows an embodiment in which the carrier tapes 10 . 20 wavy edges 10 . 15 have and through the waveform recesses 12 . 22 result. In these recesses 12 . 22 can then have corresponding round or oval segments 30 be used, which should have a largest radius, the smallest radius of the recesses 12 . 22 equivalent. Due to this special shape of the edges 15 . 25 the segments center 30 in between, with a bias from the outside itself and thereby automatically take the correct position between the carrier bands 10 . 20 one.

The waveform of the edges 15 . 25 settles, as in 6 represented, preferably composed of arc segments of constant radius, which merge tangentially into each other. The waveform of the edges 15 . 25 but can also be sinusoidal, if matching segments 30 be used.

Such waveforms can be particularly good punch or laser cutting, as they, for example, in contrast to rectangular recesses of 1 have no discontinuities (corners in the shape of the edge). As a result, the punching tools (punching rollers) for a wave-shaped edge have a significantly longer service life compared with punching tools for recesses of the 1 ,

Furthermore, the waveform of the edges 15 . 25 the carrier tapes the 6 be made by punching or laser cutting such that a steel strip with the same wave cut into two corresponding carrier tapes 10 . 20 is shared without blending arises. This edge shape is therefore particularly advantageous in terms of production technology and cost.

The thickness of the (preferably produced by rolling) carrier tapes 10 . 20 is in the range of about 0.5 to 3 mm. The width of the carrier tapes 10 . 20 is chosen so that it is greater than or approximately equal to the width of the later saw blades or saw bands.

The thickness of the segments 30 may also be in the range of 0.5 to 3 mm, and their thickness may be greater than that of the carrier tapes 10 . 20 because thus saw blades or bands can be produced, which have a wider peak area for a free punch than the carrier band area.

The segments 30 can be made from HSS wire to be manufactured, based on the desired length of the segments 30 is cut to length. Other preferred materials for the segments 30 are hard metals, cermets, ie materials consisting of ceramic and metallic phases, and polycrystalline diamond (PCD). Furthermore, all other cutting materials for the production of the segments 30 suitable to be permanently with the carrier tapes 10 . 20 connect.

1

starting component

10

first carrier tape

12

recesses

13

Base surfaces of the recesses

14

movement direction the carrier tapes

15

edge

16

air gap

17

longitudinal direction

18

transversely

20

second carrier tape

22

recesses

23

Base surfaces of the recesses

25

edge

30

segments

32

faces

34

faces

40 42, 44, 46

welds

47

Beam cross section

50

roll

60 62, 64

cuts

70 72, 74, 76

bimetal strip

Claims (11)

Starting component ( 1 ) for the manufacture of saw blades or saw bands comprising: a. a first carrier tape ( 10 ) and a second carrier tape ( 20 ), and b. Segments ( 30 ) consisting of a cutting material for a cutting edge of saw blades or saw bands, wherein c. the first and the second carrier tape ( 10 . 20 ) in each case one edge ( 15 . 25 ) Recesses ( 12 . 22 ) exhibit; d. the first and the second carrier tape ( 10 . 20 ) are arranged such that the recesses ( 12 . 22 ) face each other; e. into the recesses ( 12 . 22 ) one each of the segments ( 30 ) is used; and f. every segment ( 30 ) by parallel welding by means of two uninterrupted, substantially on the same transverse axis ( 18 ) guided, laser or electron beams ( 47 ) with both carrier tapes ( 10 . 20 ) connected is. A starting component according to claim 1, wherein each of the segments ( 30 ) by means of two continuous, to the longitudinal axis ( 17 ) of the starting component ( 1 ) parallel welds ( 40 . 42 ) with both carrier tapes ( 10 . 20 ) connected is. A starting component according to claim 1, wherein each of the segments ( 30 ) by means of two welds ( 44 . 46 ) along the outer contour of the segment ( 30 ) and the recesses ( 12 . 22 ) with the two carrier tapes ( 10 . 20 ) are connected. Starting component according to one of claims 1 to 3, wherein between the edges ( 15 . 25 ) of the carrier tapes ( 10 . 20 ) an air gap ( 16 ) consists. Starting component according to one of claims 1 to 4, wherein the segments ( 30 ) have a greater thickness than the carrier tapes ( 10 . 20 ). Starting component according to one of claims 1 to 5, wherein the recesses ( 12 . 22 ) of the carrier tapes ( 10 . 20 ) are punched or laser cut. Starting component according to one of claims 1 to 6, wherein the segments ( 30 ) have an oval, round, octagonal, hexagonal, rectangular, triangular, diamond or square shape. Starting component according to one of claims 1 to 7, wherein the recesses ( 12 . 22 ) by a wavy edge ( 15 . 22 ) of the carrier tapes ( 10 . 20 ) provided. Process for the preparation of an initial component ( 1 ) of saw blades or saw bands, comprising the following steps: a. Providing a first carrier tape ( 10 ) and a second carrier tape ( 20 ), wherein the first and the second carrier tape ( 10 . 20 ) in each case one edge ( 15 . 25 ) Recesses ( 12 . 22 ) exhibit; b. Arranging the first ( 10 ) and the second carrier tape ( 20 ) such that the recesses ( 12 . 22 ) face each other; c. Deploying segments ( 30 ) consisting of a cutting material for a cutting edge of saw blades or saw bands; d. Insert one of the segments ( 30 ) in the opposite recesses ( 12 . 22 ); and e. Connecting the segments ( 30 ) with both carrier tapes ( 10 . 20 ) by parallel welding by means of two uninterrupted, substantially on the same transverse axis ( 18 ) guided, laser or electron beams ( 47 ). Method according to claim 9, wherein between the edges ( 15 . 25 ) of the carrier tapes ( 10 . 20 ) an air gap and the method comprises the step of guiding the laser or electron beams ( 47 ) through the air gap ( 16 ) having. Method according to one of claims 9 or 10, further comprising the step of pressing the carrier tapes ( 10 . 20 ) with a biasing force (F) in the direction of the segments ( 30 ) before joining the segments ( 30 ).