DE19929477A1 - Cutting knife has facet facing flank, basic body to which is fixed cutting strip with cutting section and edge, insertion end, groove and thrust piece - Google Patents

Abstract

The cutting knife (1) has a facet (2) opposite the flank (3) and consists of a basic body (4) on which is a cutting strip (5) possessing a cutting section (6) and edge (7). The cutting strip has an insertion end (8) facing the cutting section and detachably inserted into a matching holder-groove (9) in the basic body. The cutting strip is supported on a thrust piece (10) of the basic body against cutting force (11)

Description

The invention relates to a cutting knife according to the upper Concept of claim 1.

Such cutting knives either work after shearing principle with a fully or partially hardened top and a lower knife (e.g. in cross-cutting systems) or after the die cut principle with a full or partial ear top knife and a relatively soft surface, as before plastic material (e.g. for stacked or plan cutting machines). A very high force is exerted on the Cutting edge resp. -Edges of the cutting knife exerted there the contact contour of the cutting edge, respectively. - edges of a geome trical line is approximated and thus the pressure force spread over a very small area.

The cutting of such a shear or punch knife are subject to high loads because the material to be cut (paper or aluminum offset plates with paper liner) as a single not sawed as a sheet or as parcel goods (stacks) becomes. The cutting process is done using a more or less large pressure force vertical or inclined to Lower knife resp. to the cutting surface.

The cutting edge therefore consists of the hardest possible and resistant material. This material can be used for example hardened carbon steel, high-alloy chrome steel, HSS steel, hard metal (TCT) and even ceramic composite material his. This cutting material is very high quality and it is also expensive, for reasons of material savings  often on a base body, the cutting material bar wearing, soldered with braze.

Such a combination of cutting bar and base body set cutting knife has one of the several chamfer (s), that's a bevel on the non-remaining side of the material to be cut (e.g. paper, plastic, leather, Rubber etc.). Due to the bevels, the waste is during the cutting movement from the cutting interface well conveyed away.

On the opposite large area (e.g. when stacking cut) is the free area of the knife, below a negative angle (e.g. 1.5 °) to the 90 ° vertical movement the knife guide stands. So the knife can move during the cutting processes in both scissors and punching cut continuously free.

Even the hardest material wears out or sinks under the constant stress during the cutting process. Therefore the cutting knife must be reworked at regular intervals tet, d. H. straightened the cleaned material and the blade be sharpened by grinding. Material from the hard cutting bar and the soft body worn away. Therefore, the choice of the abrasive is through the different materials restricted. Every grinding medium must be very different for both materials Material properties should be suitable. When choosing the right abrasives, these requirements can only be compromised be met wisely.

In addition, when using and regrinding one such a cutting knife also ground the base body, d. H. consumed. This must therefore after a certain An number of regrinds can be exchanged. So that is the cutting knife including cutting bar and base body has become usable and must be disposed of.  

The manufacture of such a cutting bar and The basic body of the existing cutting knife is extremely complex and requires a high level of experience, precision and ar intensity. The base body must first be mechanically machined processed and then by brazing with the cutting ledge can be connected. Now from two different mate rialien existing cutting knife during the brazing process considerably delayed by the high temperatures required gen, and now has to be very expensive with special tools be tested.

If this judging is not careful enough and only after Carried out casually, the cutting knife warps when Regrinding for sharpening through the new material removal and may need to be addressed again.

A cutting bar is always soldered so that it wa on the side and open surface side with a thickness level in the Basic body passes over. This is the only way to have a throat for that Connection solder available; then there are also protruding ones Inhibition points for the clippings excluded.

The invention has for its object a cutting Knife of the type mentioned in such a way that a Connection of the cutting bar and base body is created on the one hand guarantee an optimal flow of force of the cutting force achieves and on the other hand regardless of the different Material properties of the cutting bar and base body, Fer cleaning, setting up, post-processing and resharpening with great precision and simplest execution allowed.

This task is solved by the characteristics of the An saying 1.

The invention creates a long knife with a change blade, which in particular also made of hard metal, ceramic or the like. can exist. The interchangeable blade can be in the form of a  Insert cassette, a knife-like flat material or a screw bar.

The invention has the advantage that the processing the different materials of the cutting bar and Base body can be done individually and especially separately. To the particularly stressed cutting bar can be removed and be completely replaced without the base body must be given up with.

This advantage is achieved in that the invention on a material connection between the cutting bar and basic body dispensed on the one hand; on the other hand are at the same time base body and cutting bar so together connected that the cutting knife overall the necessary Has stability and rigidity.

For this purpose, the cutting bar with a cutting edge cut opposite insertion end detachably into a cor responding receiving groove of the base body inserted. The Cutting bar is thus at least in the cutting section on the one hand and the plug-in end on the other hand in terms of width divided. The cutting bar can only be made from the Cutting section and the insertion end exist. Then gren zen the two sections directly together. With the one plugging is the width section of the cutting bar meant that can be inserted into the receiving groove. It can also be several plug-ins at the plug-in end act elements, for example in the longitudinal direction of the Cutting bar can be arranged offset.

The insertion end can be detached in a corresponding manner Inserting groove of the base body inserted. The recording groove is a longitudinal groove. The groove is for example in the Basic body milled. If the base body is cast, the groove can also be molded during casting.  

The receiving groove thus corresponds to the insertion end far than the insertion end with a tight fit in the groove inserted, d. H. be at least partially submerged in it can. The insertion end is thus immersed so far in the recording only that both opposite broad sides of the one stuck from a groove wall or flank or a ent speaking groove geometry are supported laterally.

This will insert the insertion end in the groove supported free of play and tilt play, in particular tilt-free with regard to the tilting about a longitudinal axis the knife or the cutting bar. Free of play means in this context, that none or just a ge There is little play that with the considerable forces that occur under the cutting process, the cutting bar and there with the cutting edge not or only insignificantly from it Cutting position is deflected.

Here is the insertion end and thus the cutting bar releasably arranged in the receiving groove. The insertion end can with holding means that are inserted and removed again can be attached in the receiving groove. Therefor come, for example, pin locks or screws dress. This will be discussed in more detail later.

The insertion end can be used without destruction or damage the body and the cutting bar itself from the recording menu and then the cutting bar can be removed.

The function of the knife is always guaranteed in particular, the knife against the cutting force on one Support of the base body supported. The stop of the reason body absorbs the cutting force and passes it on to the Basic body further. The attack is accordingly strong increase, so that it can absorb the large cutting force suitable is.  

Essentially opposed to the cutting force teten direction of force is so inserted that the cutting bar does not fall out of the groove can. The fallout protection is so strong that even slight to moderate pull in the opposite direction of the cut Do not force the cutting bar out of the slot occurs. However, these tensile forces are always much lower than the cutting force to be exerted. The fall protection must so not necessarily the strength of the attack for the force flow of cutting force.

Due to the non-material connection of the components ten there is the advantage that due to changes in the Ambient conditions no stresses occur in the material In the case of a cohesive connection, one is, for example different thermal expansion of cutting bar and base body disadvantageous: Due to the different thermal expansion tensions and mate are then practically unavoidable rial errors at the connection point and warpage in the Mate rial of the bodies involved themselves.

This does not occur with the invention. Because on the Material closure is dispensed with here. The invention has recognized that only by renouncing the cohesion due to the different properties of the materials can be avoided. These restrictions were previously considerable, especially considering the necessary hardness soldering process to connect the two parts. That braze The process is completely eliminated in the invention. So it will one procedural step saved. But savings are also made the associated work and impairments, näm Lich straightening the knife several times and warping or the stress cracks of the two materials at the joint location.

The base body can be reused as often as it is not subject to wear during use. Nevertheless, it should consist of a tough tempering steel with a material strength of approx. 1200 N / mm ² , so that it can withstand the multiple use of the pressure / force transmission that comes from the machine's own knife carrier with certainty. However, the cutting edge of the cutting bar is loaded. This can be regrinded, reworked and straightened separately from the base body. The machining processes and tools are then only to be matched to one material. This has also posed major problems in the prior art, all of which have been eliminated by the invention. Because the separate processing means that only one material per processing step can be used.

If the cutting bar is made of hard metal (TCT), so who the grinding and bandage intended for sharpening medium chosen. If necessary, in the manufacture of Contours and breakthroughs use the laser cutting process be det. This also applies to other hardened ones Cutting bar materials.

If the cutting bar should be defective or is so worn that they are no longer used can, can be loosened, removed and replaced by a new blade to be replaced in the corresponding slot of the Base body can be used. The basic body must be there at not be replaced. This means a significant one Cost, labor and energy savings in manufacturing, but also when maintaining a cutting knife. Besides, can to a thickness level - as described in the prior art - to be dispensed with.

Preferred embodiments of the present invention are described in the subclaims.

An exclusively positive and / or non-positive Hal the cutting bar in the receiving groove guaranteed easy removability, but also easy on can be placed without damage to the cutting bar and / or base body would be feared. In addition to the above  and the following mounting options is also conceivable, one provide an undercut groove in which the on inserted with a corresponding rear grip sets or is inserted from the side. The rear handle ensures a fluid holder, at least in Direction against the cutting force. The insertion end should but also in the direction of thickness and lengthways device of the knife. Preferably the knife held practically immovable or free of play.

The side and tilt play clearance is automatically ge ensures if the insertion end with transition fit or fit more closely to the receiving groove with respect to its thickness is. Then the plug-in end is not from behind attacked. The insertion end sits with the side clearance mentioned transition fit (for example accordingly H7 / h6) in the slot. This is the side or tilt game excluded or limited. This game is for one conventional cutting knife not annoying.

The insertion end then sits in the manner mentioned free of play between the two side walls of the receptacle nut.

The insertion end can be opposite the cutting bar be reduced in thickness and tapered. This configuration offers the advantage of a large, continuous Surface contact of the cutting bar and base body. Thereby the cutting bar is extensively abge on the base body supports.

For example, the paragraph can consist of one on both Large areas of existing thickness level exist. Then too the resulting edges are always rectangular and trained stable.

The thickness of the cutting bar can be in widths seen in the direction of the cutting section of the  Cutting bar or in a rectangular section Start behind the cutting section.

Around a joint on the outer large surface between the cutting bar and body to avoid is additionally pre- suggest that the thickness step with its step surfaces on ent speaking counter surfaces of the base body is supported. The Inserting end then preferably does not strike at the bottom of the Slot to avoid double fitting. Then it will be the stop only by the outer stop between Thickness level of the cutting bar and corresponding counter surface given the basic body. This is the outer parting line between cutting bar and base body with minimal joints width. This ensures an unimpaired cutting edge function without the cutting knife with joints or forwards jumps on the material to be cut.

Alternatively, it is preferably proposed that the Inserting end has a rectangular cross section and paragraph passes into the cutting section, and that the Cutting section in the stop position of the cutting bar with a wading share and an open space share from the Recording groove protrudes. The insertion end is then cut on the side without thickness step into the cutting section. The Cutting section protrudes from the receiving groove. He is part of the cutting knife, that part of the cutting ledge, the one edge and an opposite open area or forms part of the same. With this configuration the wad portion preferably goes smoothly into a corresponding one Wade percentage of the basic body or in the basic body. The same applies to the free area portion of the cutting edge cut the cutting bar.

This has the advantage that on both large areas of the Cutting blade the most heavily used wading component and the free space portion from the material of the cutting bar exposed and claimed. At the same time, the rectangular cross-section - depending on the width of the recessed  Section of the insertion end - a great freedom of tilt play and given support by side walls of the receiving groove. With a larger width of the recessed section is namely at constant side play the tilt game accordingly wrestles.

It is preferably proposed that the wading portion and / or the open space portion with the corresponding portion of the base body a common bevel and / or a common Form / forms same open space.

A direct, i.e. H. undirected power flow the cut force from the cutting edge to the base body ensures that the receiving groove has a depth stop points. The depth stop can be done through the recording utbo which are formed.

It is preferred, however, that the depth stop is deep is adjustable. Then the depth stop is by example given depth stops attached to the body. This can, for example, studs of different lengths his. This allows the always available delivery reserve Cutting bar, that is the length with which the insertion end in immerses the receiving groove, be optimally used.

When regrinding the total width of the cutting perform less. By means of the adjustable depth stops can the remaining width after regrinding the cutting bar can be optimally adjusted. After every Regrinding the depth stop can be adjusted so that an optimal fit and a minimal joint between cutting bar, d. H. Open space share and wading share the cutting bar, and the base body is given.

It is proposed that the depth stop of a threaded shaft is formed, the screw engagement of a rear screw engagement recess of the base body is accessible.  

A possibly existing tilt game around the across Large surface of the cutting knife standing axis can thereby be compensated for that several depth stops are provided are, the envelope of the stop position of the cutting bar specifies. The envelope is the connecting link never or the connecting surface of the individual support points of the insertion end on the depth stops.

The insertion end can be - especially flexible - Retaining element forced into the receiving groove to prevent it from falling out his. Above all, there is no flexible holding element hardening plastic in question, which also under the mechani maintains its flexibility.

Alternatively, the insertion end can also be with clips or Locking pins and other locking devices in the receptacle menut be held so that the cutting bar does not come out can fall.

The advantages of the invention then come in particular Wear when the cutting knife works according to the scissors principle tet and if an upper knife and a lower knife are provided are, both of which correspond to one of claims 1 to 11 are trained accordingly.

The invention is illustrated on the basis of the figures th exemplary embodiments explained in more detail. Show it:

Fig. 1 shows a cross section through a cutter according to the invention,

FIG as indicated. 1a shows a detail of Fig. 1 there with 1 a,

FIG. 1b shows a corresponding detail view of an embodiment with Vorwate,

Fig. 2 is a longitudinal section through the Ausführungsbei game of FIG. 1 along the line II-II,

Fig. 3 shows a cross section through an inventive undercutter

Fig. 4 seen a plan view of the embodiment of Fig. 3 in the direction of arrow IV,

Fig. 5 shows a cross section through a further example of a guide from the lower knife with intermediate strip,

Fig. 6 shows a cross section through a further example from guide a cutting blade according to the invention with stepped shank,

Fig. 7 shows a cross section through a further embodiment, for example, with a bound tip of the basic body.

Unless otherwise stated below, refer all reference numbers always refer to all figures.

Figures show a cutting knife 1 with a bevel 2 and an open surface 3 opposite the bevel 2 . The cutting knife 1 consists of a base body 4 , on which a cutting bar 5 is attached, which has a cutting section 6 with a cutting edge 7 .

The cutting bar 5 is detachably inserted with an insertion end 8 in a corresponding receiving groove 9 of the base body 4 . The insertion end 8 is the cutting section 6 of the cutting bar 5 opposite.

The tolerance in the thickness direction 13 of the receiving groove 9 is be measured with respect to the thickness 12 of the insertion end 5 such that the insertion end 5 is fitted with a transition fit.

As a result, the cutting bar 5 is held in the receiving groove 9 without side play and without tilt play. The cutting bar 5 is only positively held in the receiving groove 9 . In addition, there is a flexible holding element 20 which sits in a longitudinal groove of the base body and which secures the insertion end 8 in the receiving groove 9 against falling out. This is done by pressing the insertion end 8 . The flexible retaining element 20 may, for example, a flexible, thin plastic or sealing tape to be that at pressing in the insertion of the 8 deforms elastically in the receiving groove 9 and a plug-in end secures 8 frictionally against falling out of the receiving groove 9 by the elastic deformation.

The cutting forces 11 transmitted to the cutting bar 5 via a cutting edge 7 are supported on a stop 10 of the base body 4 .

The insertion end 8 has a rectangular cross-section. There is a step into a cutting section 6 . In the stop position shown, the cutting section 6 of the cutting bar 5 protrudes from the receiving groove 9 . The protruding areas form a wading portion 15 and an open space portion 16 : The wading portion 15 and the open area portion 16 form a common wading 2 and a common open area 3 with the base body 4 , each with step-free transitions.

This means that only the hard metal material (TCT) resp. the cutting bar material the wear forces at Cut exposed due to the cutting edge made of hard metal mate rial (TCT) and on both sides of the cutting edge carbide Ma material (TCT) is exposed.

Dash-dotted line shows the contour of the cutting section 6 before post-processing. It was mainly, preferably exclusively hard metal material (TCT) of the cutting bar 5 removed by grinding.

The cutting bar 5 is inserted with its insertion end 8 into the receiving groove 9 such that the center surface 23 of the cutting edge 7 is inclined at an angle with respect to the free surface 3 that is smaller than the wading angle 43 . As a result, the wading portion 15 of the cutting section 6 is equal to the corresponding wading portion of the base body 4 , so that a completely smooth wading is formed overall. The same applies accordingly to the open space portion 16 .

This creates on both sides of the receiving groove 9 towards the cutting edge tapered webs of the base body 4 , which taper so far that smooth transitions between the base body 4 and the cutting bar 5 are given on both sides.

Due to the rectangular contour of the insertion end 8 , the thickness 12 of the insertion end is constant over the entire insertion length. It corresponds to the specified thickness 13 of the cutting bar 5 .

The depth stop 10 is formed by a threaded shaft 17 which is screwed into a corresponding threaded hole 40 of the base body 4 . The continuous threaded hole 40 extends from a screwing 19 of the base body 4 starting from the receiving groove 9 and breaks through the bottom of the receiving groove 9 . The Tiefenan impact 10 , which is formed by the lower end of the threaded shaft 17 , is thus adjustable in accordance with the screwed-in position of the threaded shaft 17 . This means that the entire delivery reserve can be used. The delivery reserve is limited by the length of the threaded hole 40 or the threaded shaft 17th The upper limit of the delivery reserve is slightly smaller than the width of the insertion end 8 .

At the same time, the screw engagement 18 of the threaded shaft 17 is accessible through the screw engagement recess 19 . In order to facilitate handling, a countersunk thread engagement, for example an Allen key, is provided.

The threaded shaft 17 is pin 32 by a counter thread, which is screwed into the threaded hole 40 above the threaded shaft 17 , countered and thus secured against displacement ge. This is advantageous in view of the high cutting forces that occur.

The cutting force 11 , which is exerted on the cutting edge 7 , is abgetra again in the figure on the stop 10. There, the cutting force is transmitted via the thread of the threaded shaft 17 to the base body.

The screw engagement recess 19 is introduced into the watenseiti large surface of the cutting knife 1 , for example milled out. The screw engagement recess 19 ensures easy access and thus adjustability of the depth stop 10 .

Fig. 1a shows the detail marked in Fig. 1 with Ia. The wading-side parting line 25 or the open-space parting line 26 is shown there. These lie between the tip of the two sides of the receiving groove, the tapered webs of the base body 4 and the transition from the insertion end 8 of the cutting bar 5 and the cutting section 6 of the cutting bar 5 .

In addition, Fig. 7 shows a supplementary presen- tation, in which the tapered webs of the base body, which include the cutting bar 5 between them, are tied together by a transverse screw connection.

For this purpose, the cutting bar has a Querausneh mung 49 through which the shaft 48 of the Fesselungsschrau be 47 is inserted. As a result, the cutting bar 5 is freely adjustable in the transverse direction even when the captive screw 47 is screwed in. In this regard, reference is made to the remaining description.

The head 50 of the restraining screw 47 is beveled conically in the direction of the base body 4 and is supported with its underside on a conical countersink of the base body. On the other side of the cutting bar 4 is situated in the Grundkör present there tapered ridge pers 4 is a thread which diert correspondent with the provided at the top of the restraining bolt 47 threaded.

The shank 48 of the captive screw is freely rotatable within the transverse recess 49 .

In this way it is achieved that the tapered webs of the base body 4 be tightened against each other by tightening the Fessungsschrau be 47 , which simultaneously exerts a transverse clamping effect on the cutting bar 5 .

The depression in the base body 4 is dimensioned such that the head of the restraining screw 47 does not protrude above the free area portion 16 . In this way, the free surface 3 can run freely within the material to be cut, without the risk of a collision with protruding parts.

The bondage of the two tapered webs is advantageously carried out with such a spacing from the cutting edge 7 that, taking into account the material properties of the base body 4, at most insignificant deformations of the tapered webs occur during the correct operation of the cutting knife.

Since the webs widen towards the upper end of the cutting knife 1 , the restraining screw 47 will expediently be arranged in the middle third of the cutting bar 5 .

FIG. 1b shows a corresponding view of a cutting knife 1 having a Vorwate 24th The roving 24 is formed on the cutting section 6 of the cutting bar 5 , for example ground. Such a roving 24 is only the invention can also be used for material to be cut, which requires a roving 24 . The roving 24 has an obtuse angle than the roving 2 , based on the free surface 3 . The angles are shown exaggerated. The wedge angle of a conventional cutting knife 1 is between 16 ° and 28 °, depending on the material to be cut. Typically, the roving angle is blunt by about 2 ° to 5 ° than this angle. The parting line 25 lies in the area of the edge 2 .

FIG. 2 shows a section through the embodiment of FIG. 1 along the line II in the longitudinal direction 31 .

There are several depth stops 10 . These who formed the handle 18 each with a threaded shaft 17 with screw. The envelope 21 of the lower ends of the threaded shafts 17 forms the depth stop surface of the cutting bar 5 .

Individual and separate screw engagement recesses 19 are provided for each threaded shaft 17 . These are introduced into the base body 4 in such a way that a screwing with engagement in the screw engagement 18 of the threaded shaft is possible with the corresponding tool.

Fig. 3 shows a lower knife 22 , which is one of claims 1 to 11 designed accordingly. However, when viewed from the cutting edge 7 , the free surface 44 of the lower knife 22 is inclined away from the cutting surface at an acute angle. The distinction between bevel 45 and open space 44 is of subordinate importance in the lower knife 22 . It is only essential that a hard cutting edge, for example made of hard metal, of the lower knife 22 is present.

The lower knife 22 has minor design differences compared to the cutting knife 1 or the upper knife 1 : the base body 29 of the lower knife 22 is inserted into a step 46 of a support block 33 . Thus, the Schraubeingriffsausnehmung 19 in the insertion position is not necessarily accessible. To readjust the threaded shaft 17 , the base body 29 can be removed from the recess in the support block 33 . The base of the base is supported on the top of step 46 . For example, forces are reliably removed without horizontal components. As a result, the base body 29 is supported on the support block 33 even under load with the cutting force 11 and is intercepted by the step 46 . The dimensional accuracy and distortion strength of the device are guaranteed.

Fig. 4 shows the top view of the embodiment of FIG. 3 seen in the direction of arrow IV. At the top of the base body 29 mounting holes 36 are present, through which the base body 29 is connected to the support block 33 . This can be ensured, for example, by screws, which should, however, be countersunk in the fastening holes 36 in order to rule out the damage to a paper stack to be cut, for example, by screw heads protruding from the top of the base body 29 .

FIG. 5 shows a cross-section of a slightly different exemplary embodiment from that of FIG. 3. Here is an intermediate bar 35 inserted between the Ge windeschaft 17 and the cutting bar 34 of the lower knife 22 . The intermediate bar 35 thus supports the cutting bar 34 against the cutting force via the threaded shaft 17 . An intermediate bar 35 can also be provided for the upper knife 1 . This saves hard metal material.

Such an intermediate strip is not ground. When adjusting or regrinding, the intermediate bar 35 is therefore not consumed, so that only the small cutting bar 34 must be replaced or exchanged.

Finally, Fig. 6 shows a cutting knife 1 , the insertion end 8 is set in relation to the cutting bar 5 in thickness and tapered.

The insertion end thus corresponds to a longitudinal web which is inserted into the corresponding receiving groove 9 . A separating joint 25 on the wading side and a separating joint 26 on the open surface side are formed at the thickness steps. The support against the cutting force 11 , ie the stop 10 is given by the step surface of the base body 4 . This creates a free space in the receiving groove 9 between the groove bottom of the receiving groove 9 and the top of the insertion end 8 . A threaded hole 40 , into which a lock screw 39 engages, is made in the insertion end 8 . The counter screw 39 rests on the bottom of the engagement recess 19 . When tightening the insertion end 8 and thus the entire cutting bar 5 is tightened and fixed immovably.

The contour of a cutting bar 42 with a used delivery reserve is also shown in dashed lines. The abtragre serving section 38 is removed by grinding the cutting bar 5 .

Reference list

1

Cutting knife

2nd

Wade

3rd

Open space

4th

Basic body

5

Cutting bar

6

Cutting section

7

Cutting edge

8th

Plugging

9

Groove

10th

Depth stop

11

Cutting force

12th

Thickness of the insertion end

13

Cutting bar thickness

14

Thickness level

15

Wade portion of the cutting section

16

Open space portion of the cutting section

17th

Threaded shaft

18th

Screw engagement

19th

Screw engagement recess

20th

flexible holding element

21

Envelope of the depth stops

22

Lower knife

23

Center surface of the cutting bar

24th

Vorwate

25th

Separation joint on the wading side

26

Free-side parting line

27

Groove

28

Stop face of the insertion end

29

Base body of the lower knife

30th

Width direction

31

Longitudinal direction

32

Counter-threaded pin

33

Support block

34

Cutting bar of the lower knife

35

Intermediate bar

36

Mounting hole

37

outer latitude

38

Stock reserve section

39

Lock screw

40

Threaded hole

41

Through hole

42

Cutting bar with used delivery reserve

43

Wading angle

44

Free area of the lower knife

45

Wade of the lower knife

46

step

47

Restraining screw

48

shaft

49

Cross recess

50

head

Claims (12)

1. Cutting knife ( 1 ) with one of the free surface ( 3 ) against the facing edge ( 2 ), consisting of a base body ( 4 , 29 ), on which a cutting bar ( 5 , 34 ) is attached to a cutting section ( 6 ) Has a cutting edge ( 7 ), characterized in that the cutting bar ( 5 , 34 ) with a cutting section ( 6 ) opposite insertion end ( 8 ) detachably inserted into a corresponding receiving groove ( 9 ) of the base body ( 4 , 29 ) and is held there without side play and without play and is supported on a stop ( 10 ) of the base body ( 4 , 29 ) against the relevant component of the cutting force ( 11 ), 2. Cutting knife according to claim 1, characterized in that the cutting bar ( 5 ) is only positively and / or non-positively held in the receiving groove ( 9 ). 3. Cutting knife according to claim 1 or 2, characterized in that the insertion end ( 8 ) with a transition fit with respect to its thickness ( 12 ) in the receiving groove ( 9 ) is fitted. 4. Cutting knife according to one of claims 1 to 3, characterized in that the insertion end ( 8 ) is offset in thickness from the cutting bar and is tapered. 5. Cutting knife according to one of claims 1 to 3, characterized in that the insertion end ( 8 ) has a rather angular cross-section and passes without a step into the cutting section ( 6 ), and that the cutting section ( 6 ) in the stop position of the cutting bar ( 5 ) with a wading portion ( 15 ) and a free area portion ( 16 ) protrudes from the receiving groove ( 9 ). 6. Cutting knife according to claim 5, characterized in that the wading portion ( 15 ) and / or the free area portion ( 16 ) with the base body ( 4 ) forms a common wading ( 2 ) and / or a common open area ( 3 ) / form. 7. Cutting knife according to one of claims 1 to 6, characterized in that the receiving groove ( 9 ) has a depth stop ( 10 ). 8. Cutting knife according to claim 7, characterized in that the depth stop ( 10 ) is adjustable in depth. 9. Cutting knife according to claim 8, characterized in that the depth stop ( 10 ) of a Ge windeschaft ( 17 ) is formed, the screw handle ( 18 ) from a rear screwing recess ( 19 ) of the base body ( 4 ) is accessible. 10. Cutting knife according to one of claims 1 to 9, characterized in that several depth stops ( 10 ) are seen before, the envelope ( 21 ) of which the stop position of the cutting bar ( 5 ) specifies. 11. Cutting knife according to one of claims 1 to 10, characterized in that the insertion end ( 8 ) by a flexible holding element ( 20 ) is secured against falling out in the receiving groove ( 9 ). 12. Cutting knife according to one of claims 1 to 11, characterized in that an upper knife ( 1 ) and a lower knife ( 22 ) are provided, which are designed according to one of claims 1 to 11.