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WO2006000460A1 - Cutting tools or punching tools comprising cutting lines - Google Patents

Cutting tools or punching tools comprising cutting lines

Info

Publication number
WO2006000460A1
WO2006000460A1 PCT/EP2005/006986 EP2005006986W WO2006000460A1 WO 2006000460 A1 WO2006000460 A1 WO 2006000460A1 EP 2005006986 W EP2005006986 W EP 2005006986W WO 2006000460 A1 WO2006000460 A1 WO 2006000460A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
cutting
line
curing
means
laser
Prior art date
Application number
PCT/EP2005/006986
Other languages
German (de)
French (fr)
Inventor
Anton Haas
Original Assignee
Böhler-Uddeholm Precision Strip GmbH & Co. KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00Making other particular articles
    • B21D53/60Making other particular articles cutlery wares; garden tools or the like
    • B21D53/64Making other particular articles cutlery wares; garden tools or the like knives; scissors; cutting blades
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/20Making tools by operations not covered by a single other subclass
    • B21D37/205Making cutting tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23POTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B23P15/40Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools shearing tools

Abstract

The invention relates to a method for producing a cutting or punching tool (1), said method comprising the following steps in the cited order: (a) at least one cutting line (20) is bent into the desired end form thereof, and (b) a hardener (30) is guided along the end form of the cutting line (20) in a continuous-path manner, a tip region (26) of the cutting line (20) being selectively hardened. The invention also relates to cutting or punching tools (1), or cutting lines (20) that are produced according to the cited method.

Description

Cutting lines having cutting tools and punching knife

1. Technical Field The invention relates to cutting tools or punch blade and a method for the preparation of cutting tools or cutting knives for die-cutting of paperboard, leather and textiles, or the like.

2. Prior Art cardboard, in particular corrugated cardboard, textiles and leather are industrially generally cut by punching using cutting tools. Wer¬ to the cutting tools used, punching the desired contour of the finished part from a raw sheet.

A cutting tool according to the prior art is prepared in the following manner: grooves on a base plate, usually by means of a laser, mounted in the mold which will later have the cut-out or punched-out workpiece. There are further mounted mounting holes or other fastening possibilities for Punzierstifte, punching or the like in this base plate, when the finished product is intended to have corresponding elements.

On this plate the cutting lines or cutting knives - the following is spoken for the sake of readability only cutting lines - fixed. To an already sanded and hardened Ausgangsmetall- is band from the roll unwound and bent into the desired shape ge means of suitable tools. The starting metal strip may also be in rod shape vorlie¬ gene. Thereafter, the pre-bent Ausgangsrnetallband is pushed into the burnt-grooves of the base plate and connected either by press-fitting or bonding to the base plate. The cutting lines typically consist of a steel with a tough base body, which can bear the bending stresses at the bend in the form of dips, and a cutting region which is hardened in the toe area to ensure an increased resistance to wear during punching. In this case, the tip area can be cured only to a certain hardness so that the cutting line can be reliably bent at the minimum radius provided the desired shape. If this smallest radius provided unterschrit¬ th, the cutting line so bent tighter than expected, it can cause cracks or fractures particularly in the hardened tip portion of the cutting line. The so specified maximum usable hardness which is significantly lower than would be possible on the hardness of the material technology and forth. Therefore, the cutting tools thus produced wear out quickly and must be replaced wer¬ to. Furthermore, despite the already low curing of the tip portion of the smallest bend radius is limited in order to prevent cracking or breaking of the peak area of ​​the cutting line. This can be personalized with the above cutting tools not tight radii or corners of the raw material punch.

to increase the curing of the tip section further comprises a workshop excessive and insufficient approach is to place the finished cutting tool in a water bath, so that only the cutting edge portion protrudes from the water upwards. Then, it is strongly heated by hand by means of a Autogenbrenners the cutting area and quenched with water, so that it can come to a "curing". By such a rough workshop due process, however arising OFT repeatedly cracks or the punch warp. It is also very disadvantageous that - if at all - then sets a locally very uneven hardness and a very uneven through hardened tip portion thus wears ungleich¬ default. Depending on the skill of the user are also the hardness values ​​obtained with the values ​​of the pre-cured starting material, so that this manual method is not suitable for a commercial production of a Schneid¬ or punching tool. Similar to the above cutting tools is the creation of cutting knives, which thus differ from the cutting tools only by their larger size and greater rigidity. In cutting knives can therefore be dispensed to a base plate. Instead stiff- can also füngsstäbe or the like are provided. Such punching knife are bent to an increasing extent by automatic bending devices which work rules (bending parameters) of Stuerungscomputern obtained. The control computer convert or "translate" the desired geometry of punching knife or cutting lines into corresponding machine instructions for au¬ matic benders. For these die-cutter blade is considered in terms of their problematic hardness properties and minimum bend radius and the risk of breaking or tearing the top of the cutting lines predicted, making knives as a result of the non-essential for the invention differences between cutting and die is not received. the invention can also be applied to the punch knife.

It is therefore to provide the underlying to the invention Problem a cutting or punching tool and a method for their production, which has a higher wear resistance than the prior art, and with which it is possible auszu¬ particularly tight radii or corner from the starting material punching ,

3. Summary of the invention This problem is solved by a method for producing a cutting or punching tool according to claim 1 or by a cutting line according to claim 12 or a cutting or punching tool according to claim 15 °.

In particular, it is achieved by a method for producing a Schneid¬ or punching tool, comprising the following steps in the specified tire - A -

henfolge: (a) bending at least one cutting line to its desired final shape, and (b) performing a path-controlled curing agent along the final shape of the cutting line, wherein a tip portion of the cutting line is selectively hardened.

It is therefore suggested to first bend the uncured and therefore relatively soft and slightly brittle cutting line to its desired final shape and only thereafter selectively to cure the cutting area or parts thereof by means of a bahngesteu¬ Erten curing agent. By the hardnesses of the tip portion after the cutting line was bent into their desired final shape, a hardness of the tip portion can be achieved, which is much higher than the hardness of the precured unbent cutting lines. Further particularly small bending radii can be achieved, the manufactured wä¬ ren with precured cutting lines without cracking or breaking. Through the path-controlled carrying out the hardening process can be performed automatically and accurately controlled. In particular, can thereby hardening parameters such as heating temperature and cooling over the length of Schneidli¬ never define precisely and maintains. Thus, a well-defined hardness and case depth is obtained at the top or cutting area of ​​the cutting line and made uniform hardness characteristics over the entire length of the cutting line sicher¬.

the step of bending the at least one cutting line by means of a NC-controlled bending means on the basis of geometry data leads durchge is preferred. Thus, the bends, which later determine the contour of the punched out part, extremely quickly and accurately placed einge- in the strip material. This is especially for punching knife advantageous that do not require a geomet¬ rubbed consistent base.

In a preferred embodiment, the process before the hardening step further comprises the step of introducing a groove in a base plate by means of a path-controlled Graviermittels on the basis of geometry data, wherein the shape of the groove to the final shape of the cutting line corresponds. Thus, the contour of the punched out component made extremely quickly and accurately ein¬ in a base plate which supports the cutting line, supports and prevents bending of the cutting line.

Further preferably, the process before the hardening step further comprises the step of inserting the cutting line in the groove in the base plate. The ge bent cutting line is placed in the contour determining also the groove Grundplat¬ te and thus fixed to the base plate and fixed geometrically.

In a further embodiment the step of guiding the curing agent is carried out on the basis of geometry data using a path-controlled guide means.

Preferably, the geometric data of the path controlled based guide means for the step of guiding of the curing agent on the geometric data of the bahngesteu¬ Erten Graviermittels for the step of introducing the groove or the Geometrie¬ data of the NC-controlled bending means. The geometry data that have already been used to produce the desired cutting contour can thus be re-used for curing. Thus, the expense for the con- trolled out the curing agent is reduced to minimal adjustments.

Further preferably, the path-controlled guide means and the bahngesteuer¬ te engraving means is the same guide member. So that no additional investment is required for curing. The guide means can be used both for the preparation of the groove in the base plate as well as for guiding the curing agent.

In a further preferred embodiment the curing agent is a CW laser, a CO 2 laser, an electron beam generator, an induction coil or a Plas¬ is maerzeuger. the engraving means a CW laser, a CCVLaser or an end mill is preferred. More preferably, the engraving means and the curing agent of the same CW laser, or the same CO 2 laser. Thus the engraving means itself can be used as a hardening agent, which in turn reduces the installation costs.

Preferably, the method comprises prior to the curing step further comprises the step of exchanging a Gravieroptik the CW laser or CO 2 laser by a hardness optics. can switch to the laser engraving denbereiches from the groove to the rigors of Schneider simply ver¬ a different look than for engraving applies to.

The above problems are also solved by a cutting line which has been prepared by the abovementioned process.

Preferably, the cutting line a basic body and a cured peak zen setting up, which has a hardness which essentially corresponds to the maximum possible use of the material hardness of the cutting line being used.

Preferably, the cutting line on a steel grade C60, wherein the gehär¬ ended tip region has a required hardness of over 800 HV 0.5, preferably of more than 850 HV 0.5, and most preferably of more than 900 HV 0.5. So that the hardness of the tip region is much higher than the hardness of the cutting lines of the prior art. One can, for example, material at cutting lines from the Werk¬ C60 possible by the materials manufacturer maximum hardness of about 850 HV 0.5 obtain. When using a laser even values ​​of over 900 HV 0.5 can be achieved, as is done by the small-scale, practical point source of heat deterrence particularly fast.

The above problems are solved by generating also a cutting or Stanzwerk¬, comprising at least one above-mentioned cutting line.

Further preferred embodiments are evident from the dependent claims. 4. Brief Description of the Drawings The invention will be explained in more detail on hand of the drawing. In which:

Fig. 1 is a base plate of a cutting tool with an inserted groove;

Figure 2 shows the base plate of Figure 1 with an inserted into the groove cutting line..; and

Fig. 3 shows schematically the movement of a curing agent during curing of the eingesetz¬ th cutting line.

5. Description of the preferred embodiments, hi the sequence will be described by means of the drawings, preferred embodiments of the invention.

As shown in Fig. 1, path-controlled Graviermittels is milled or groove 12 eingra¬ fourth in a base plate 10 by means of a (not shown in Fig. 1). The shape of the groove 12 corresponds to the desired sectional shape of the end herzu- alternate cutting or punching tool.

The base plate 10 is preferably a flat plate made of wood, plastic or ei¬ nem wood material, for example pressboard, MDF or the like. but the Grund¬ plate could also be made of other suitable material or be curved or bent also for special punching or cutting tasks.

For engraving the groove 12 in the base plate 10 a bahnge¬-controlled engraving means is preferably employed. Laser but also a conventional end mills - to a CW laser or a CO 2 suitable. The power of the laser is adjusted such that a sufficient penetration depth in the base plate 10 is achieved, but it still has enough residual thickness. The laser or router is located in a suitable laser or cutter head, which preferably NC -bahngesteuert is moved over the base plate tenth Instead of an NC control but also a simpler control can be used. The NC controller preferably controls an XYZ-Portal, on which the laser or milling head is attached. Alternatively, an industrial robot can be used to.

The NC controller guides the laser or milling head to engrave the groove 12 Toggle handle of geometry data, the piece based on the geometry of the Werk¬ be excreted.

In the groove 12, a curved cutting line as shown in Fig. 2, sets einge¬ 20 and fixed, for example glued. The cutting line 20 consisting of a band-shaped metal strip with a base 22 and a pointed edge portion 24 (see Fig. Fig. 3). The cutting line 20 is bent in its uncured state, so that particularly small bending radii without the risk of formation Riss¬ are possible.

A preferred material for the cutting line 20 is a steel of grade C60, but it can also be any other carbon steel or tool steel wer¬ used to, which can be in the uncured tape-shaped state bend well and ge hardened state sufficient for punching use hardness ¬ has. If to be cured without coolant, is air-hardening steel offer varieties as material for the cutting line 20th

In Fig. 3 the hardening process is shown schematically. Fig. 3 shows ausschnittswei¬ se a part of the base plate 10 with an inserted cutting line 20. A curing agent 30 is lead so entlangge- along the curved and still uncured cutting line 20, that it can act on the cutting portion 24 and at least a tip portion of the cutting portion 24 cures , The direction of movement Här¬ temittels 30 is indicated by the arrow V.

The hardener 30 may be a CW or 12 CO 2 laser as the engraving means for introducing the groove. but it can also depending on the desired Härteverfah¬ ren a Elektonenstrahlerzeuger, an inductor or a plasma generator to be. Other curing agents are conceivable, which can cause heat into the cutting area 24 of the cutting line.

During the hardening process, the hardening agent 30 (a laser head 30 here) by means of a NC-controlled guide means so guided and optionally pivoted such that it exactly follows the cutting line 30 and this cured in its tip portion 26th Preferably to a current generated by the laser 30 laser beam 32 strikes directly on the tip of the cutting line twentieth This requires, depending on the curing agent of an offset "h" normal to the base plate and, optionally, a rotation that controls the curing agent is always normal to the each processed tip portion 26, and thus in the direction of the radius of curvature of the cutting line twentieth The other parameters of the hardening process, such as machining speed, Aufheizintensi¬ ty, cooling rate will be integrated into the control algorithm for the curing agent.

With inductive hardening of the rotation of the curing agent, which is directly, or more precisely "top" normal to the base plate plane, guided along the Spitzenberei¬ ches 26 of the cutting line 20 entfallt.

After curing, the hardened tip portion 26 of the cutting line 20 at a steel grade C60, a required hardness of over 800 HV 0.5 or bevor¬ Trains t of more than 850 HV 0.5. When using a special pulsed or CW CO2 laser through the nearly point-shaped and therefore highly localized heat input hardness values of up to 900 HV 0.5 or above can len erzie¬. Preferably, the same system can be used as was used for the engraving process as a hardening agent 30th Also, the laser used may for example be used for curing. If necessary, the loading must be adapted operating parameters only. It is also conceivable optics to swing into the beam path of the laser. Thus, the optics for the engraving of the groove could for example be replaced by a special hardening optics 12th

Naturally, however, the processing head for hardening can be exchanged and a special lasers are used for hardening. The hardening process can also be done on a different workstation because the Steue¬ tion of the curing agent with already existing control program for the development of Herstel¬ grooves 12 only is still associated with low computational complexity.

It is, especially if the cure follows er¬ on a separate workstation, of course, possible to take all the required measures in hardening or set special conditions. This can beispiels¬ as working in a protective atmosphere or be quenching with a special medium. Here, the waste, in the case of quenching medium schreck either be integrated in the hardness of the head, or it may be a second machining head are conducted at an appropriate distance from the first head which is used for quenching.

The control data required for NC or path control can be calculated from the existing of the engraving process for the groove geometry data automatically be¬.

The acquisition of geometry data also applies in the case of the above angesproche¬ nen punching blade, as well as the geometry for NC-controlled bending machines is already available in electronic form and by a relatively simple "translation-program" and a transformation program for the movements of the curing agent can be formed.

comparable Another form of cutting tools 1 of the type mentioned applies also cutting lines 20 and punch blades, which are not fixed on a flat base plate 10, but on a circular cylindrical drum or roller. The material to be cut is then drawn between this roll and a counter roll, and is cut at appropriate points or embossed.

The present invention is, of course, for this type of Werkzeu¬ gen applicable. the production of the grooves is also preferred in this case, 12 carried out on the drum or roller by means of a device which is controlled by an NC program, so that a curing agent along the cutting line can be guided by appropriate adaptation of the NC program is also , It can - be made of the data for preparing the grooves 12 - if present.

Another advantage of the invention is that not only the cutting lines, but all located in the form of other tools such as Punzierstifte, punching perforating / perforating Combined lines / combination knife and the like. More may also be selectively cured. In this way, these elements are brought to the same level of hardness as the tip area 26 of the cutting line 20, thereby optimizing the service life and the set-up time of cutting or punching tools 1, and hence the corresponding costs are minimized. Bezuεszeichenhste

1 punching or cutting tool 10 base plate 12 groove 20 cutting line 22 base body 24 cutting portion 26 hardened tip portion 30 curing agent or laser 32 laser beam

Claims

claims
1. A method for producing a cutting or punching tool (1), aufwei¬ send the following steps in the given order:
a. Bending at least one cutting line (20) into its desired final shape;
b. path-controlled guiding of a curing agent (30) along the final shape of the cutting line (20), wherein a tip portion (26) of the cutting line (20) se- cured tively.
2. The method of claim 1, wherein the step of bending the at least one cutting line (20) by means of a NC-controlled bending means on the Ba¬ sis is performed by geometry data.
3. A method according to any one of claims 1 or 2, prior to the curing step weiter¬ toward comprising the step of introducing a groove (12) in a base plate (10) by means of a path-controlled Graviermittels riedaten based on Geomet¬, wherein the shape of the groove (12) the final shape of the cutting line (20) corresponds.
4. The method of claim 3, prior to the curing step further comprising the step of inserting the cutting line (20) into the groove (12) in the base plate (10).
5. The method according to any one of claims 1-4, wherein the step of guiding the hardening agent (30) by means of a path-controlled guide means is performed on the basis of geometry data.
6. The method of claim 5, wherein the geometry data of the path-controlled guide means for the step of passing the hardening agent (20) on the geometric data of the path controlled Graviermittels for the step of Einbrin¬ gens of the groove (12) or the geometric data of the NC-controlled bending means are based.
7. The method according to claim 5 or 6, wherein said path-controlled Führungsmit¬ tel and the path-controlled engraving means is the same guide member.
8. A method according to any one of claims 1-6, wherein the curing agent is a CW laser, a CCVLaser, an electron beam generator, an induction coil or a plasma generator.
9. A method according to any one of claims 1-7, wherein the engraving means a CW laser, or an end mill is CCVLaser.
10. The method of claim 9, wherein said engraving means and the curing agent of the same CW laser, or the same CO 2 laser.
11. The method of claim 10, before the curing step further comprising the step of exchanging a Gravieroptik the CW laser or CO 2 - laser by a hardness optics.
12, cutting line (20) produced by a process according to claims 1 - 10.
13, cutting line (20) according to claim 12, comprising:
a) a base body (22); and
b) corresponds to a hardened tip portion (26) having a hardness, and consisting essentially of the maximum possible use of the hardness Mate¬ used rials of the cutting line (20).
14. Cutting line according to claim 13, comprising a steel grade C60, it being possible for the hardened tip portion (26) a use hardness of about 800 HV 0.5, preferably of more than 850 HV 0.5, and most preferably of more than 900 HV 0, 5 has.
15, cutting or punching tool (1) comprising at least one cutting line (20) according to claims 12-14.
PCT/EP2005/006986 2004-06-29 2005-06-29 Cutting tools or punching tools comprising cutting lines WO2006000460A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200410031421 DE102004031421A1 (en) 2004-06-29 2004-06-29 Cutting lines having cutting tools and punching knife
DE102004031421.7 2004-06-29

Publications (1)

Publication Number Publication Date
WO2006000460A1 true true WO2006000460A1 (en) 2006-01-05

Family

ID=34979254

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/006986 WO2006000460A1 (en) 2004-06-29 2005-06-29 Cutting tools or punching tools comprising cutting lines

Country Status (2)

Country Link
DE (1) DE102004031421A1 (en)
WO (1) WO2006000460A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581604A (en) * 1965-06-14 1971-06-01 Sandvik Steel Of Colorado Inc Cutting strips, cutting die knives, cutting rules and the like
US3866491A (en) * 1972-09-15 1975-02-18 Boehler & Co Ag Geb Stamping knife
US4562754A (en) * 1982-03-04 1986-01-07 Usm Corporation Methods for constructing cutting tools
EP0327530A2 (en) * 1988-02-03 1989-08-09 BÖHLER Gesellschaft m.b.H. Cutting rule for working sheet material
EP0780199A1 (en) * 1995-12-19 1997-06-25 Katayama Steel Rule Die, Inc. Counter plate and cutting die for die-cutting machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581604A (en) * 1965-06-14 1971-06-01 Sandvik Steel Of Colorado Inc Cutting strips, cutting die knives, cutting rules and the like
US3866491A (en) * 1972-09-15 1975-02-18 Boehler & Co Ag Geb Stamping knife
US4562754A (en) * 1982-03-04 1986-01-07 Usm Corporation Methods for constructing cutting tools
EP0327530A2 (en) * 1988-02-03 1989-08-09 BÖHLER Gesellschaft m.b.H. Cutting rule for working sheet material
EP0780199A1 (en) * 1995-12-19 1997-06-25 Katayama Steel Rule Die, Inc. Counter plate and cutting die for die-cutting machine

Also Published As

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