CA1267074A - Method for manufacturing a cutting tool and resulting tool - Google Patents
Method for manufacturing a cutting tool and resulting toolInfo
- Publication number
- CA1267074A CA1267074A CA000511833A CA511833A CA1267074A CA 1267074 A CA1267074 A CA 1267074A CA 000511833 A CA000511833 A CA 000511833A CA 511833 A CA511833 A CA 511833A CA 1267074 A CA1267074 A CA 1267074A
- Authority
- CA
- Canada
- Prior art keywords
- beads
- cutting tool
- cutting
- tool
- threads
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/40—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools shearing tools
- B23P15/406—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools shearing tools rotary or plane die cutters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/44—Cutters therefor; Dies therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/384—Cutting-out; Stamping-out using rotating drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/44—Cutters therefor; Dies therefor
- B26F2001/4472—Cutting edge section features
Abstract
ABSTRACT OF THE DISCLOSURE
Disclosed is a method for manufacturing a cutting tool which comprises the deposition by micro-spraying of beads of mater-ial on the circumferential surface of a metal cylinder according to a pattern in the form of a mesh network with cutting and creas-ing threads. The beads of material are then tooled by electro-erosion by means of a plane graphite electrode without touching any part of the circumferential surface of the cylinder. The method is particularly useful for manufacturing tools for the rotative cut-ting of paper or cardboard.
Disclosed is a method for manufacturing a cutting tool which comprises the deposition by micro-spraying of beads of mater-ial on the circumferential surface of a metal cylinder according to a pattern in the form of a mesh network with cutting and creas-ing threads. The beads of material are then tooled by electro-erosion by means of a plane graphite electrode without touching any part of the circumferential surface of the cylinder. The method is particularly useful for manufacturing tools for the rotative cut-ting of paper or cardboard.
Description
~ 200--55 i'7~i~7'?~
This inven-tion relates to a procedure for the manufact-ure of cutting tools, notably rotating cutting tools, for sheet or strip ma-terial and a tool as thus obtained.
This type of rotating cutting tool generally consis-ts of two cylinders: a male cylinder comprising the cutting tool and a female cylinder comprising a counter cylinder or anvil. The cutt-ing tool is mounted above the counter cylinder or anvil and the material to be cut, for example, paper or cardboard, passes bet-ween these tools in the same fashion as tin in a roller for example.
The theoretical longitudinal axis of each tool is situated in the same vertical plane.
The cutting tool is made from a metallic cylinder, on the lateral surface of which is machined a network of cutting threads and compressors. The developed image of the networX rep-resents the arrangement of the objects to be cut.
The lateral surface of the counter cylinder presents a network of grooves whose disposition is conjugated to the dispos-ition of the compressor threads of the cutting tool. In certain cases, the counter cylinder can be smooth and is then preferably called an anvil.
The fabrication of such a tool can take place by various methods, that is to say, that different networks of threads and grooves can be obtained by either fraising or by electro-erosion.
These milling machines or electro-erosion machines are numerical-ly directed, permitting precise and automatic results. Most often, the tools are obtained by electro-erosion, using for example a graphite electrode previously cut on the basis of the cutting work to be completed. The American patent No. 3,796,851 describes such JBF ~7 ~2~7074 a type.
With regard to rotating cutting tools, it is to be noted that the tooling of the anvil cylinder is easier than the tooling of the cutting cylinder, because it requires making grooves on the surface of the cylinder. This tooling does not require much time, and can be done by simple milling, without needing electro-erosion.
As far as the tooling of the cutting cylinder is concerned, it is quite different, because this cylinder is to be provided with rais-ed threads or ribs, and not grooves. This means that a significant volume of material is to be removed from the surface of the cylinder, which takes time. Moreover, the crossings of the threads can not be tooled precisely enough, and must be retouched manually, as the milling tool has a given diameter. The technique of choice is thus electro-erosion, ensuring accurate angles at the crossings of the threads. However, the tooling still takes a lot of time. With both methods, in any case, the mechanical characteristics remain the same as those of the material chosen for the central body of the cylinder.
The present invention seeks to solve these problems with a method which notably reduces the time required for tooling of a cutting tool, and still enables any modification of the mechanical characteristics of the threads (ribs).
Thus, in accordance with a broad aspect of the invention, there is provided a method for manufacturing a cutting tool for sheet or web material, characterized in that beads of material are laid onto the circumferential surface of a metal cylinder, said -3- LZ~7G~7'-~
beads of material being laid down as a mesh network having the shape of a blank to be cut from said sheet or web material, and that said beads of material are then tooled, while avoiding the cireumferential surface of said metal cylinder.
In drawings which illustrate embodiments of the invent-ion:
Figure 1 is a partial cross sectional view of a first cutting tool, Figure 2 is a partial cross sectiona~l view of a second cutting tool, Figure 3 is a cross sectional view of a cutting thread, Figure 4 is a cross sectional view of a creasing tool, Figure 5 is a perspective view of a cutting tool, Figure 6 is a plan view of the eircumferential surfaee of a eutting tool, and Figure 7 is a view of the developed lateral face of the cutting tool.
Figure 1 is a partial cross sectional view of a first eutting tool, more precisely of a cutting tool 3 machined by elec-tro-erosion with a metal eylinder 1 onlv partially shown in this figure. The circumferential surface of the cutting tool 6, as shown in Figure 5, is provided with numerous threads or ribs 2, which can be cutting or ereasing threads. These threads 2 are ar-ranged like mesh networks, eaeh having the pattern of a box blank 5 to be eut (see Figure 6). To simplify the drawing, only a seg-ment of one cutting thread 2 is shown. The eutting tool is realiz-ed by eroding all the material 4 along the threads 2. The volume _4- ~7~ 7~
oE the material to be removed by electro-el-osion or milling is calculated as follows:
V = VcOur ~ Vd vr VCOur being the total volume of material of the rim where the threads are tooled, Vd the total volume of material of the cutting threads and Vr the total volume of material of the creasing tools.
The formula for the calculation of VCOur is :
VCOur ll4 L- Cd - (d - 2h)]
L being the length of the cylinder, d the external diameter, and h the height of the threads. The total volume of material requir-ed for the cutting threads Vd in the arrangement of Figure 7 is calculated with the formula:
Vd = Sd . Ld In this formula, Sd is the section of a cutting tool 10 (see Fig-ure 3) and Ld the total length of the cutting tools. A plan view of a box blank 5 to be cut, drawn on the circumferential surface of the tool, shows three boxes along the length L of the cylinder, and four boxes aroundits circumference (see Figure 6 and 7). It enables the calculation of Ld in the formula hereafter, i.e. a total of twelve boxes in this example.
Ld = 12 C2.(2A+2B+P) + (H+2B) + 6B~ - 9(2A+2B) - 8H
. =
total cutting length. common cutting length.
This formula can be simplified as follows :
Ld = 30(A+5B) -~ 8(3P+2H) Sd is the section of the cutting thread (see Figure 3) and is cal-culated with lZ6~
S = T -~ P
Thus the final formula for the calculation of the total volume of the cutting threads is VD =( D D HD) L30(A+B) + 8(3P+2H~]
And the total volume of material given by the creasing threads (Vr) in our example, is defined by the following formula :
Vr = Sr . Lr Sr being the section of a creasing tool and Lr the total length of creasing thread.
10This section Sr of the creasing thread 11 (see Figure 4) is calculated with:
S = TR+PR. H
r :2 - R
Referring to Figure 6, one can calculate the total length Lr of the creasing tools with :
Lr = 12[2(2A+2B) + 4 simplified as follows :
Lr = 48(A+B+H) Thus the total volume V is :
r ( R + R HR) . 48(A+B+H) 20These calculations give the formula required for the cal-culation of the total volume V of the material to be removed, i.e.:
V = 1~,. L ~d -2h) ~ [(TD D~- HD] [30(A+5 8(3P+2H)~ ~TR+PR) . H ~8(A+B+H+)]
This inven-tion relates to a procedure for the manufact-ure of cutting tools, notably rotating cutting tools, for sheet or strip ma-terial and a tool as thus obtained.
This type of rotating cutting tool generally consis-ts of two cylinders: a male cylinder comprising the cutting tool and a female cylinder comprising a counter cylinder or anvil. The cutt-ing tool is mounted above the counter cylinder or anvil and the material to be cut, for example, paper or cardboard, passes bet-ween these tools in the same fashion as tin in a roller for example.
The theoretical longitudinal axis of each tool is situated in the same vertical plane.
The cutting tool is made from a metallic cylinder, on the lateral surface of which is machined a network of cutting threads and compressors. The developed image of the networX rep-resents the arrangement of the objects to be cut.
The lateral surface of the counter cylinder presents a network of grooves whose disposition is conjugated to the dispos-ition of the compressor threads of the cutting tool. In certain cases, the counter cylinder can be smooth and is then preferably called an anvil.
The fabrication of such a tool can take place by various methods, that is to say, that different networks of threads and grooves can be obtained by either fraising or by electro-erosion.
These milling machines or electro-erosion machines are numerical-ly directed, permitting precise and automatic results. Most often, the tools are obtained by electro-erosion, using for example a graphite electrode previously cut on the basis of the cutting work to be completed. The American patent No. 3,796,851 describes such JBF ~7 ~2~7074 a type.
With regard to rotating cutting tools, it is to be noted that the tooling of the anvil cylinder is easier than the tooling of the cutting cylinder, because it requires making grooves on the surface of the cylinder. This tooling does not require much time, and can be done by simple milling, without needing electro-erosion.
As far as the tooling of the cutting cylinder is concerned, it is quite different, because this cylinder is to be provided with rais-ed threads or ribs, and not grooves. This means that a significant volume of material is to be removed from the surface of the cylinder, which takes time. Moreover, the crossings of the threads can not be tooled precisely enough, and must be retouched manually, as the milling tool has a given diameter. The technique of choice is thus electro-erosion, ensuring accurate angles at the crossings of the threads. However, the tooling still takes a lot of time. With both methods, in any case, the mechanical characteristics remain the same as those of the material chosen for the central body of the cylinder.
The present invention seeks to solve these problems with a method which notably reduces the time required for tooling of a cutting tool, and still enables any modification of the mechanical characteristics of the threads (ribs).
Thus, in accordance with a broad aspect of the invention, there is provided a method for manufacturing a cutting tool for sheet or web material, characterized in that beads of material are laid onto the circumferential surface of a metal cylinder, said -3- LZ~7G~7'-~
beads of material being laid down as a mesh network having the shape of a blank to be cut from said sheet or web material, and that said beads of material are then tooled, while avoiding the cireumferential surface of said metal cylinder.
In drawings which illustrate embodiments of the invent-ion:
Figure 1 is a partial cross sectional view of a first cutting tool, Figure 2 is a partial cross sectiona~l view of a second cutting tool, Figure 3 is a cross sectional view of a cutting thread, Figure 4 is a cross sectional view of a creasing tool, Figure 5 is a perspective view of a cutting tool, Figure 6 is a plan view of the eircumferential surfaee of a eutting tool, and Figure 7 is a view of the developed lateral face of the cutting tool.
Figure 1 is a partial cross sectional view of a first eutting tool, more precisely of a cutting tool 3 machined by elec-tro-erosion with a metal eylinder 1 onlv partially shown in this figure. The circumferential surface of the cutting tool 6, as shown in Figure 5, is provided with numerous threads or ribs 2, which can be cutting or ereasing threads. These threads 2 are ar-ranged like mesh networks, eaeh having the pattern of a box blank 5 to be eut (see Figure 6). To simplify the drawing, only a seg-ment of one cutting thread 2 is shown. The eutting tool is realiz-ed by eroding all the material 4 along the threads 2. The volume _4- ~7~ 7~
oE the material to be removed by electro-el-osion or milling is calculated as follows:
V = VcOur ~ Vd vr VCOur being the total volume of material of the rim where the threads are tooled, Vd the total volume of material of the cutting threads and Vr the total volume of material of the creasing tools.
The formula for the calculation of VCOur is :
VCOur ll4 L- Cd - (d - 2h)]
L being the length of the cylinder, d the external diameter, and h the height of the threads. The total volume of material requir-ed for the cutting threads Vd in the arrangement of Figure 7 is calculated with the formula:
Vd = Sd . Ld In this formula, Sd is the section of a cutting tool 10 (see Fig-ure 3) and Ld the total length of the cutting tools. A plan view of a box blank 5 to be cut, drawn on the circumferential surface of the tool, shows three boxes along the length L of the cylinder, and four boxes aroundits circumference (see Figure 6 and 7). It enables the calculation of Ld in the formula hereafter, i.e. a total of twelve boxes in this example.
Ld = 12 C2.(2A+2B+P) + (H+2B) + 6B~ - 9(2A+2B) - 8H
. =
total cutting length. common cutting length.
This formula can be simplified as follows :
Ld = 30(A+5B) -~ 8(3P+2H) Sd is the section of the cutting thread (see Figure 3) and is cal-culated with lZ6~
S = T -~ P
Thus the final formula for the calculation of the total volume of the cutting threads is VD =( D D HD) L30(A+B) + 8(3P+2H~]
And the total volume of material given by the creasing threads (Vr) in our example, is defined by the following formula :
Vr = Sr . Lr Sr being the section of a creasing tool and Lr the total length of creasing thread.
10This section Sr of the creasing thread 11 (see Figure 4) is calculated with:
S = TR+PR. H
r :2 - R
Referring to Figure 6, one can calculate the total length Lr of the creasing tools with :
Lr = 12[2(2A+2B) + 4 simplified as follows :
Lr = 48(A+B+H) Thus the total volume V is :
r ( R + R HR) . 48(A+B+H) 20These calculations give the formula required for the cal-culation of the total volume V of the material to be removed, i.e.:
V = 1~,. L ~d -2h) ~ [(TD D~- HD] [30(A+5 8(3P+2H)~ ~TR+PR) . H ~8(A+B+H+)]
2 R]
' 6 ~ 7~
In this example, the values of the various parameters have been defined in such a way that later on a comparison can be established between the volumes of material to be eroded in various tooling conditions.
The values considered are :
a = 301.76 mm Pr = 1.538 mm h = 1 mm A = 116.5 mm L = 1000 m B = 42 mm Td= 0-03 mm H = 153 mm PD= 0.858 mm P = 13 mm TR= 0.71 mm According to the formula, the total volume V to be erod-ed will thus be 922487 mm3, that is 1 dm3.
Figure 2 is a partial cross sectional view of a second cutting tool 6 manufactured with a metal cylinder 7 having a dia-meter dl covered in one single operation.
The circumferential surface of this cylinder 7 has been covered with a bead of material 8 having different mechanical characteristics from the cylinder 7, according to a well known mat-20 erial depositing process, in one single operation. These charact-eristics can be chosen with regard to the job to be done by the cutting tool. The bead material can easily be a micro-sprayed alloy available under the registered trademark Eu Tro Loy, and deposited by means of the "Eu Tronic Gap" process, both owned by the Castolin company. This depositing operation covers all areas to be provided with a creasing or cutting tool 9 according to the ~2~7~
display shown in Figure 7. A section of the bead of material 8 comprises a circular segment with a radius R and an angle ~ of a sagitta f. The diameter dl is qui-te important compared to the radius R. It can be assumed that the chord a of the circular seg-ment is a straight line, in order to simplify the calculation of the total volume Vl of the deposited material 8. The values meas-ured after the depositing operation are the chord a of the circu-lar segment and the sagitta f.
Thus one can calculate the segment surface.
S t =~rR ~ (R-f) .a R is the radius of the imaginary circle, containing the string of material 8, "f" and "a" being the measured values of the sagitta and the chord. Witho< being the angle of the circular segment, :
R a2 + f 8f 2 and the angle is :
c< = 2.sin 1 . a ~ 2R
The total volume V to be reported depends on the - mat aforementioned length of the cutting and creasing threads, with the formula :
Vmat ( d r)' Vmat = [~R .o~ - (R -f).a~ L30 . (A+5B) + 8.(3P+2H)-~
48(A+B+H~
7~7'~
In this example, a = 6 mm f = 2 mm so that R = 3.25 mm and o~= 134.76.
Consequently, the total volume of material to be de-posited is 238,485 mm3.
Finally, the string of material deposited has to be mach-ined with egard to the desired threads.
Therefore, a given volume of material Ver has to be re-moved according to the forMula V = V - V - V
er mat r d Vr and Vd have already been calculated in the aforementioned ex-ample. Ver will thus be 238,485 - 16,806 - 5,574 = 216,105 mm3.
This shows that for the same cutting tool the second solution re-quires less material removal than the first solution. Considering only the time required for tooling in both examples and knowing that the time required for the erosion is proportional to the mat-erial to be removed, we obtain:
Ver 100 = 216,105 100 = 23.43%
V 922,487 ~ being the ratio between two volumes to be eroded. The gain of time on the tooling operation is thus G = 100 - ~= 100 - 23.43 = 76.57%
This gain of time, of course, lowers the cost of the tooling. A
cutting tool 10, as shown in Figure 3, has a trapezoidal section.
D refers to the larger base, TD to the smaller base and HD to the height.
Figure 4 shows a creasing thread 11, also with trape-zoidal section, with a reference PR for the larger base, TR for the ~2;7G7~
smaller base and HR for the height of the trapezium.
Figure 5 is a perspective view of a cutting tool 3. It shows the general aspect of such a tool, defining -the values L and d, i.e. respectively the tool lenqth and diameter (see also Figure 1 and 2).
Figure 6 is a view in plan format of a cut box 5 of which the exterior contours are represented in solid lines corres-ponding to the cutting threads 10 and the interior lines are rep-resented in interrupted lines corresponding to the suppressed creasing threads 11. Sides A, B, and H represent, respectively, the width, the thickness and the height of the box being made while the P side relates to the width of the sticking support(seal~
of the box.
Figure 7 is a view of the developed lateral face of the cutting tool 6. The length, represented by mixed lines, corres-ponds to the length of the cylinder in which the cutting tool is machined, while side C relates to its circumference. It is also the configuration of the plane graphite electrode used for the image of the tool. In this figure, the cutting threads 10 are rep-resented by continuous lines and suppressed(creasing~threads 11 byinterrupted lines. It can thus be concluded, that a certain num-ber of cutting threads 10 are similar to the same cut of box 5 and that this has been taken into consideration in the preceding com-putation to determine the total length of the threads. Cutting tool 6 obtained by using this method has many advantages, such as its low price in comparison to a tool machined in the conventional fashion and the benefit of being able to choose the physical char-acteristics of the thread material in relationship to the cutting , ~2t~ 7'~
--10~
jobs which one wishes to do. The user thus has a~ailable a tool meeting the criteria of low price and long life with the flexibil-ity of handling material of the user's choice.
' 6 ~ 7~
In this example, the values of the various parameters have been defined in such a way that later on a comparison can be established between the volumes of material to be eroded in various tooling conditions.
The values considered are :
a = 301.76 mm Pr = 1.538 mm h = 1 mm A = 116.5 mm L = 1000 m B = 42 mm Td= 0-03 mm H = 153 mm PD= 0.858 mm P = 13 mm TR= 0.71 mm According to the formula, the total volume V to be erod-ed will thus be 922487 mm3, that is 1 dm3.
Figure 2 is a partial cross sectional view of a second cutting tool 6 manufactured with a metal cylinder 7 having a dia-meter dl covered in one single operation.
The circumferential surface of this cylinder 7 has been covered with a bead of material 8 having different mechanical characteristics from the cylinder 7, according to a well known mat-20 erial depositing process, in one single operation. These charact-eristics can be chosen with regard to the job to be done by the cutting tool. The bead material can easily be a micro-sprayed alloy available under the registered trademark Eu Tro Loy, and deposited by means of the "Eu Tronic Gap" process, both owned by the Castolin company. This depositing operation covers all areas to be provided with a creasing or cutting tool 9 according to the ~2~7~
display shown in Figure 7. A section of the bead of material 8 comprises a circular segment with a radius R and an angle ~ of a sagitta f. The diameter dl is qui-te important compared to the radius R. It can be assumed that the chord a of the circular seg-ment is a straight line, in order to simplify the calculation of the total volume Vl of the deposited material 8. The values meas-ured after the depositing operation are the chord a of the circu-lar segment and the sagitta f.
Thus one can calculate the segment surface.
S t =~rR ~ (R-f) .a R is the radius of the imaginary circle, containing the string of material 8, "f" and "a" being the measured values of the sagitta and the chord. Witho< being the angle of the circular segment, :
R a2 + f 8f 2 and the angle is :
c< = 2.sin 1 . a ~ 2R
The total volume V to be reported depends on the - mat aforementioned length of the cutting and creasing threads, with the formula :
Vmat ( d r)' Vmat = [~R .o~ - (R -f).a~ L30 . (A+5B) + 8.(3P+2H)-~
48(A+B+H~
7~7'~
In this example, a = 6 mm f = 2 mm so that R = 3.25 mm and o~= 134.76.
Consequently, the total volume of material to be de-posited is 238,485 mm3.
Finally, the string of material deposited has to be mach-ined with egard to the desired threads.
Therefore, a given volume of material Ver has to be re-moved according to the forMula V = V - V - V
er mat r d Vr and Vd have already been calculated in the aforementioned ex-ample. Ver will thus be 238,485 - 16,806 - 5,574 = 216,105 mm3.
This shows that for the same cutting tool the second solution re-quires less material removal than the first solution. Considering only the time required for tooling in both examples and knowing that the time required for the erosion is proportional to the mat-erial to be removed, we obtain:
Ver 100 = 216,105 100 = 23.43%
V 922,487 ~ being the ratio between two volumes to be eroded. The gain of time on the tooling operation is thus G = 100 - ~= 100 - 23.43 = 76.57%
This gain of time, of course, lowers the cost of the tooling. A
cutting tool 10, as shown in Figure 3, has a trapezoidal section.
D refers to the larger base, TD to the smaller base and HD to the height.
Figure 4 shows a creasing thread 11, also with trape-zoidal section, with a reference PR for the larger base, TR for the ~2;7G7~
smaller base and HR for the height of the trapezium.
Figure 5 is a perspective view of a cutting tool 3. It shows the general aspect of such a tool, defining -the values L and d, i.e. respectively the tool lenqth and diameter (see also Figure 1 and 2).
Figure 6 is a view in plan format of a cut box 5 of which the exterior contours are represented in solid lines corres-ponding to the cutting threads 10 and the interior lines are rep-resented in interrupted lines corresponding to the suppressed creasing threads 11. Sides A, B, and H represent, respectively, the width, the thickness and the height of the box being made while the P side relates to the width of the sticking support(seal~
of the box.
Figure 7 is a view of the developed lateral face of the cutting tool 6. The length, represented by mixed lines, corres-ponds to the length of the cylinder in which the cutting tool is machined, while side C relates to its circumference. It is also the configuration of the plane graphite electrode used for the image of the tool. In this figure, the cutting threads 10 are rep-resented by continuous lines and suppressed(creasing~threads 11 byinterrupted lines. It can thus be concluded, that a certain num-ber of cutting threads 10 are similar to the same cut of box 5 and that this has been taken into consideration in the preceding com-putation to determine the total length of the threads. Cutting tool 6 obtained by using this method has many advantages, such as its low price in comparison to a tool machined in the conventional fashion and the benefit of being able to choose the physical char-acteristics of the thread material in relationship to the cutting , ~2t~ 7'~
--10~
jobs which one wishes to do. The user thus has a~ailable a tool meeting the criteria of low price and long life with the flexibil-ity of handling material of the user's choice.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Method for manufacturing a cutting tool for sheet or web material, characterized in that beads of material are laid onto the circumferential surface of a metal cylinder, said beads of material being laid down as a mesh network having the shape of a blank to be cut from said sheet of web material, and that said beads of material are then tooled, while avoiding the circumfer-ential surface of said metal cylinder.
2. Method according to claim 1, characterized in that the beads of material are laid down by micro-spraying onto the cylin-der in one single operation and tooled by electro-erosion by means of a plane graphite electrode.
3. Cutting tool manufactured according to the method of claim 1, characterized in that before machining the beads have a circular segment cross section.
4. Cutting tool according to claim 3, characterized in that, after machining the beads, it appears like a metal cylinder, the surface of which is provided with cutting and creasing threads tooled in said beads of material.
5. Cutting tool according to claim 3, characterized in that the mechanical characteristics of the bead material are different from the characteristics of the metal cylinder.
6. Cutting tool according to claim 5, characterized in that the beads of material are made of a metal alloy deposited by micro-spraying.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH2595/85 | 1985-06-19 | ||
| CH2595/85A CH666219A5 (en) | 1985-06-19 | 1985-06-19 | METHOD FOR MANUFACTURING A CUTTING TOOL AND THE TOOL OBTAINED THEREBY. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1267074A true CA1267074A (en) | 1990-03-27 |
Family
ID=4237304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000511833A Expired CA1267074A (en) | 1985-06-19 | 1986-06-18 | Method for manufacturing a cutting tool and resulting tool |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS61293730A (en) |
| CA (1) | CA1267074A (en) |
| CH (1) | CH666219A5 (en) |
| DE (1) | DE3619765A1 (en) |
| ES (2) | ES8800094A1 (en) |
| FR (1) | FR2583669A1 (en) |
| GB (1) | GB2176720B (en) |
| IT (1) | IT1189747B (en) |
| SE (1) | SE8602711L (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3720203A1 (en) * | 1987-06-16 | 1988-12-29 | Franz Hofele | METHOD FOR PRODUCING A SPACE TOOL |
| DE3739792A1 (en) * | 1987-11-24 | 1989-06-08 | Fraunhofer Ges Forschung | Method and device for manufacturing cutting or stamping tools as well as cutting or stamping tool |
| CH678832A5 (en) * | 1989-04-14 | 1991-11-15 | Bobst Sa | |
| DE3937024A1 (en) * | 1989-11-07 | 1991-05-08 | Bielomatik Leuze & Co | DEVICE FOR PRODUCING INSERTS FOR SHIPPING SHELLS |
| FR2705273B1 (en) * | 1993-05-19 | 1995-07-21 | Komori Chambon | Rotary shaping device and method of manufacturing this device. |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3796851A (en) * | 1968-08-14 | 1974-03-12 | Bernal Rotary Syst Inc | Apparatus for making cylindrical dies |
| GB1322090A (en) * | 1971-12-31 | 1973-07-04 | Schuchardt R | Cutting apparatus and method of making such tools |
| US3952179A (en) * | 1974-05-08 | 1976-04-20 | Rockwell International Corporation | Rotary cutting die and method for its production |
| US3905283A (en) * | 1974-05-08 | 1975-09-16 | Rockwell International Corp | Improved rotary cutting die |
| JPS527859A (en) * | 1975-07-09 | 1977-01-21 | Tokyo Electric Co Ltd | Method of making press working dies |
| JPS5577425A (en) * | 1978-12-06 | 1980-06-11 | Inst Tech Precision Eng | Working method of cutter tool by electrical discharge |
| DE7905247U1 (en) * | 1979-02-24 | 1989-03-30 | Winkler & Duennebier Maschinenfabrik Und Eisengiesserei Kg, 5450 Neuwied, De | |
| DE3047886A1 (en) * | 1979-12-20 | 1981-10-29 | The Fujikura Cable Works, Ltd., Tokyo | METHOD FOR PRODUCING A PUNCHING TOOL AND PUNCHING TOOL PRODUCED BY THIS METHOD |
-
1985
- 1985-06-19 CH CH2595/85A patent/CH666219A5/en not_active IP Right Cessation
-
1986
- 1986-04-14 FR FR8605281A patent/FR2583669A1/en active Pending
- 1986-04-18 IT IT12467/86A patent/IT1189747B/en active
- 1986-04-29 GB GB08610411A patent/GB2176720B/en not_active Expired
- 1986-05-16 JP JP61112437A patent/JPS61293730A/en active Pending
- 1986-06-12 DE DE19863619765 patent/DE3619765A1/en active Granted
- 1986-06-18 CA CA000511833A patent/CA1267074A/en not_active Expired
- 1986-06-18 SE SE8602711A patent/SE8602711L/en not_active Application Discontinuation
- 1986-06-19 ES ES556295A patent/ES8800094A1/en not_active Expired
-
1987
- 1987-05-12 ES ES1987296527U patent/ES296527Y/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB8610411D0 (en) | 1986-06-04 |
| ES8800094A1 (en) | 1987-10-16 |
| GB2176720B (en) | 1988-05-11 |
| ES296527Y (en) | 1988-04-16 |
| SE8602711L (en) | 1986-12-20 |
| ES556295A0 (en) | 1987-10-16 |
| CH666219A5 (en) | 1988-07-15 |
| FR2583669A1 (en) | 1986-12-26 |
| DE3619765C2 (en) | 1991-02-14 |
| GB2176720A (en) | 1987-01-07 |
| IT1189747B (en) | 1988-02-04 |
| DE3619765A1 (en) | 1987-01-02 |
| IT8612467A0 (en) | 1986-04-18 |
| JPS61293730A (en) | 1986-12-24 |
| ES296527U (en) | 1987-10-16 |
| SE8602711D0 (en) | 1986-06-18 |
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| MKLA | Lapsed |