A method for manufacturing a stamp and barbed cutting tape – Kazakhstan patent №22995

The use: during the manufacture of barbed tape used for the production of different types of reinforced barbed tape, in particular barbed wire Egoza and other types of barbed wire, which is used as the main element in the protective safety barriers and protective fences designed to prevent unauthorized penetration of sensitive sites.

The summary: manufacturing barbed tape is the fact that because of the continuous wide metal strip produced multiple barbed tape by punching the pair number of oval-shaped openings over the width of the provision at some distance from the axis of symmetry of each future barbed cutting tape and recessing staggered webs between the edges of adjacent oval holes along the length to form a large number of opposed pairs of cutting elements.

Penetration of oval holes and cutting the crosspieces between them is carried out successively in three stages. The first step is the punching of the pair of oval holes across the width of the provision in two rows. In the second, after advancing by one step the provision, cutting occurs in paired half cutting between adjacent tape lengthwise oval holes. In the third stage, after leading the provision for another half step, made cutting the remaining pair of jumpers on the other line location (the checkerboard pattern) in the blank. Stamp for manufacturing barbed cutting tape consists of a matrix and a punch, which contains several pairs of punching elements, each of which consists of two ovals in cross-section of finger punch members to pierce the oval holes in a provision, and rectangular sectional perforating elements for cutting webs between general oval holes in the strip. The first stamp arranged in two rows of finger punching a pair of oval elements, followed at a distance of one step of movement of the provision is the first row of half rectangular in cross-section breakdown of elements that is used to cut half of pair of crosspieces between the general length of the cutting oval holes, for which at distance even half step movement blanks are staggered with respect to the first row of the second row in the second half section of the rectangular punch elements for cutting webs remaining in the billet.

Technical advantages:

• The absence of deformation of barbed tape;
• There is no additional intermediate alignment operation for the latter;
• Continuity of production technology;
• Simplification of the stamp design.

The invention relates to metal products production, namely the snap and technologies used in the production of barbed tape, which are used as the main striking element in the barbed wire Egoza and a number of other types of reinforced barbed tape used as safety barriers designed to prevent unauthorized intrusion on sensitive sites.

Barbed tape typically is produced by cold pressing. In the traditional method of manufacturing a solid metal strip of provision, step by step promote a stamp shaped punches which are cut in the tape oval elements with opposite prong. Such a method of manufacturing the barbed tape is most common in the world.

There is commonly known method for manufacturing barbed tape, which consists of the fact that in a preform of a metallic galvanized tape from both sides uniformly penetrate symmetrical externally open recess jumper between them form a large number of opposed pairs of elements, each of which consists of a base and prongs, the tip of which are directed opposite to each other. The cutting edge of the barbed tape located at the outer sides of the element, and the tips of the prong are each of the angles formed between the outer side and the side of the element. For symmetric punching externally open recesses using a stamp which is composed of a stamp and punch and punching tools comprises penlight oval punch arranged in one line perpendicular to the direction of movement of the stamp model. Such a stamp allows manufacturing of barbed tape in one complete cycle of its operation [see the Patent of Ukraine № 41834 class B21F 25/00 published in 24.04.2001].

The main drawback of the above method of manufacturing the barbed tape is that its application is obtained when only one barbed cutting the tape that is not rational, since the power of the stamp is usually possible to produce several barbed tape simultaneously. To do this initial model prevents, which is a narrow metal strip that in its width allows producing only one band of barbed tape. To increased efficiency of the well-known method should be used as the initial model i.e. wide metal strip from which it was possible to simultaneously produce multiple barbed tape.

The main drawback of the following stamp is that it comprises only one pair of punches that is adapted for producing a barbed tape, which, as already noted, is not rational. To significantly improve the performance of the following stamp, it must be equipped with a large number of pairs of punches in the transverse direction.

From this point of view closest in its essence and attainable effect, which accepts as a prototype, is a technology for manufacturing barbed strip which is that of a continuous wide metal strip manufactured multiple barbed tape. This occurs by simultaneously punching the pair of oval holes amounts to the width and the model in several rows along the length of the model at some distance from the axis of symmetry of each future barbed tape. Simultaneous cutting staggered bridges between adjacent edges along the length of oval holes to form a large number of opposed pairs of barbed elements. Each of these elements consists of a base and oppositely directed prongs disposed on the outer sides of the element. Acute each of the prong are the angles that are formed between the outer side and the side of the element, wherein the webs formed while cutting the outer edge of the element a barbed tape and simultaneously the cutting edge is formed adjacent to the central portion of the barbed tape. For the implementation of this technology it is used a stamp, which consists of a matrix and a punch, comprising several pairs of punching elements. Each of them consists of two oval elements finger punch for punching oval holes in the strip between which the rectangular punch elements for cutting webs between adjacent oval holes in a metal band, and all the pairs of punch elements arranged to flatness are perpendicular to the direction of movement of the step model under the stamp. This allows the stamp from a single continuous metal strip to produce a broad multiple barbed tapes by simultaneously punching the pair of oval holes amounts to the width and the model in several rows along the length of the model at some distance from the axis of symmetry of each future barbed tape. Also simultaneous cutting staggered bridges between adjacent edges along the length of the oval holes to form a large number of opposing pairs of the cutting elements of the tape. This stamp is most similar in nature and effect is achieved, and therefore taken as a prototype [see The international application № WO00 / 01501 class B21F 25/00 published in 13.01.2000].

The main drawback of the following technique of manufacturing barbed tape is that the punching operation a significant amount of oval holes and cutting a large number of jumpers carried out simultaneously in the same location across the width of the model. This leads to excessive load on the model, because of which it is excessively deformed, or may even have a local or complete rupture of the metal. In both cases such damage to the integrity of the barbed tape is inadmissible. In this connection to introduce into the technology of binding aligning operation barbed tape plane for subsequent dense winding them onto spools.

The main drawback of the following stamp is its very complicated structure, since it includes punches between punches for punching holes that are arranged for cutting webs, and all the pairs of punches are complex without any gaps from each other in a line across the width of the stamp. This stamp is quite difficult to do, because of this it will automatically become expensive technological equipment, which in turn is reflected in the worse in the cost of barbed tape. In addition, random bend of a few barbed tapes in the area of finding a large number of punches, while punching oval holes and destruction of bridges can lead to jamming stamp or its complete breakdown.

The basis of the invention is to enhance the adaptability of simultaneous manufacture of multiple barbed tapes and simplify the design of the stamp while reducing its cost. As well as a significant reduction in the defect probability, while reducing the cost of products. This is achieved by separating in time and space operations oval holes punching and cutting of the bridges between them due to changing the stamp structure, in particular, the sequence and placement of working elements – punches for each technical operation in different planes along the length of the stamp.

This object is achieved by the fact that the technology for manufacturing barbed tape which is that of a continuous metal strip is made wider multiple barbed tape by punching the pair of oval holes amounts width preform at some distance from the axis of symmetry of each future barbed tape. Also the cutting staggered bridges between adjacent edges along the length of the oval holes to form a large number of pairs of opposing elements. Each of these elements consists of a base and opposing prongs disposed laterally outer member, and the tips of each of the prong are angles formed between the outer side and the side of the element. And while cutting the jumper element formed by the outer edge of one barbed tape and at the same time the edge of the central portion adjacent barbed tape. According to the proposal, punching oval holes and cutting the bridges between them is carried out successively in three stages, the first of which takes place penetration pair of oval holes across the width of the model in two rows. In the second, after leading the model to one step forward there is cutting half bridges between adjacent pairs along the length of the tape oval holes. In the third stage, after leading the model to another half step it cuts the remaining pair of jumpers on the other line position in the model.

This object is also achieved by the fact that the punch for producing barbed tape consisting of a matrix and a punch having punch elements of several pairs. Each of them consists of two oval in cross-section of finger elements punch for punching holes in a model of oval and rectangular in cross section for perforating elements common cutting bridges between oval holes in the tape. According to the proposal, the first stamp is arranged in two rows in a pair of oval cross-section finger-punching elements. Behind them at a distance of one step of movement of the model there is the first row of half rectangular in cross-section breakdown of elements to cut half of the pair of bridges between the general lengths of the oval holes model. Behind them on a half-step distance of model movement they are staggered with respect to the first row of the second row in the second half section of the rectangular punch elements for cutting webs remaining in the model. Step by step transformation of a solid wide metal strip a few barbed tapes occur at different times and in different areas, which does not increase the total production time. Since the barbed tape is completely manufactured in one cycle of the stamp operation. Also, it does not increase the size of the equipment. However, this technology eliminates all the disadvantages of the prototype, to give up a separate operation alignment barbed tape before winding them onto spools.

The proposed location of workers punching tools and the corresponding holes in the stamp matrix greatly simplifies its constructive exclude the of possibility of excessive straining or twisting barbed tape directly under the stamp. That is, this technology prevents the discontinuity of the process and avoids the reasons for failure of the punch. A significant simplification of the design of the stamp to reduce the cost, therefore, the cost of barbed tape obtained with its help. It is understood that in the stamp size, roundness punching elements (punches) may vary depending on the size of the barbed tape and the shape of its cutting elements, the distances between them, etc.

Further essence of the proposed technical solution is explained in conjunction with illustrative pictures, which shows the process sequence of manufacturing multiple barbed tapes with one continuous wide metal strip, namely:

• Figure 1 – continuous supply of broad tape (model) into the working area of the stamp;
• Figure 2 – the first stage is the punching pair of oval holes across the width of the model in two rows;
• Figure 3 – the second stage is cutting half paired bridges between general oval holes along the length of the model;
• Figure 4 – the third stage is the cutting of the remaining pair of jumpers another line location (the checkerboard pattern) in the model (final separation into individual barbed tape models);
• Figure 5 – the outlet of several ready-made barbed tape from the area of operation of the stamp;
• Figure 6 – the general view of the stamp and punch stamp proposed in the process of manufacturing multiple sharp and cutting tapes with one wide model. Single arrows indicate the direction of movement of the model along the working area of the stamp, double – direction of movement of the punch stamp. Roman numerals in Fig. 6 show the steps of converting a solid illet of several barbed tape, and under the Roman numerals there are changes of the models at appropriate stages.

The proposed method of simultaneous manufacture of a plurality of barbed tape is as follows. Solid wide tape – the model 1 fed into the working area of the stamp. At the first stage in the model 1 punch oval holes 2 over the entire width of the model 1 in two rows. After the penetration of these oval holes 2 preform 1 moves further into the die by one step, which is equal to the width of the elements 3 barbed tape 4. In the second stage, the cutting of the pair of jumpers 5 between general oval holes 2 along the length of the uncut portion of the model 1. Jumper 5 prevents excessive deforming preform. When cutting webs 5 on the second stage, at the first position again occurs punching oval holes 2 in the solid part of the model 1 which, when hit by movement of the stamp. After the cutting of the model 1, 5 bridges move forward into the stamp for the same step. The third step is the cutting of the remaining pair of jumpers 6, on the other line location (the checkerboard pattern) in the model 1. At this stage, the final separation of the billet 1 into separate piercing-cutting tape, which upon further incremental advancement of the model 1, out of the work area stamp and wound onto a bobbin (it is not shown because of the notoriety). At the same time, every step is repeated punching operations 2 and 5 bridges.

So, step by step production of several barbed tape 4 with consistent separation of the billet 1 in the space thus relieving pressure on the model 1. Proposed Stamp contains a matrix of 7 and 8. The punch punch 8 comprises a plurality of pairs of successive and different shaped punch elements. The first serially arranged across the die in two rows sequentially oval sectional punch elements 9 for punching oval holes 2 in the blank 1. The distance between the rows of oval punch element 9 is determined by the size of the pocket 10 barbed tape 4. At a distance of one step of movement of the billet 1 is oval in cross-section breakdown elements 9 situated in the lower back of the stamp first part of the rectangular cross-sectional breakdown elements 11 to cut part of the pair of jumpers 5 between contiguous to the length of the model 1 oval holes 2, in which the distance is still a half step movement of the model 1 staggered the second part of the rectangular cross-sectional punch members 12 for cutting the jumper 6 who stayed for the final separation of the billet 1 into separate and structurally fully formed prickly tape 4. The lower ends of the punch elements 9, 11 and 12 may be either flat or curved deep punches – it does not matter, because the technology does not affect the manufacturing barbed tape 4. All penlight perforating elements 9, 11 and 12 have a simple structure in different planes spaced along the length of the stamp, which simplifies the structure and increases its suitability for repair.

If the initial preform 1 was wider than the total width of multiple barbed tape 4, it or cut width to a certain size (for this stamp can be provided with cut-off stamps, which are not shown because of their notoriety), or made of edge portions barbed tape rare unpaired elements.

The essential difference between the claimed technologies of the previously acquainted is the fact that the punching operation and cutting of webs are separated in time and space due to the diversity in different planes punching stamp member. This difference makes it possible to fundamentally change the technology of making a few barbed tape with a solid billet, in particular to eliminate the deformation of barbed tape under the stamp, to simplify the production of the latter. None of the well-known producing methods of barbed tape are able to have similar properties, since all operations are performed in one place or in general, the technology allows producing only one barbed tape.

None of the well-known stamps for manufacturing barbed tape unable to have these properties, since all its elements are arranged along punch in a platitude across the width of the stamp.

The proposed technical solution tested in practice. The method and the stamp does not contain any elements or steps, that it would be impossible to recreate in the present stage of development of science and technology, in particular the production of barbed tape. So, the technology is acceptable for industrial applications, has certain advantages over the known methods and stamps because of the changes proposed stamps action on the model. All this confirms the achievement of the technical result of the claimed subject. In the sources of information there are not revealed similar methods and molds for the production of barbed tape with these essential features in the proposal and therefore relies so that can get legal protection.

The main technical advantages of the proposed technical solutions, in comparison with the prototype are the following:

• The absence of deformation barbed tape under the stamp due to the fact that the final separation into individual strips models takes place on its exit from the stamp;
• No need for an additional intermediate step alignment barbed tape due to the absence of excessive deformation of the latter;
• The continuity of the manufacturing technology of the barbed tape to the exclusion of the probability that feeds into the holes of the stamp matrix;
• Simplification of the design of the stamp of the punch in the space diversity.

Social benefits from the use of the method and the stamp for manufacturing barbed tape, in comparison with the prototype, obtained by increasing the number and reliability of protected sites as a result of cheaper barbed tape, and hence the barbed wire Egoza, which is made on the basis of barbed tape. This makes the safety barriers available to a wide range of consumers.

The economic effect from the implementation of the invention, in comparison with the fulfilment of well-known decisions, is obtained by reducing the cost of the barbed tape and stamps for their manufacture.

After describing the above mentioned techniques and the stamps for manufacturing barbed tape, specialists in the very area should be apparent that all of the above is merely illustrative, and not limiting, having been presented by this example. Numerous modifications and other embodiments of the method, in particular the number of received barbed tape, the use of edge models and etc., may vary in different proportions. Also stamp may vary structurally, in particular to the number of punches, their design, the distance between them, the use of preform edges or cutting. All these changes, of course, within the scope of one of ordinary and natural approach in the given area and they are considered within the scope of this technical solution.

The quintessence of the proposed technical solutions is what transform a continuous operation broad model into separate barbed tape occurs in stages at different times due to the proposed changes in the stamp design, and it is this fact allows you to purchase the proposed technology and other listed advantages. The change and the use of only certain phases of manufacturing technology barbed tape, or individual components of the stamp, of course, limit the range of the above advantages, and therefore cannot be considered as new technical solutions in the given area. As another method is similar to the described way and the stamp will no longer require any creativity of designers and engineers, and therefore cannot be considered the results of their creative activity and new intellectual property to be protected by security documents.