Method of making pre-stressed braided gauze

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and may be used for producing braided gauzes. Proposed method comprises forming first unit helices by set of blades to preset length at preset pitch and expending them by expansion mechanism in helix axes to preset pitch defined by claimed relationship. forming second unit helices by second set of blades arranged opposite the first set at opposite side of produced gauze with shift relative to first unit helices through gauze pitch to ensure preset pitch in continuous rotation of helices. Said helices slide from blades to get braided into expanded helices of the first set to make gauze fragment. Length of said helices is selected appropriately. First unit helices are released from expansion mechanism and shifted to open the zone. Second unit helices are cut in said zone to cut finished gauze fragment to be displaced for connection with the next fragment. Gauze next fragment and connection helix are made, for the latter to be braided in the last helix of the next fragment and to the first helix of previous fragment over the entire length of all helices. Cycle is reiterated unless required length of gauze is produced.

EFFECT: production of fine gauzes.

4 cl, 2 dwg

 

The invention relates to the production of woven metal mesh and allows you to weave fine mesh for the manufacture of a wire material of a wire with diameter d≥0.2 mm and the ratio of the diameter of the helix D to the diameter of the wire 9÷10 or more.

There is a method of weaving nets (RF Patent for the invention №2010653 "Way of weaving nets, Eskin I.D., Kempinski L.A., 5 B21F 27/02, with priority from 15.04.94 g.. Published. Bull. No. 7, 15.04.94 g), namely, that pornoamatuers block spirals round cross-section located relative to each other on two grid spacing, which are recorded accurately in the guide in the position which they occupy in the finished grid, and are cut to the specified length, then the offset mechanism of formation of spirals on the grid step is forming another block spirals grid being formed, rotate and continuously sliding with knives mechanism of morphogenesis, woven into the previously formed coil and the first coil previously manufactured fragment of the mesh, moving the guide strictly in the direction of the axes of the spirals, then the last block of the spirals is cut to a predetermined length and offset of the finished portion of the grid in the direction perpendicular to the axes of the spirals in such a position that the first helix of the finished fragment of the mesh could weave on the last spiral again produced a fragment of the grid.

The disadvantage of this method is that when forming the blanks for the manufacture of products from wire material, each layer of mesh before placing a workpiece has to stretch in the plane of the mesh in two mutually perpendicular directions along the axes of the spirals and perpendicular to them, so that adjacent coils of the spirals came into direct contact. It is especially difficult to do when the workpiece is formed from a continuous strip of the grid.

This way the technical nature closest to the proposed and adopted for the prototype.

The aim of the invention is to provide a method of manufacturing a woven mesh for use for the manufacture of products from wire material substantially simplify the technology of forming blanks of the individual layers of the grid or from a continuous strip of mesh due to the exclusion of pre-stretching of the grid directly when laying her in the workpiece, as well as improving the damping properties of articles made of wire material.

This objective is achieved in that a method of manufacturing a pre-stressed braided mesh, namely, that pornoamatuers block of n coils arranged relative to each other on two grid step is forming another block is n+1 spirals grid which, being formed, rotate and continuously sliding with knives mechanism of morphogenesis, woven into the previously formed a spiral, ready a fragment of the mesh is cut to a predetermined length and offset of the finished portion of the grid in the direction perpendicular to the axes of the spirals, characterized in that the spiral of the first block termoobrabotka on your block knives their mechanism of formation of spirals to a predetermined length increments t1=t-Δtypo where t - step spirals ready mesh, Δtypo increase the pitch of the helix due to residual elastic strain spirals block in the finished grid, spiral block stretch mechanism for stretching in the direction of the axes of the spirals to step tp=t1+Δtyp, where tp is the pitch of the spirals of the block, the stretched mechanism Δtyp - elastic increment of the spiral when the stretching mechanism to stretch, thermoabrasion on the block of knives of the second mechanism of formation of spirals, located opposite the first mechanism of formation of spirals on the other hand made mesh, spiral second block that is offset from the spirals of the first block on the grid step, and the step of these spirals t2=tp, these spiral continuously revolving and sliding with knives, woven into the stretched spiral of the first block, and the length of the helices, which form a fragment of the mesh, are selected in such a way that when the cutting portion of the grid mechanism of the cutting on each side of the cut would only spiral formed by the mechanism of formation, located on the side of the grid, and the spiral was TRASALIS the ends of the housings of the knives and the lengths of the spirals of the finished portion of the grid were the same, i.e. ready a fragment of the mesh was in the form of a rectangle, release the spiral of the first block from the mechanism of stretching and moving them, freeing the area where the cutting spirals of the second unit, cut off the finished fragment of the mesh on the mechanisms of formation of spirals and shift finished a fragment of the mesh in the position where this fragment can be connected with further connecting spiral, made subsequent fragment of the mesh, on his knife form the connecting helix with a pitch t3=t that is intertwined in the last spiral of the subsequent fragment and the first helix of the previous fragment over the entire length of these spirals, subsequent piece and connecting the spiral cut on the mechanisms of formation of spirals, a new fragment of the mesh formed of two fragments is moved to the position where it can be connected with a new subsequent fragment and the cycle is repeated until will not be made strip of mesh required length.

In the case of spirals with large ductility in bending at the end of the formation of the spirals of the first block they are on the machine table can be in the position uncomfortable to capture them what echanism stretching.

Therefore, in this case, the offset on the table of the machine is carried out in the guide, made the removable cover mounted on the machine table, which is removed after the capture of the spirals of the first block mechanism stretching spirals and tension.

In addition, the mesh may be woven from spirals round cross-section, with a step t≈D, where D is the diameter of the spiral, is made of a different view of a wire with diameter d≥0.2 mm and the ratio D/d=9÷10 or more.

The proposed method can produce a fine mesh, suitable for the manufacture of products from wire material, as the first block formed spirals strict tensile spiral forces in position convenient for interweaving them in spirals of the second block.

In the finished mesh spiral of the first block elastically stretched, and a spiral second blocks elastically compressed and the compression force equal to the force of tension. Each turn of the spiral is pressed to contact with him round the neighbouring spiral force equal to the force, stretching or compressing the coil divided by the number of turns of the spiral, i.e. the finished net is tensioned, the locking spiral from displacement, and it is convenient to form the billet.

Even if for some reason there was a shift of spirals in the grid to return to its original stress state sufficient is about to attach to the net tensile stress in the direction perpendicular to the axis of the spiral when the spiral in place to remove the effort and it will be convenient to form the workpiece.

The pressure at each other in contact in the grid turns to a certain extent, can remain in the finished product, and this will increase its damping properties.

In addition, the proposed method can be used to produce pre-tense mesh Netting.

In this case, the blades form a spiral cross section used in the mesh Netting.

Manufacturer Rabitz proposed method dozens of times will increase the productivity of its production and application of prestressing Rabitz will improve the exterior fences and fences.

All of the proposed methods provide waste-free manufacturing a woven mesh.

The features distinguishing the claimed technical solution to the prototype, not identified in other technical solutions.

The proposed methods are illustrated by the figures.

Figure 1 shows a diagram of a device for implementing the method. Fragments of a grid conventionally outlined with a thin line. Coils of wire in Fig. is not shown.

Figure 2 shows a section along a - a in figure 1 for the case where the offset table of the machine formed by the spirals of the first block is in the guide removable lid.

Mechanism 1 formoobrazovanie what I spirals (see 1) first forming wire 2 of the first block 3 of the n coils 4 a circular cross-section and spaced spiral t1, located in block 3 in increments of two grid steps.

Spiral 4 captured by stretching mechanism 5 and elastically stretched in the direction of the axes of the spirals until the pitch of the helix becomes equal to tp. Mechanism 5 holds helix 4 in this position. Turn on mechanism of formation 6, which generates a new block 7 of n+1 spirals 8 step spiral t2=tp, offset coils 4 on the grid spacing. Helix 8, which is continuously being formed on the blades of the mechanism of formation 6 (knives of Fig. not shown), rotating and sliding with knives, woven in a spiral 4 on all their free length. The mechanism of formation 6 is turned off. The mechanism of stretching 5 releases helix 4 and is discharged from the working field. Fragment 9 cutting device 10 is cut (note that this mechanism is structurally may be made in the form of two guillotine shears 11 and 12, of which the scissors 11 cut helix 4, and the scissors 12 cut spiral 8) and mesh under the action of the internal elastic forces is compressed in the direction of the axes of the spirals so that the spiral 4 remain elastically stretched, and helix 8 elastically compressed forces, equal in magnitude, and post tension in the grid, and the step of spirals in the finished slice 9 grid is ranovitsa equal t. Fragment 9 the mechanism for moving the grid 13 is moved to the position where the fragment (assigned item 14) can be connected with the following in order of manufacturing fragment 9 connecting the coil 15.

Form the following fragment of the mesh 9 and cut it. On his knife 16 (figure 1 knife shown conventionally) form connecting the coil 15 with the step t3=t that is intertwined in the last helix 17 of the next segment 9 and the first spiral 18 fragment 14 over the entire length of these spirals. Connecting the coil 15 is cut from the mechanism of morphogenesis 1. The spiral cutting device 15 in Fig. is not shown. When the small diameter of the wire helix may simply perekalivatsja.

Figure 1 shows the grid production when ready two pieces of mesh, which is assigned to item numbers 14 and 19 and a new fragment of the mesh 20, formed of these two fragments, connected by a spiral 15, moved into a position where it can be connected with a new subsequent fragment (figure 1 shown in the process of formation and is marked with the position 9). The described cycle is the production of a new fragment of the mesh and connect it with the prepared fragments repeat until will not be made strip of mesh required length.

In addition, in the case where the spiral grids have greater flexibility and bending at the completion of formation of the spiral is th 4 they can take on the table 21 of the machine (see 2) the position is uncomfortable for them to capture the stretching mechanism 5, the table 21 is fixed removable cover 22 with the guides 23, in which when forming the moving spiral 4. After completion of the process of formation of these spirals, their capture and stretching mechanism 5, the cover 22 is removed, and then the process of manufacturing grid continues as described above.

Note that when forming helices 8 and their impact on helix 4, the cover 22 is not needed as guides for cables 8 are spiral 4.

The advantages of the proposed method of manufacturing a woven mesh following:

the proposed method can be used with high performance to produce fine braided pre-tense the grid, which can be used as a basic element for the manufacture of large and medium dimensional products from wire material, and products with small dimensions, as a reinforcing element. In all these cases, the application of this grid increases the strength of the products, improve their oprahfication characteristics and simplifies the manufacturing technology of these products can significantly reduce the amount of manual labor in the manufacture of articles made of wire material and allows to extend the range of parameters of the wire and the spiral used for manufacturing these products, considerable is to reduce the cost of their production and to expand the scope of their application;

all values in the steps of the spiral - t1, tp, t2, t can be determined by calculation, including in the case of t=D, commonly used in the manufacture of articles made of wire material;

as mentioned above, the application of the proposed method for the manufacture of mesh Netting allows dozens of times to increase the productivity of its production in comparison with the method, when the mesh Netting is made of interwoven spiral after spiral;

the proposed methods can also be made braided mesh used in construction for coating large surfaces as well as wicker mesh for reinforcing articles made of polymer. The use of these nets will simplify the process.

1. A method of manufacturing a pre-stressed braided mesh, comprising forming the first block of n coils arranged relative to each other on two grid step, forming a second block of n+1 spirals grid, which at the time of forming rotate continuously slides with knives mechanism of formation and woven into the previously formed coil with the getting ready portion of the grid cutting it to a predetermined length and offset of the finished portion of the grid in the direction perpendicular to the axes of the spirals, characterized in that the spiral of the first block thermoabrasion through the block of knives, their mechanism of formation of spirals to a predetermined length increments t1=t-Δtypo, where t - step spirals ready mesh, Δtypo increase the pitch of the helix due to residual elastic strain spirals block in the finished mesh, stretch through the mechanism of stretching in the direction of the axes of the spirals to step tp=t1+Δtyp, where tp is the pitch of the spirals of the block, the stretched mechanism Δtyp - elastic increment of the spiral when the stretching mechanism to stretch, and forming the second unit coils carried out on the block of knives of the second mechanism of formation of spirals, located opposite the first mechanism of formation of spirals on the other hand made of mesh, with an offset from the spirals of the first block on the grid step and the providing step these spirals t2=tp with continuous rotation of the spirals, which slides with knives and woven into the stretched spiral of the first block with the formation of a fragment of the mesh, and the length of the helices, which form a fragment of the mesh, selected so that when the cutting portion of the grid mechanism is cut from each side only cuts off the spiral formed by the mechanism of formation, located on the side of the grid, and spiral cuts at the ends of the housings of the knives with the same length all spirals ready fragment of the mesh with the getting ready portion of the grid in the shape of a rectangle, release the spiral of the first block from the mechanism Rast is the position and shift with the release zone, which is the cutting off of the spirals of the second unit, cut off the finished fragment of the mesh on the mechanisms of formation of spirals and shift finished a fragment of the mesh in the position in which this fragment can be linked with subsequent fragment by connecting a spiral, made subsequent fragment of the mesh form on your knife connecting helix with a pitch t3=t that intertwine in the last spiral of the subsequent fragment and the first helix of the previous fragment over the entire length of these spirals, with subsequent piece and connecting the spiral cut on the mechanisms of formation of spirals, and the new fragment of the mesh formed of two fragments, move to the position which it may be connected with a new subsequent fragment to obtain a strip of mesh required length.

2. The method according to claim 1, characterized in that the offset table of the machine spirals of the first block during their formation is carried out in the guide, made the removable cover mounted on the machine table, which is removed after the capture of the spirals of the first block mechanism stretching spirals and tension.

3. The method according to any one of claims 1 and 2, characterized in that the mesh weave of spirals round cross-section, with a step t=D, where D is the diameter of the spiral, made of nagartovannyh wire with diameter d≥0.2 mm and the ratio D/d=9÷10 or more.

4. The method according to any one of claims 1 and 2, characterized in that the knives forming mechanisms form a spiral cross section used in the mesh Netting.



 

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EFFECT: optimal fixation of slope is achieved, as well as damage danger is reduced.

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FIELD: process engineering.

SUBSTANCE: invention relates to machine building and may be used for producing braided gauzes. Proposed method comprises forming first unit helices by set of blades to preset length at preset pitch and expending them by expansion mechanism in helix axes to preset pitch defined by claimed relationship. forming second unit helices by second set of blades arranged opposite the first set at opposite side of produced gauze with shift relative to first unit helices through gauze pitch to ensure preset pitch in continuous rotation of helices. Said helices slide from blades to get braided into expanded helices of the first set to make gauze fragment. Length of said helices is selected appropriately. First unit helices are released from expansion mechanism and shifted to open the zone. Second unit helices are cut in said zone to cut finished gauze fragment to be displaced for connection with the next fragment. Gauze next fragment and connection helix are made, for the latter to be braided in the last helix of the next fragment and to the first helix of previous fragment over the entire length of all helices. Cycle is reiterated unless required length of gauze is produced.

EFFECT: production of fine gauzes.

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