RU33888U1 - Wire feeder - Google Patents

Description

2003123954

IjlipllilpllilplllPI

Corrugated wire feeder

The utility model relates to the fields of technology that use various wires in the manufacturing process, mainly to welding equipment for mechanized wire feeding.

Various types of wire feed devices are known, including a drive roller with a groove.

In the known wire feed devices, two pairs of rollers are also used, which are interconnected by gears mounted on each shaft with a roller.

Such an all-wheel drive two-pair roller mechanism suffers from a number of significant disadvantages, which are as follows.

It is impossible to maintain equality of linear velocities between the rollers in each pair and, even more so, between pairs of rollers, which leads to slipping (slipping) of the rollers with high linear velocities when the wire is crimped weakly and the wire feed stability is impaired, or one of the pairs is braking and the rollers are slipping and resistance to pushing the wire by another pair of rollers during normal wire crimping.

A further increase in the efforts of crimping the wire between the pairs of rollers in order to improve the stability of its supply required further complication of the design of the mechanism and an increase in the power of its electric drive, since at the same time, it became necessary to combat the effect of “swelling of wire, for

23K 9/12

overcoming of which required the introduction of a special assembly of guide plates into the feed mechanism, containing a guide plate with a guide slot, covering the slot to form a channel for the wire to pass through the entire device (between pairs of rollers, before and after them) (patent of Dze Lincoln Electric Company В23К9 / 12 No. 2125926).

Despite the fact that such complications of the design of the mechanism somewhat increase the stability of the wire feed, they do not exclude drawbacks, the main of which are expressed in the absence of synchronism of the linear speeds of the feed rollers, in the presence of pin contacts between the wire and the feed

rollers, which do not allow the wire to report significant pushing forces, in the absence of concomitant careful straightening of the wire, in the increased power of the electric drives, in a significant complication of the mechanism and an increase in its overall dimensions.

The closest in technical essence to the claimed utility model is the device used to feed the welding wire, which contains a drive roller with a working groove, a mechanism for pairing the wire with a working groove of the drive roller, and a wire dressing mechanism (RF Patent No. 2012460 V 23K 9/12).

The disadvantages of the device include the inability to inform the wire of significant pushing forces with

using drive rollers of traditional diameters, insufficient wire dressing.

The objective of the utility model is to create an effective and reliable device for feeding wire.

The technical result consists in the fact that increased pushing forces are achieved, necessary for feeding wires over long distances, high-quality dressing of wires. In addition, the simplification of the design, reducing the overall dimensions of the feed mechanisms, their

J (

manufacturing costs, expanding technological capabilities and applications.

A utility model is a device containing a drive roller, a mechanism for interfacing a wire with a working groove of the drive roller, a wire dressing mechanism. The device differs from the known one in that the drive roller with a groove is made in the form of an intermediate rotating support, and the coupling mechanism is made in the form of a mechanism for pushing the wire into the working groove and consists of two pressing elements, which are end stops for the wire, located on both sides of the zone pairing wire with a drive roller. The pressing elements are mounted with the possibility of movement relative to the drive roller. The wire straightening mechanism is made in the form of a thrust element mounted on the device’s body, coming into contact with the wire after it comes out of contact with the drive roller and located in the plane of the wire bend at an external angle of at least 0.5 ° to the tangent to the circle passing through the point of exit of the wire from the interface with

water roller.

.Wire feed mechanism, wire indentation mechanism

into the working groove of the drive roller and the wire straightening mechanism are made in the form of a three-functional single unit.

Both pressing elements can be made in the form of rollers or in the form of bushings with the possibility of movement in the plane of bending of the wire and along the wire.

One of the pressing elements can be made in the form

not a spring-loaded roller, but another in the form of a bushing.

At least one stabilizer of the position of the wire pressed into the working groove of the drive roller can be additionally installed in the device

The stabilizer can be made in the form of a block with a radius of curvature of the working end, describing the outer radius of curvature of the wire, with a length of at least equal to two diameters of the wire, and at least equal to half the circumference of the drive roller and installed before the wire leaves the interface with the working the groove.

the drive roller can be made in the form of a multifaceted profile, in cross section having the number of working surfaces equal to the number of faces.

The wire position stabilizer can also be made in the form of a flat tape (strip), one end of which is fixed and comes into contact with the wire at its exit from the working groove of the drive roller, the other end is connected to the tension mechanism, while the tape bends around at least one eighth of the outer circumference of the drive roller and at least half of its circumference.

In some cases, the drive roller is made in the form of a screw and contains a working groove made in the form of one turn with a pitch of at least equal to the diameter of the wire; while the bushings of the mechanism for pushing the wire into the working groove are made in the form of guide and receiving elements located in different planes with an axis offset of at least equal to the pitch of the working groove on the drive roller and having lateral movement by at least equal to the diameter of the wire.

The device may comprise at least two indentation mechanisms located around one drive roller, allowing simultaneous feeding of a number of wires equal to the number of indentation mechanisms.

In FIG. 1 shows a variant of the device, in FIG. 2-23 are other possible device options.

The device (Fig. 1), contains a drive feed roller 1 with a working groove 2, which is interfaced with the wire 3 in the section "a-b using the pressing elements 4 and 5 of the pressing mechanism (not shown). The pressing elements can be made both in the form of rollers 4 and 5 (Fig. 1), and in the form of bushings 8 and 9 (Fig. 2). They can be pairwise identical (Figs. 1 and 2) and different in pairs (Figs. 3 and 4). The pressing elements are located on both sides of the diametrical axis of the drive roller 1 passing through the section .. "a-b at the same or different distances from it. The length of the section "a-b, in which the wire 3 is in tight contact with the working groove 2, depending on the diameter of the wire 3 and the required feed forces, ranges from equal to one diameter of wire 3 (Fig. 2-4 and 6) to equality the full length of the working groove (Fig. 8 and 9). The wire 3 can protrude from the groove 2 above the surface of the drive roller 1 (Fig. 1-5, 8 - 21, 22) or be immersed in it (Fig. B, 7 and 22). In variants of devices in which the longest sections of the interface “a-b between points b and 7 are provided for maintaining the pairing of the wire 3 with the working groove 2 and preventing“ swelling of the wire before its exit (before point 7) from the interface with the drive roller 1, is installed a stabilizer 10 of the position of the wire, which, describing its outer radius, fits snugly against it (Fig. 10). The same stabilizer of the position of the wire 3 can be installed after the input of the wire 3 in conjunction with the drive roller 1 (Fig. 11). Can also be successfully used stabilizers in the form of rollers 16 (Fig. 12 and 13). In order to maintain reliable pairing of the wire 3 with the working groove 2, having the length a-b equal to half the perimeter of the drive roller 1, the installed stabilizer 12 has a working end face of the same length and describes the outer radius of the wire 3 pressed into the groove 2 (Fig. 14 ) For the transmission of the driving feed roller 1 significant pushing forces to the wire 3, a variant of the stabilizer 13, made in the form of a tape or strip (Fig.15-17) with fixing one of its ends before the point 7 of the wire exit from the interface with the drive roller 1 and securing the other end to the tension mechanism 14. The tension mechanism 14 provides a snug fit of the stabilizer tape 13 to the outer surface of the wire 3, the ability to change the length of the section "a-b between points 6 and 7

pairing the wire 3 with the working groove 2 and the drive roller 1 from equal to one eighth and one fourth of the length of the working groove 2 (Fig. 15-17) to equal half the length of the working groove 2, when the stabilizer - tape 13 replace the stabilizer block 12 (Fig. 14) .

To ensure adjusting movements of the tension mechanism 14 (Fig. 15 and 17), it is equipped with a radial stroke device (not shown) and a screw pair 15. The design of the stabilizer 19 (Fig. 18) of the position of the wire 3 in the groove 2 for cases of increased abrasion of its working end may include a profile with a cross section made in the form of a polyhedron with the number of faces at least equal to four. Such a stabilizer is equipped with a rotary device (not shown), with the help of which it is possible to replace one working end with another.

To supply relatively thin wires, an embodiment of the method is provided when the wire 3 bends along a helical path the working surface of the drive roller, which is made in the form of a single-turn screw with a pitch "e between the beginning and end of the groove 2, equal to at least one diameter of the wire 3 ( Fig. 9). In this embodiment, the tight coupling of the wire 3 with the groove 2 can be ensured by tensioning the force Q of the wire 3 when it is unwound from the coil using a traditionally used coil brake device (not shown).

To prevent the possible "swelling of the wire before it leaves the interface and after entering the interface with the drive roller, a stabilizer can be installed, for example, in the form of a roller 16 (Fig. 19), or any other design from the device variants listed above, etc.

If it is necessary to feed more than one wire of one or different diameters, the device for implementing the method contains, respectively, two or more pressing mechanisms (not shown), FIG. 20-22.

egzaz y- / 6

1 contains a working groove 2, the parameters of which make it possible to place at least one wire 3 of the largest diameter in its cross section (Fig. 23).

The utility model works as follows.

To the drive roller 1 (Fig. 1, 3, b) with a working groove 2, a wire 3 is unwound from a coil (not shown) using the first pressing element 4 of the pressing mechanism (not shown) at an external angle of 5 ° (Fig. 3, 6) to the tangent 17 to the circle passing through the entry point b of the wire 3 in conjunction with the drive roller 1. With a force P equal to the bending force, by pressing the element 4, push the wire 3 into the working groove 2 of the drive roller 1.

Further, using an electric drive (not shown), the rotation of the drive feed roller 1 is turned on; in this case, the wire 3 from the force P of pushing it through the point "c into the working groove 2 bends, enters into tight conjugation with the groove 2 in the section" a-b, equal to the diameter of the wire (Fig. 3 and b) between points b and 7 and having a high coefficient of adhesion to the groove 2 (for example, in cases where the groove 2 is wedge-shaped), acquires translational movement, leaves the interface with the drive roller 1, through point 7, comes into contact at point "d with the second pressing element 5 or 9 which bends the wire 1 in the opposite direction and directs it under an external angle ai equal to 0.5 ° to the tangent 18 passing through the point 7 of the exit of the wire 3 from the interface with the drive roller 1. In this case, the wire 3 is carefully adjusted and fed in the desired direction.

The pressing elements can be made both in the form of rollers 4 and 5 (Fig. 1), and in the form of bushings (Fig. 2). Combination options are also possible when one of the pressing elements is made in the form of a roller, and the other in the form of a bushing (Figs. 3 and 4).

All of the listed options for the execution of the pressing elements 4 and 5 can be used when feeding wire 3 of the entire existing range of diameters.

depending on what pushing forces it is required to communicate to wire 3, it is guided by element 4 into the working groove 2 of the drive roller 1 at one angle or another and to the tangent 17 to the circle passing through point 6 of the input of wire 3 in conjunction with the drive roller 1.

In this case, the larger the angle a, the greater the effort is communicated to the wire 3.

In addition, the pushing forces imparted to the wire 3 also substantially depend on the length of the portion of the wire 3 located between the point “from the exit of the wire 3 from the contact with the pressing element 4 and the point 6 of the wire entering the interface with the working groove 2 of the drive roller 1. T. e., the shorter the length of this section, the greater the pushing forces are communicated to wire 3. At the same time, if the wire 3 is introduced through point b in conjunction with the working groove 2 and pressed with force P in the section "a-b with an area characterized by pinpoint conta that the wire 3 reported minimal kicking effort, and if in the area, characterized by linear contact - maximum kicking effort.

In the first case (Figs. 2-4 and 6), the section “a-b of pairing the wire 3 with the working groove 2 does not exceed one diameter of the wire 3 in length, even with a maximum force P of indenting the wire 3 with an element 4 or 8.

The bend obtained by the wire 3 at the entrance to point 6 is immediately eliminated when the wire 3 leaves point 7 by bending it back using element 5, which deflects the wire at an angle ai to the tangent to the circle passing through the exit point 7 of wire 3 from drive roller mates 1.

Thus, wire 3 is edited here.

In this case, as a rule, point b and point 7 of the wire 3 exit from the interface with the drive roller 1, almost coincide and are located on a slightly elongated section, but within the same wire diameter. The angles a and 1 in this case can be relatively small, and be at least 0.5 °, when the wire is sufficiently rigid or large in diameter and relatively straight. This option of pairing the wire 3 with the drive roller 1 can be successfully used when feeding wire, for example in welding machines. In the second case (FIGS. 1, 5, 7-19 and 21-22), the section “a-b of pairing the wire 3 with the working groove 2 of the drive roller 1 is longer than one wire diameter in length and can reach the full circumference of the drive roller. Moreover, the longer the length of the section "a-b", the less force P is required to press the wire 3 into the working groove 2, which contributes to a sharp decrease in the specific pressure on the wire 3 and eliminates its deformation in the cross section. This position is very favorable for flux-cored wires (for welding) or thin-walled tubes (in other areas of technology), as well as for solid wires of soft metals and alloys. Particular advantages are provided in this case when thin wires are fed over long distances with significant resistance to their passage in a given direction along flexible guide channels, for example, during semi-automatic welding with a fused electrode. Moreover, the significant resistance encountered by the wire at the entrance to the guide channel should be easily overcome by the superior pushing force imparted to the wire 3 in the section “a-b of its conjugation with the working groove 2, in addition, if the section“ a-b, located between the points the input and output b and 7 of the wire 3 from the interface with the drive roller 1 of considerable length, then to avoid weakening the pairing of the wire 3 with the groove 2 or even its exit from the groove ("expansion"), stabilizer 10 must be installed in front of point 7 ( ig, 10) to maintain the pairing of the wire 3 with the working groove 2 of the drive roller 1, If necessary, the same stabilizer 11 (Fig, 11) to maintain the position of the wire 3 in the groove 2 can be installed immediately after the input of the wire 3 to the point 6 of the pair with the groove 2 or

even be between both points b and 7 and occupy half the length of the working groove 2 along the length of its working end (pos. 12, Fig. 14).

In addition, to reduce friction, the stabilizers 10 and 11 can be replaced by a roller 16 (Fig. 12 and 13).

To straighten the wire 3, having a section “a-b mating with the working groove 2 in length exceeding one diameter of the wire up to a length equal to the length of the working groove, use a stop element 5 or 9 (Fig. 2, 3,5, 7-15, 17, 19, 21 and 22).

At the same time, the wire 3 coming out of the interface with the working groove 2 by reverse bending by the element 9 is directed at an external angle exceeding 0.5 ° to the tangent to the circle passing through the exit point 7 of the wire from the interface with the working groove of the drive roller 1

Due to the simplicity of the technical solution, the proposed utility model can be successfully implemented in cases where it is necessary to feed two or more wires of one or different diameters in a given direction (Figs. 18 and 19).

Claims (11)

1. The wire feed device using a drive roller, including a mechanism for pairing the wire with the working groove of the drive roller and the straightening mechanism of the wire, characterized in that the drive roller with a groove is made in the form of an intermediate rotating support, and the coupling mechanism is made in the form of a mechanism for pushing the wire into the working groove and consists of two pressing elements made in the form of end stops for the wire, located on both sides of the zone of pairing of the wire with the drive roller and with the possibility of x movements relative to the drive roller, the straightening mechanism of the wire is made in the form of a thrust element mounted on the device’s body, coming into contact with the wire after it comes out of contact with the drive roller and located in the plane of the wire bend at an external angle of at least 0, 5 ° to the tangent to the circle passing through the point of exit of the wire from the interface with the drive roller. 2. The device according to claim 1, characterized in that both pressing elements are made in the form of rollers. 3. The device according to claim 1, characterized in that both pressing elements are made in the form of bushings with the possibility of movement in the plane of bending of the wire and along the wire. 4. The device according to claim 1, characterized in that one of the pressing elements is made in the form of a non-spring-loaded roller, and the other in the form of a bushing. 5. The device according to claim 1, characterized in that it further comprises at least one stabilizer for the position of the wire pressed into the working groove of the drive roller. 6. The device according to claims 1 and 5, characterized in that the stabilizer is made in the form of a block with a radius of curvature of the working end that describes the outer radius of curvature of the wire, with a length of at least equal to two diameters of the wire, while the stabilizer is installed before the wire exits pairing with the working groove. 7. The device according to claims 1 and 5, characterized in that the stabilizer wire in the working groove of the drive roller is made in the form of a multifaceted profile, in cross section having the number of working surfaces equal to the number of faces. 8. The device according to claims 1 and 5, characterized in that the stabilizer of the wire is made in the form of a flat tape (strip), one end of which is fixed and comes into contact with the wire at its exit from the working groove of the drive roller, and the other end is connected with tensioning mechanism, while the tape goes around at least one eighth of the outer circumference of the drive roller and at least half of its circumference. 9. The device according to claim 1, characterized in that the drive roller is made in the form of a screw and contains a working groove made in the form of one turn with a pitch of at least equal to the diameter of the wire. 10. The device according to claims 1 and 8, characterized in that the bushings of the mechanism for pushing the wire into the working groove are made in the form of guide and receiving elements located in different planes with an axis offset of at least equal to the pitch of the working groove on the drive roller and having the ability to transverse movement by an amount at least equal to the diameter of the wire. 11. The device according to claim 1, characterized in that it includes at least two indentation mechanisms located around one drive roller, allowing simultaneously to feed the number of wires equal to the number of indentation mechanisms.