SE526373C2 - Wire drawing roll where the rollers are mounted in separate holes in the same housing - Google Patents

Abstract

The present invention relates to an arrangement, draw plate and roll for the cold working of wire. The arrangement comprises a typical draw plate housing in which two roll shafts are mounted. The roll shafts have an appropriate profiled shape, e.g. oval or round, and the wire is rolled through the housing. The rolls are idling rolls and the wire is drawn through the rolls, although in the absence of contact with the draw plate housing.

Description

20 on a. ..O ...: n - o o - b III oo š «a: = L are =» nnoo Ao o: nu on ro coon 5262 573 In Japan, in the early 1960s, a new tool for cold working of wire, called "roller-dies", where the friction conditions are significantly more favorable than with conventional draw disc drawing. The tool consists of two pairs of non-driven, calibrated rollers arranged at 90 degrees in relation to each other.

The process of drawing wire through non-driven rollers will be referred to in this document as drawing rolling.

In tensile rolling, in most cases part of the frictional force lies in the direction of tension, in contrast to tensioning disc tensioning, where the entire frictional force acts opposite to the direction of tension. This is explained by the fact that in the tensile rolling, a neutral plane can be defined, where appropriate, with the property that the shear stresses which the friction gives rise to are on either side of the neutral plane directed in opposite directions. The shear stresses during traction sheave drawing are directed in the same direction along the entire contact length between wire and traction sheave.

In practical studies, the tensile rolling technique has been shown to have e.g. the following advantages over traction sheave drawing: ° Possibility of higher traction speeds 'Possibility of higher area reduction per draft' Possibility of higher total area reduction before soft annealing ° Possibility of needing less complex refrigerants and lubricants and their applications ° Possibility of temperature setting of refrigerants and lubricants quality-enhancing effects Despite the proven benefits of the new technology, the tensile rolling technology has not yet made its way onto the market. 526 573 .W 3 The main reason for this is the design weaknesses shown by the units available on the market. The Japanese originating units have above all caused major problems when it comes to adjusting the rollers in both height and sideways.

In addition, in some cases problems are reported with the oval wanting to turn before it enters the circular track. This can lead to the appearance of fin formations such as gives great roundness to the drawn thread.

It is also difficult to roll thin wires, and integrating existing roller dieworks (RDs) into existing wire rolling machines is associated with large investment costs due to their space-consuming construction.

Known RD plants can thus show problems with stability of shafts and bearings, which leads to quality and production problems and costly service needs.

SUMMARY OF THE INVENTION The main object of the present invention is thus to provide a device, tension plate and roller for cold working of wire which remedies or at least reduces the above-mentioned problems.

The present invention consists of an ordinary traction sheave housing in which two roller shafts are located. The roller shafts have a suitable profile shape e.g. oval or round and the wire is rolled through the drawbar housing. The rollers are non-driven and the wire is pulled through the rollers, but without contact with the drawbar housing.

The present invention does not include bearings or shafts according to known wire rolls and exhibits good stability. Furthermore, the device is adapted to be able to be mounted in existing wire drawing machines and thus adds a new dimension to these machines, namely to have the wire rolled. One can, at 10 15 20 yzs 0 0 g o 0 0090 000 OUOO c c o; 0000 oc 00 0000 ICCI i ß I Ü oaoc 0 0 onoo Q »o IIO oo nu 0130cc: oo 526 373 4 need, roll the wire, mounting a draw roll housing according to the present invention, or pull the wire, mounting a standard draw plate in the wire drawing machine.

The draw roller housing is suitably made of a durable, hard material, for example cemented carbide, while the rollers are made of a tougher, less durable material, the rollers being wear parts and can be replaced. Thus, the operator can also, by simply changing rollers from one profile shape to another, determine which shape he wants on the wire.

A particular object of the present invention is to provide a method and an apparatus in which an operator can choose whether a wire is to be rolled or drawn in a drawing bench.

The above objects are provided, according to a first aspect of the invention, with an apparatus for manufacturing wire comprising a housing having an inlet for feeding a metal wire having a first diameter and shape and an outlet for discharging said wire after processing said diameter. and / or shape, said housing is arranged to be mounted in a wire drawing device. The housing comprises a first and a second hole, or profiled socket, arranged to accommodate a first and a second roller. The first roller has a first profile and the second roller has a second profile. The first and the second roll are arranged to, between them, roll the metal wires so that the metal wires obtain a second diameter and shape according to said first and second profile.

The above-mentioned objects are provided, according to a second aspect of the invention, with a drawing plate for the manufacture of wire, the drawing plate being cylindrical and having a continuous, central, axial opening, through which a wire of a first dimension and shape can run. The pull plate further comprises a first continuous, radial and round hole, which is offset in a first direction so that an edge of said first hole ° [on. ' Beer 0000 I I; tølo: O IC 01 0 u 0 I c 0 I n 0 I b 0 u 00 oo 526 575. substantially coincides with a diameter of said traction sheave, and a second through, radial and round hole, which is offset in a second direction, substantially opposite said first direction so that an edge of said first hole substantially coincides with said diameter of said traction sheave.

Since the housing is arranged to be able to be attached to a wire drawing device, the wire drawing device can be extended with functionality for rolling wire. This allows an operator to choose whether to thread or roll the wire. In fact, at some blocks, or wire processing stations, the operator may choose to roll the wire to pull the wire in the same wire drawing device in subsequent blocks, or wire processing stations. According to one application, a first block may have two rollers with a first profile shape and a second block two rollers with a second profile shape.

The device also provides the ability to easily change rollers. Thus, different profiles can be used depending on the purpose of the rolling.

According to a preferred embodiment, the housing has the same shape as a traditional drawing board for wire drawing and is adapted to be mounted in a wire drawing bench.

The first and second rollers may have different types of profiles.

For example, the first roller may be oval and the second round, alternatively both rollers may have a round or oval profile. Other types of profiles are also conceivable.

According to a preferred embodiment of the present invention, the housing is cylindrical in shape and has a continuous, centrally, axially located passage. The passage comprises an entrance in which the wires run into the house and an exit for the rolled wire. 10 15 20 00 0000 00 00 0000 0 0 0 0 0 0 .0 0 z. :. .0L :): .0 0 .I 0000 0000 0 d0 000 00 0 526 373 6 The housing further comprises a first through, radial and round hole, which is offset in a first direction so that an axial edge of the mantle surface of said first hole substantially coincides with a diameter of said housing. The housing further comprises a second through, radial and round hole, which is offset in a second direction, substantially opposite said first direction, so that an axial edge of the mantle surface of said first hole substantially coincides with said diameter of said housing.

By this arrangement the rollers can be arranged in the housing so that the wire is pulled through the housing, without any contact with the housing itself, and rolled by rollers arranged in said first and second holes.

According to a preferred embodiment of the invention, the device further comprises a first and a second cylindrical roller, respectively, which are arranged in said first and second holes, respectively, where said cylindrical rollers comprise, sliding part, in axial direction, a first a profile part and a second sliding part. The first and second sliding parts are arranged to abut and slide against parts of the inner casing surfaces in said holes and sliding slats for opposite rollers, respectively.

When the wire is pulled through the passage, it presses against the profile parts on the rollers, which in turn press the sliding parts against the respective inner jacket surfaces in the holes. The rollers are thus allowed to roll when the thread is pulled and thus roll the thread.

The first and second rollers are arranged in said housing so that the profile parts coincide with said passage seen in axial direction. The profile parts thus cooperate and form a common profile for rolling the wire.

According to a preferred embodiment of the invention, the device comprises a cooling device arranged to cool said housing, and a lubricant device arranged to provide lubricant to the sliding bearings between the rollers and the inner casing surfaces in the holes. This has the advantage that refrigerant and lubricant can be the same liquid.

According to a preferred embodiment of the invention, the housing complies with standard ISO 684.

According to a preferred embodiment of the invention, the housing is made of a cemented carbide and the rollers are made of a slightly softer cemented carbide. The housing can also be made of another hard material, such as a ceramic material or diamond.

Through this arrangement, the rollers will primarily be worn. The rollers are relatively cheap and easy to replace, and thus form a wear part.

In an embodiment of the invention, the rollers may be mounted in the holes, for example with ball bearings or other type of bearing. If the profile rollers are set vertically, such storage may be particularly suitable.

An advantage of the present invention is that wire can be both drawn and rolled in the same drawbar. Another advantage is that the rollers can be easily replaced in the event of wear or when other profile shapes are needed. The housing itself can also be replaced in a wire drawing station from a wire drawing wire housing to a wire drawing housing. Thus, the advantages of draw rolling can be combined arbitrarily with the advantages of conventional draw disc drawing without the disadvantages of the respective method being pronounced. Another important advantage is that tensile rolling can be applied in existing wire drawing devices that have previously been limited to wire drawing with tension sheets. Another advantage is that the problems of wire rolling according to the prior art are avoided. For example, no sensitive calibration of the rollers is required.

Additional features of the invention and advantages thereof will be apparent from the following detailed description of embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be better understood from the detailed description of preferred embodiments of the present invention given hereinafter and the accompanying Figures 1 to 6, which are intended only to illustrate the preferred embodiments and not to be limiting with respect to the present invention.

Figure 1 shows a prior art wire drawing device in a perspective view.

Figure 2 shows in a perspective view a tension roll housing according to a preferred embodiment of the present invention for rolling wire.

Figure 3 shows the draw roller housing in figure 2 in a front view with obscured parts dashed.

Figure 4 shows the draw roller housing in figure 2 in a side view.

Figure 5 shows the draw roller housing in Figure 4 in a cross section along the line A-A with the rollers visible.

Figure 6 shows a wire drawing device according to a preferred embodiment of the present invention comprising 13 blocks, wire drawing stations. Figures 7a and 7b show a draw roller housing in a perspective view according to a further embodiment of the invention in which two substantially orthogonal roller pairs are arranged in the draw roll housing.

Figure 7c shows the draw roller housing in Figures 7a and 7b in a cross section a view from above.

Figure 8 shows the draw roller housing in Figures 7a-c in a cross section in a side view.

PREFERRED EMBODIMENTS In the following description, specific techniques and applications are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments which differ from those set forth herein in detail. In other cases, detailed descriptions of well-known methods and apparatus have been omitted so as not to obscure the description of the present invention with unnecessary details. schematically A 102 The lubricant can be both eg soap powder, Figure 1 shows a wire drawing device according to the prior art. wire 101 is pulled through a lubricant container containing lubricant 103. s.k. dry drawing or some form of oil, so-called wet drawing.

The wire is pulled through a pull plate 104 arranged in a cooling device 105, in the present case, a water cooling tank. Water is pumped into cooling device 105 via inlet 106 and out of the device via outlet 107.

The draw plate 104 has a cone angle between 10 and 25 degrees and consists, according to the prior art, of four parts; entrance cone, traction cone, bearing and exit cone. The input cone improves the possibility of good lubrication of the substance during the deformation. The traction cone is the actual reduction tool. of the disc and forms a smooth transition when the wire leaves the disc.The pulling disc 104 can be removed from the cooling device 105 when the device is not in operation and is replaced.

Figure 2 schematically shows a perspective view of a drawing disc or a housing 201, for rolling a wire, also called drawing roll housing to be distinguished from drawing discs according to the prior art for drawing disc drawing of wire, according to an embodiment of the invention. The draw roller housing 201 has on its appearance the same shape and appearance as the draw plate 104 described in connection with Figure 1 and thus fits in the cooling device 105.

That is, the drawing plate 104 for wire drawing and the drawing roll housing 201 with rollers for rolling are replaceable in the device described in connection with Figure 1.

If the draw roller housing 201 is used in the device of Figure 1, the lubricant will lubricate the plain bearings between the rollers and the housing.

The draw roller housing 201 is cylindrical with a sheath surface 202, front side 203 and a back side 204. A front side 203 has an entrance or an inlet 205 for feeding the wire. In contrast to prior art traction sheaves, the opening of the inlet 205 is larger than the diameter of the incoming tree. Ie. the tension roller housing 201 itself does not process the wire, only the rollers do.

In an outlet (not shown in Figure 2) on the back 204, the rolled wire is pulled out. The housing further has a first hole 206 and a second hole 207 in the radial direction. The holes are radially offset so that an imaginary inner shell surface for each hole substantially coincides with a diameter of the draw roller housing 201. 10 15 20 Q 0 0 0 0 I 0000 0 = .. =.:. §ÉI 3 ..

IC OCOI OO 0 I 0 0 I 0 0 0 526 11 373 Figure 3 shows the draw roll housing 201 in a front view with obscured parts shaded by a first roll 301 and a second roll 302 arranged in the draw roll housing 201. The wire fed into the inlet 205 is rolled of the first roller 301 and the second roller 302, respectively, according to the cooperating profile which is clearly seen in Figure 3. The first roller 301 has an oval profile 303 and the second roller has a round profile 304.

Figure 4 shows the draw roller housing 201 in a side view. The inlet 205 and an outlet 401 are clearly visible here.

Figure 5 shows the draw roller housing 201 in Figure 4 j. A cross section The first roller 301 consists of a first a profile part 502 and a second sliding part 503. along line A-A. sliding part 501, The second roller 302 consists of a first sliding part 504, a profile part 505 and a second sliding part 506.

The first and second sliding parts 501 and 501, respectively, of the first roller 301 and 503 cooperates with the inner jacket surface 507 of the first hole 206 and the first and second sliding surface 506 of the second roller 302, respectively, which also cooperate with the profile part 502 of the second hole 207. inner sheath surface The wire of the first roller to thereby form a pair of rollers which processes the wire to the desired shape and size as it is pulled through the pair of rollers.

According to the invention, the draw roll housing thus only functions as a support for the rollers and does not process the wire. In fact, the wire guides the rollers which thus do not necessarily need to be fixed in the axial direction.

Figure 6 shows a wire drawing machine according to a preferred embodiment of the invention comprising a first wire processing station 601, a second wire processing station 602 and a third wire processing station 603. Wire 604 is fed from a wire feed (not shown). 601 In the first and second wire processing stations, respectively. 602, roll the wire 10 15 20 f \) (II g 0000 II 0 0000 u 0001 I; 0 I QI- Ib QIO: '2.' .Du lila o II IIl q IOOIGI 0 c IO 'IG OO 526 373 12 ä In the first station 601, the wire 604 is rolled into an oval shape. and in the second station 602 the wire 604 is rolled back to a round shape.At the third station the wire can be so small that pulling by means of a traction sheave may be preferable why one can choose a traditional traction sheave in the last station 603.

Figures 7a, 7b and 7c show a draw roller housing 703 in three different views according to a preferred embodiment of the invention in which a further pair of rollers is arranged. Ie. the draw roller housing 703 according to the embodiment shown in Figures 7a and 'H3 comprises two pairs of rollers which are arranged in an orthogonal relationship to each other. An inlet 701 to the draw roll housing 703 is adapted to receive a wire to be rolled which is discharged through an outlet 702. 704. In the draw roll housing 703 holes 705 and 706, respectively, and third and fourth holes 707 and 708, respectively, are arranged in a cooling device. the fourth hole 705, 706, 707 and the figure is clearly visible first and second The first, second, 708 are arranged to receive first, second, third and fourth rollers The first and second holes 705 and 706 are (not shown). oval and radial and offset in two opposite directions so that the respective shell surfaces coincide with a first diameter of the draw roller housing. The third and fourth holes 705 and 706 are also oval and radial and offset in two opposite directions so that the respective shell surfaces coincide with a second diameter of the draw roller housing, where it is the second diameter substantially perpendicular to the first diameter. Thus, it is possible to perform two rolls directly after each other in two perpendicular directions.

Figures 8 show the draw roller housing in the embodiment described in connection with Figure 7 in a cross-sectional view. The same details are denoted by the same reference numerals. A first roll 801 is 10 15 20 IQ cci! I gt uctnii p unooøo II arranged in the first hole 705 and a second roller 802 is arranged in the second hole 706. A third roller 803 is arranged in the third hole 707. Also a fourth roller is of course arranged in the fourth hole 708 but the fourth roller is not visible in this view.

It may be justified to give the traction roller housings such a design that an arrangement with one or more indexing positions can be obtained. This is in view of any tilting problems that have arisen at the position that the oval wire enters the rollers which are to be rolled so that the wire becomes round and thus enables a form of prestressed wire line. This can e.g. performed with male and female grooves on the ends or mantle surfaces of the draw roller housings.

It is obvious that the present invention can be varied in many different ways. For example, more than three wire processing stations may be present in a wire drawing plant, between 3 and 8 stations being common. Such variations should not be construed as a departure from the scope of the present invention. All such modifications as will be apparent to those skilled in the art are intended to be included within the scope of the appended claims.

Claims (3)

1. 0 15 20 25 30 526 373 IH REQUIRED 1. A device for manufacturing wire comprising - a housing which has a passage comprising an inlet for feeding a metal wire with a first diameter and shape and an outlet for discharging said wire after processing. of said diameter and / or shape, characterized in that - said housing comprises at least a first and a second hole arranged to accommodate a first and a second roller, - said first roller is arranged in said first hole and has a first profile - said second roller is arranged in said second hole and has a second profile which may be the same as said first profile or different from said first profile, - said first and second rollers are arranged to roll said metal wire between them so that said metal wire obtains a second diameter and / or shape according to said first and second profile. Device according to claim 1, wherein, - said housing comprises a third and a fourth hole arranged to accommodate a third and a fourth roller, - said third and fourth holes are arranged with respective shafts relative to said first and second holes so that said first and second rollers roll said wire in a first direction and said third and fourth rollers roll said wire between them in a second direction, substantially perpendicular to said first direction. Device according to claim 1 or 2, wherein - said housing has the same shape as a drawing board for wire drawing and is adapted to be mounted in a wire drawing bench. Device according to any one of claims 1, 2 or 3, wherein - said first, second, third and / or fourth roll has an oval, round, V-shaped, square or other optional profile suitable for rolling. . Device according to any one of claims 1, 3-4, wherein - said housing is cylindrical and has a continuous, centrally, axially located passage, - said first hole in said housing is continuous, radial and round and offset in a first direction so that an edge of a mantle surface to said first hole substantially coincides with a diameter of said housing, - said second hole in said housing is continuous, radial and round and offset in a second direction, substantially opposite said first direction so that an edge of a mantle surface to said first hole substantially coincides with said diameter of said housing. Device according to any one of claims 2-4, wherein, - said housing is cylindrical and has a through, centrally, axially located passage, - said first hole in said housing is through, radially and round and offset in a first direction so that a edge of a mantle surface to said first hole substantially coincides with a first diameter of said housing, - said second hole in said housing is continuous, radial and round and offset in a second direction, substantially opposite said first direction so that an edge of a mantle surface to said first hole substantially coincides with said first diameter of said housing, - said third hole in said housing is continuous, radial and round and offset in a third direction so that an edge of a mantle surface of said third hole substantially coincides with a second diameter on said housing where said second diameter is substantially perpendicular to said 10 15 20 25 30 10. 11. 526 373 lb first diameter, - said fourth hole in said housing is g continuous, radial and round and offset to a fourth direction, substantially opposite said second direction so that an edge of a mantle surface to said fourth hole substantially coincides with said second diameter of said housing. Device according to any one of the preceding claims, wherein - the device further comprises a cylindrical roller, which is arranged in said hole, - said cylindrical rollers comprise, in axial direction, a first sliding part, a profile part and a second sliding part, - said first and second sliding parts are arranged to abut and slide against parts of the inner casing surfaces in said hole and said profile parts form between them a profile for rolling said wire. Device according to any one of the preceding claims, wherein - said rollers are arranged in said housing so that said profile parts coincide with said passage, - said profile parts cooperate therewith to form a common profile for rolling said wire. Device according to any one of the preceding claims, comprising a cooling device arranged to cool said housing, and a lubricant device arranged to provide lubricant. Device according to claim 9, wherein - said cooling device comprises a coolant, and - said coolant and lubricant are the same substance. Device according to any one of the preceding claims, wherein said housing and said rollers are made of cemented carbide or other durable hard material. 10 15 20 25 30 526 373 I? An apparatus according to any one of the preceding claims, wherein said housing is made of a first cemented carbide having a first hardness, said rollers being made of a second cemented carbide of a second hardness, said first cemented carbide being harder than said second cemented carbide, so that in primarily said rollers wear. 13. A draw roll housing for the manufacture of wire, said draw roll housing being cylindrical and having a through, central, axial opening, through which a wire of a first dimension and shape is to run, characterized in that - said draw roll housing further comprises a first through, radial and round hole , which is offset in a first direction so that an edge of said first hole substantially coincides with a first diameter of said draw roll housing, said draw roll housing further comprises a second through, radial and round hole, which is offset in a second direction, substantially opposite said first direction so that an edge of said first hole substantially coincides with said first diameter of said draw roller housing. A draw roll housing according to claim 13, wherein - said draw roll housing comprises a third continuous, radial and round hole, which is offset in a third direction so that an edge of said third hole substantially coincides with a second diameter of said draw roll housing, - said draw roll housing comprises a fourth continuous, radial and round hole, which is offset to a fourth direction, substantially opposite said second direction so that an edge of said first hole substantially coincides with said second diameter of said draw roller housing, and said first and second diameters are substantially perpendicular. Roll for rolling a wire in a draw roll housing according to claim 13, characterized in that - said roll comprises, in axial direction, a first sliding part, a profile part and a second sliding part. Wire drawing device comprising - a first wire processing station in which a diameter and / or shape of a wire is machined from a first diameter and / or shape to a second diameter and / or shape, - at least one second wire processing station in which said second diameter and / or shape of said wire wire is processed into a third diameter and / or shape, - means arranged to carry said wire from said first wire processing station to said at least second wire processing station so that different parts of said wire are simultaneously processed in said first and said at least second wire processing stations, characterized in that - at least one of said first and at least second wire drawing station comprises a device according to any one of claims 1 to 15.