KR830000353B1 - Continuous extrusion equipment - Google Patents

Abstract

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Description

Continuous extrusion equipment

FIG. 1 is a schematic illustration showing in cross section a geometrical arrangement consisting of an inner rotary member taking a toroid or disc shaped member and an outer rotating member taking a toroidal shape, with both rotating members having an outer circumferential surface and an outer member of the inner member. The inner circumferential surface of the inner surface is configured to form a joining surface, and the inner member has an axis that intersects each other at an angle such that the part is covered by the outer circumference and not part.

FIG. 2 is made up of the inner member and the outer member as in the arrangement of FIG. 1, but the geometry is that the annular groove is located on the inner circumferential surface of the outer member and is partially covered by the outer circumferential surface of the inner member and partially uncovered. Schematic illustration showing the layout in cross section.

Figure 3 has an outer member of the inner member in the geometric arrangement of the shape shown in Figure 1, according to the present invention for continuously deforming the long workpiece of infinite length to produce an elongated product of infinite length Top view of the device.

The present invention relates to an apparatus for deforming a workpiece, and more particularly, to an apparatus for continuously extruding an endless length of a long workpiece, such as a rod, in order to make an elongated product of infinite length such as an electric wire.

Hydrostatic continuous extrusion techniques are known in the field of deforming infinitely long workpieces to produce infinitely long thin articles. For example, US Pat. Nos. 3,740,985 and 3,985,011 disclose two embodiments of an apparatus and associated method for hydrostatic continuous extrusion of elongated articles of infinite length. The first exemplified patent was reissued as reissued patent number 29,795. These embodiments provide suitable shear-transmitling media to increase pressure drift through the die that transforms the workpiece into a thin, long product and to sufficiently increase the ductility of the workpiece by forcing the workpiece. Through this, the moving train of the gripping element sector to apply the force to the workpiece of infinite length was embodied.

It is also known to extrude an elongated product by using a single rotating member with a groove on the radial outermost surface and advancing the workpiece along a curved path through the die. Such techniques are disclosed in US Pat. Nos. 3,765,216 and 3,872,703.

Both of these patents use fastening members to restrain the workpiece and hold the workpiece in the groove of the rotating member. This impedes the workpiece with frictional resistance due to contact with the surface of the holding member, which impedes the progress of the workpiece towards the die, which is an obvious impediment to efficiency in the extrusion process. There is also no effect of continuously increasing the extrusion force during hydrostatic extrusion of the workpiece.

Techniques attempted to solve the frictional resistance problem associated with the extrusion process are disclosed in US Pat. No. 3,911,705. It uses a flexible band between the stationary member and the workpiece, which allows the band to travel with the rotating member and the workpiece, with lubricant on the surface of the band in contact with the stationary member to minimize friction on the workpiece. have. Such devices, however, do not contain lubricant around the groove in the rotating member which may cause contamination or road slippage, and to prevent the extruded metal from overflowing the band around the band at high pressure. There is no suitable countermeasure to effectively seal it. In addition, the use of relatively thin flexible wire bands to maintain tension places a limit on the maximum extrusion force the device can withstand.

There are two other processes open to the public. One is disclosed in U.S. Patent No. 3,922,898, and the other is '' Extrolling Combining Extrusion, '' published on page 73 of the ″ Wire Journal ″, issued July 1975. and Rolling, ”published in Betzalel Avitzur's article. Both publications disclose two circular block or roll installations installed on parallel axes, the radial outermost surfaces of which cooperate to define an area between them for gripping a long workpiece. Simultaneous rotation of the rolls causes the long workpiece to run tangentially and extrude through a properly positioned die. The article also describes the ridges on the radial outer circumferential surface of one roll and engaging grooves on the radial outer circumferential surface of another roll to form a workpiece gripping area. In these general types of devices, the contact length between the steelwork and the circular block or the rollerger is relatively limited, with the result that the maximum pressure output that can be given to the workpiece in progress is similarly limited.

Continuous hydrostatic extrusion techniques for infinite lengths of long workpieces to produce infinitely long thin products are disclosed in Korean Patent Application No. 77-556. Such technology employs a second rotor which is installed to rotate on a different axis from the rotational axis of the first rotor of the first rotor having an annular groove on the radially extending surface, The radially extending surface of the second rotor covers only a part of the annular groove of the first rotor. Since these two rotors are rotated together in the same direction of rotation, an elongated workpiece advantageously clad with a hydrostatic medium is injected into the open portion of the annular groove, which is carried through the covered portion of the annular groove to form a thin long product. By passing through the extrusion die is discharged from the covered portion of the annular groove. In order to support the elongated workpiece and the pressure change in its coating which increases as the elongated workpiece proceeds toward the extrusion die in the covered portion of the annular groove, the second rotor is well inclined toward the extrusion die position and is preferably installed.

The present invention provides an improved apparatus that overcomes these drawbacks in the prior art.

According to the present invention, a long and thin product of infinite length is produced by injecting a long workpiece into a first portion of an annular groove in one of two joining surfaces formed by the outer peripheral surface of the inner rotating member and the inner peripheral surface of the outer rotating member. It is thought to continuously deform the infinitely long workpieces. The inner rotating member may be in the form of a toroid or disc-shaped member, and the outer rotating member may be in the form of a toroid. The inner and outer rotating members intersect at such an angle that the second part of the annular groove is covered by the joining surface without the annular groove, while the first part of the annular groove is not covered by the joining surface without the annular groove. Each has its own axis. By simultaneously rotating the inner member and the outer member in the appropriate direction of rotation on each axis, the elongated workpiece proceeds from the first part of the annular groove to the second part and into the deforming device when approaching the second part. Preferably, the deformation device, which is an extrusion die, transforms a long workpiece coated with hydrostatic media into an elongated product of infinite length.

Referring to FIG. 1, there is shown an external rotating member 12 in the form of a toroid of the internal rotating member 11 in the form of a toroidal or disc shaped member. The inner member 911 is fitted into the outer member 12 such that the outer circumferential surface 913 and the inner circumferential surface 14 of the outer member 12 form engaging surfaces. The outer circumferential surface 13 and the inner circumferential surface 14 are arranged to be movable relative to each other when the inner member 11 and the outer member 12 are rotated. The annular groove 15 extends around the outer circumference of the inner member 11. The fixed axis 16 of the inner member 11 and the fixed axis 17 of the outer member 12 have the first portion 18 of the annular groove 15 covered by the inner peripheral surface 14 of the outer member 12. While the second portion 19 of the annular groove 15 is covered by the inner circumferential surface 14 of the outer member 12 at an angle α, for example, in the inner member 11 having an outer diameter of 30.48 cm. 3 °, crossed. This relationship will not change when the two members 11, 12 rotate on their respective axes 16, 17.

Referring to FIG. 2, there is shown an inner rotary member 21 in the form of a toroidal or disc shaped member and an outer rotary member 22 in the form of a toroid. The inner member 21 and the outer member 22 are similar to the inner member 11 and the outer member 12 shown in FIG. 1, respectively. Accordingly, the inner member 21 forms an engaging surface on which the outer circumferential surface 23 and the inner circumferential surface 24 of the outer member 22 can move relative to each other when both members 21 and 22 are rotated. ) Is fitted. The apparatus of FIG. 2 differs from that of FIG. 1, the difference being that the annular groove 25 extends around the inner circumference of the outer member 22 and not the outer circumference of the inner member 21. Accordingly, here, too, the angle α is present at the intersection angle of the respective fixed axes 26 and 27 of the inner and outer members 21 and 22, so that the first portion 28 of the annular groove 25 is the inner member 21. Although not covered by the outer circumferential surface 23, the second portion 29 of the annular groove 25 is covered by the outer circumferential surface 23 of the inner member 21. This relationship will likewise not change when the two members 21, 22 rotate on their respective axes 26, 27.

Referring to FIG. 3, the device 30 may be heated or not heated, for example to produce an infinite length of elongated workpiece (P, e.g. one or more metal wires). The device 30 is adapted to continuously deform a metal rod in an unloaded state, and the device 30 has an inner rotating member 31 in the form of a toroid or a disk and an outer rotating member 32 in the form of a toroid (this is shown in FIG. 3). Both members are the same as the inner member 11 and the outer member 12 shown in the apparatus of FIG. 1. However, as will be explained in more detail below. It may be replaced by the same geometry as seen in the arrangement of FIG.

The inner member 31 is formed in the outer member 32 such that the outer circumferential surface 33 and the inner circumferential surface 34 of the outer member 32 form engaging surfaces that can move relative to each other when both members 31 and 32 are rotated. Is fitted. The annular groove 35 extends around the outer circumference of the inner member 31. Both members 31 and 32 are provided so that the fixed axis 36 of the inner member 31 and the fixed axis 37 of the outer member 32 intersect at each α as described in more detail below. have. Accordingly, the first portion 38 of the annular groove 35 is not covered by the inner circumferential surface 34 of the outer member 32, and the second portion 39 of the annular groove 35 is formed of the outer member 32. It is covered by the inner circumferential surface 34. This relationship will also not change when both members 31 and 32 rotate on respective axes 36 and 37.

The axis 36 of the inner member 31 is fixed in line with the center line of the shaft 41 on which the inner member 31 is installed. The shaft 41 is rotatable in two bearings 42 and is driven by a belt 43 that engages a pulley 44 installed on the shaft 41. The plate 45 is screwed to one end of the shaft 41 and serves to hold the inner member 31 in the outer member 32. The axis 37 of the outer member 32 is fixed in line with the axis of the bowl bearing 46, which surrounds the outer member 32 and the outer member 32 is driven, for example driven. By the frictional force generated between the outer surface 33 of the inner member 31 and the coupling surface consisting of the inner peripheral surface 34 of the driven outer member 32, it is possible to rotate about the axis 37. In other words, the outer member 32 may be driven, or both the inner member 31 and the outer member 32 may be driven. The die stem 47 is covered with the second portion of the annular groove 35 on the outer circumferential surface 33 of the inner member 31 from a position adjacent to the exposed first portion 38 of the annular groove 35. (39) At least part of it extends into.

The operation of the apparatus 30 of FIG. 3 is described as follows. When the inner member 31 and the outer member 32 are simultaneously rotating in the direction of the arrow 49 on the respective axes 36 and 37 by the rotation of the drive pulley 44 and the shaft 41, a long workpiece ( W is fed into the exposed first portion 38 of the annular groove 35 in the inner member 31. Preferably, the elongated workpiece W coated with a suitable hydrostatic medium, for example wax, is formed from the first portion 38 of the annular groove 35 below the die axis 47. Proceeding into the covered second portion 39, the long workpiece W again approaches the first portion 38 of the annular groove 35 and proceeds into the die 48. The elongated workpiece W is discharged through the die shaft 47 as an elongate product P through one or more suitable holes in the die 48.

On the other hand, when the arrangement of FIG. 2 is used in the apparatus 30 of FIG. 3 instead of the arrangement of FIG. 1, the long workpiece W is provided through an annular groove in the outer member among the coupling members similar to both members 21 and 22. FIG. The elongated product P may be produced continuously by passing through and ejecting it through a suitable extrusion die.

The apparatus described above will be a simple illustration of the preferred embodiments of the present invention. Of course, various modifications may be made in accordance with the principles of the invention.

Claims (1)

In the continuous extrusion apparatus of a long workpiece, wherein the inner rotating member having an outer circumferential surface and the outer rotating member having an inner circumferential surface are supported with respect to each other to form a partial engagement of the inner circumferential surface and the outer circumferential surface, the surfaces 13, 23, 33; One of the 24, 34 ones 13, 24, 33 comprises an annular groove 15, 25, 35 having first and second portions 18, 28, 38; 19, 29, 39, The extrusion die 48 is located in the second part 39, and the axis of rotation 16, 26, 36; 17, 27, 37 of the inner and outer rotating members 11, 21, 31; 12, 22, 32. Is the annular groove (15, 25, 35) of the first portion (18, 28, 38) is not covered by the surface (14, 23, 34) of the other member (12, 21, 32) The second portions 19, 29, 39 of the grooves are covered by the surfaces 14, 23, 34 of the other members 12, 21, 32 and also the inner and outer rotating members 11, 21, 31; 12. , 22, 32 are rotated simultaneously on the respective axes 16, 26, 36; 17, 27, 37 to drive the workpiece W from the first portion 18, 28, 38 to the second portion of the annular groove. Continuous extrusion apparatus, characterized in that for injection and continuously by each such intersection α which to proceed into the extrusion die (48) into (19,29,39).

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