JPH04147702A - Rolling device for wire - Google Patents

Abstract

PURPOSE:To simplify the device by bringing back up rolls into pressurized contact with groove rolls to transmit driving power and offsetting the centers of the groove rolls in the delivery direction of a wire from the centers of the back up rolls. CONSTITUTION:The wire 35 is inserted between the plural groove rolls 25 having grooves 34 and the groove rolls 25 are driven to roll the wire 35. The groove rolls 25 are, thereupon, constituted as driven rolls. The back up rolls 13 are brought into pressurized contact with the groove rolls 25 to transmit the driving force. The centers of the groove rolls 25 are offset in the direction where the wire 35 is delivered from the centers of the back up rolls 13 in the rolling direction of the wire 35. The time for preparatory plane for the purpose of exchanging the rolls is drastically shortened in this way.

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD The present invention relates to an apparatus for rolling wire rods made of metal, plastic, ceramic, etc., and particularly includes a plurality of grooved rolls having grooves on the outer circumferential surface of the grooved rolls. The present invention relates to a wire rod rolling apparatus that inserts a wire rod into a space formed by aligning the grooves of a plurality of grooved rolls and rolls the wire rod by driving the plurality of grooved rolls. Summary of the Invention: A rolling device comprising grooved rolls assembled from multiple directions and their outer peripheral surfaces abutted against each other, comprising a driving backup roll and a grooved roll, and the driving force is applied by the backup rolls. Pressure is transmitted to the grooved rolls, and the centers of the two types of rolls are offset from each other in the rolling direction of the wire according to the rotational direction of these rolls, so that the center of the grooved rolls is on the rolling direction side with respect to the center of the backup roll. This makes it possible to simplify the device and significantly shorten setup time. ``Prior Art'' Conventionally, fixed die wire drawability and groove roll rolling methods have been used as methods for reducing the diameter of metal wires, that is, for thin wire processing. This method involves inserting a metal wire through a hole in the center and forcibly pulling it to stretch it.In contrast, in the groove roll rolling method, the outer peripheral surfaces of multiple groove rolls are butted against each other, and the space formed by the grooves is stretched. A metal wire is passed through the wire, and a groove roll is driven to roll the wire and reduce its diameter.A special new material with high heat resistance and rust resistance has been developed as the material for the wire. For this reason, the groove roll rolling method, which is a rolling friction processing, has become more superior to the fixed die method, which is a sliding friction processing.In particular, it has a high area reduction rate due to slowing of work hardening. This is due to the fact that it is possible to obtain the following characteristics, and requires less machining energy, saving labor and facilitating high-speed machining.A conventional rolling device consisting of such grooved rolls has, for example, three full rolls, as shown in Fig. 6. The outer peripheral surfaces of the rolls 1 are brought into contact with each other, a circular space is formed by the outer peripheral surfaces 112 of these rolls 1, and the three rolls 1 are inserted while the metal wire 3 is inserted into this space. Rolling is performed by driving by a drive unit 4 and gears 5.The apparatus shown in FIG. 1. Problems to be Solved by the Invention According to the apparatus shown in FIG. 6, a gear 5 is attached to each groove roll 1, and a gear 5 is attached to the upper groove roll 1. Further, a drive unit 4 is connected.Therefore, this type of device has the disadvantage that it requires complicated setup and time when replacing the rolls 1.In the device shown in FIG. drive unit 4
Since they are connected, they have similar drawbacks. In general, in order to perform high-speed torque machining in this type of apparatus, a structure with appropriate strength is required, and for this reason, the diameter of the roll 1 becomes larger than necessary. However, it has been numerically proven that even when performing the same amount of work, the energy is reduced when a roll with a smaller diameter is used. In addition, groove roll 1 generated during high-speed machining
The wear of the contact surface with the workpiece increases in proportion to the hardness of the workpiece, and the grooved roll 1 must be replaced quite frequently in order to maintain constant product dimensions. Reducing the replacement time like this will lead to a significant increase in the operating rate. Generally, in a normal processing machine, the grooved roll 1 is replaced once every 200 hours, and the replacement time for the entire machine can exceed 10 hours. Furthermore, considering changes in processing dimensions, this results in a huge loss of time. As described above, the conventional apparatus not only has a complicated structure, but also has the disadvantage that it takes a lot of setup time, including replacing the rolls when changing the processing dimensions, and the film formation is delayed. The present invention has been made in view of these problems, and an object of the present invention is to provide a wire rod rolling device that significantly shortens setup time and simplifies the structure of the device. It is something.

[Means for Solving the Problems 1] The present invention comprises a plurality of grooved rolls having grooves on their outer circumferential surfaces, and the outer circumferential surfaces of the plurality of grooved rolls are brought into contact with each other so that the grooves of the plurality of grooved rolls are aligned with each other. In an apparatus for rolling a wire by passing a wire through a space formed by alignment and driving the plurality of groove rolls, the groove roll is a driven roll, and a backup roll is crimped to the groove roll. In addition, the center of the groove roll is offset in the direction of feeding out the wire with respect to the center of the backup roll in the rolling direction of the wire. Note that the above offset amount depends on the material of the groove roll and backup roll (especially the contact friction coefficient and Young's modulus of these rolls) and the material of the wire rod that is the material to be rolled (
Generally speaking, it is preferably 1 to 10%, more preferably 3 to 5%, of the diameter of the backup roll, although it varies depending on the diameter of the backup roll (in particular, deformation resistance). In addition, quantitatively speaking in accordance with the examples described later, the offset amount is preferably 1 to ion, and more preferably 3 to 5n. [Operation] Therefore, when the backup roll is driven by a drive means such as a drive unit, the rotation of the backup roll is transmitted to the grooved roll that is pressed against the backup roll. Moreover, since the grooved roll is offset from the backup roll in the direction in which the wire is sent out, the rotational driving force for the grooved roll by the backup roll is transmitted by two types of torque generated by the friction of the roll contact surface and the elastic flatness of the grooved roll. , the groove roll is drawn toward the center of the backup roll to reduce the offset. For this purpose, sufficient pressure is automatically applied to the wire rod inserted into the groove of the grooved roll, so that the wire rod is effectively rolled to reduce its diameter or thickness. Become.

【Example】

FIG. 3 shows the overall configuration of a metal wire rolling device according to an embodiment of the present invention, and this rolling device includes a frame 1
It is equipped with 0. On this frame 10, three bases 11 are arranged upright in parallel to each other and spaced apart from each other by a predetermined distance. A rolling unit 12 is mounted on each of these bases 11, and these units 12 roll the metal wire in three stages to gradually reduce its diameter. Units 12 provided on each base 11
is equipped with three backup rolls 13 as shown in FIG. These backup rolls 13 are housed in three openings 15 radially formed in a frame 14 having an inverted Y shape. Movable blocks 16 are mounted within the opening 15 so as to be movable in the radial direction, and the backup roller 13 is rotatably supported by these movable blocks 16 via bearings 17 . The backup roll 13 is connected to the output end of a speed reducer 19 via a drive shaft 18. This speed reducer 19 is designed to reduce the output of the motor 20. In order to press the movable block 16 that rotatably supports the backup roll 13, a wedge 23 is disposed between the opening 15 of the frame 14 and the movable block 16, as shown in FIG. The amount of penetration of this wedge 23 is adjusted by an adjustment bolt 24. The backup force adjustment mechanism consisting of these wedges 23 has three backup rolls 1 as shown in FIG.
3 are provided in the same way. Three grooved rolls 25 are arranged in the center of the frame 14 in correspondence with the respective backup rolls 13. These three groove rolls 25 are rotatably supported by three brackets 26 via bins 27, as shown in FIG. These three brackets 26 are rotatably attached via pins 28 to three arms 30 provided on the sleeve 29 at approximately equal angles. A male thread 31 is formed on the outer peripheral surface of the sleeve 29.
This male thread 31 is screwed into a female thread formed on the inner peripheral surface of the hole of the adjustment handle 32. Therefore, by rotating this handle 32, the sleeve 29 is moved in the axial direction via the male screw 31,
The three groove rolls 25 are simultaneously offset from the three backup rolls 13, and the amount of offset is adjusted by a handle 32. In the above configuration, when the three motors 20 of the rolling unit 12 on each base 11 are driven to rotate, the rotation of these motors 20 is reduced by the speed reducer 19 and transmitted to the backup roll 13. Therefore, the backup roll 13 rotates at a predetermined rotational speed. Backup roll 13 is wedge 23
Since the grooved roll 25 is pressed against the grooved roll 25 by the backup force adjusted by the grooved roll 25, the grooved roll 25 is rotationally driven. Then, the metal wire 35 inserted through the space formed by the groove 34 formed on the outer peripheral surface of the grooved roll 25 is rolled as shown in FIG. 5, and is pulled out through the center hole of the sleeve 29. That will happen. 1 and 2 show the principle of operation of each rolling unit of such a rolling apparatus, in which the backup roll 13 is directly connected to a drive device consisting of a speed reducer 19 and a motor 20, and the groove roll 25 and metal wire 3
5 is rolled, and the groove roll 25 is constituted by a driven work roll. The rotation of the driven groove roll 25 is transmitted by the backup roller 13 using friction torque accompanied by elastic flattening. Further, the pressure P applied to the metal wire 35 is automatically applied from the backup roll 13 to the groove roll 25 as a component of the contact force F generated by changing the position of the offset roll. Then, it is transmitted to the metal wire 35. The feature compared to a conventional rolling device using grooved rolls is that the grooved roll 25 that contacts the metal wire 35 is composed of a driven roll, which simplifies the structure and also reduces the diameter of the roll 25 itself. be able to. Therefore, the time required to replace the roll 25 can be reduced to one-tenth or less compared to the conventional method. In addition, by reducing the diameter of the roll 25, the energy required for machining can be reduced by 10~
It becomes possible to reduce it by 20%. In addition, the groove roll 25
Since the roll itself has a small diameter and is simple, and torsional torque for transmitting driving force does not act on the shaft, it becomes possible to change the material to ultra-hard ceramic rolls instead of conventional alloy steel. . This makes it possible to reduce the wear of the grooved rolls 25 and to reduce the minimum working diameter for plastic working. Effects of the Invention 1 As described above, the present invention uses a grooved roll as a driven roll, and a backup roll is crimped to the grooved roll to transmit driving force. The center of the grooved roll is offset in the direction in which the wire is fed out. Therefore, there is no need to connect the grooved rolls to a drive source, which makes it possible to significantly shorten the setup time for replacing the rolls, and to simplify the apparatus.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the principal parts of a metal wire rolling device according to an embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is an external perspective view showing the overall configuration of the device. , FIG. 4 is a front view of the rolling unit, FIG. 5 is a longitudinal sectional view of the same essential part, FIG. 6 is a front view of a conventional rolling device, and FIG. 7 is a front view of another conventional rolling device. In addition, in the symbols used in the drawings, 13...Backup roll 14...Frame 15...Opening 16...Movable block 19...Reducer 20...φ motor 23...Wedge 24... Adjustment bolt 25...Groove roll 26◆...Bracket 29...Sleeve 31...Male thread 32...Adjustment handle 34...Groove 35...Metal wire.

Claims (1)

[Claims] 1. A space formed by comprising a plurality of grooved rolls having grooves on their outer peripheral surfaces, and aligning the grooves of the plurality of grooved rolls with each other by butting the outer peripheral surfaces of the plurality of grooved rolls. In the apparatus for rolling the wire by inserting the wire and driving the plurality of grooved rolls, the grooved roll is a driven roll, and a backup roll is crimped to the grooved roll to transmit driving force. At the same time, a wire rod rolling apparatus characterized in that the center of the grooved roll is offset in the direction of feeding out the wire with respect to the center of the backup roll in the rolling direction of the wire rod.