JPH0444256Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a roller die device for elongating a wire rod.

(Prior Art) Figures 5 to 7 show the structure of a conventional roller die device, which consists of two or three rollers 1 each having a special hole shape, that is, an oval hole shape or a round hole shape. A shaft 3 that rotatably supports each roller 1 is supported by the housing 2 via a bearing 4 or a bearing 4 and a chock 5 at both ends thereof.

(Problems to be solved by the invention) In the conventional roller die device as described above,
In either case, each roller has a structure in which the shaft portion is supported at both ends, and therefore the diameter of the roller must necessarily be larger than the diameter of the shaft that supports it. Particularly when processing thin drawn wire rods with a diameter of 3 mm or less, if the distance between adjacent roller dies in the drawing direction is large and the rollers have a large diameter, the wire rod will fall. In order to prevent this, it is effective to reduce the diameter of the roller, but if the roller is made smaller, the shaft diameter and bearing diameter will also become smaller, resulting in problems such as reduced strength and lifespan. . In addition, in the apparatus shown in FIG. 6, the bearing portion is not sealed, making it unsuitable for wet wire drawing or the use of powder lubricants other than bearing lubricants.

The present invention was developed to solve the above-mentioned problems, and the roller diameter is made as small as possible to increase the advantages in terms of pulling force and separation force.
It satisfies the basic conditions required for this type of roller die device, which is to increase the shaft diameter as much as possible to increase the advantage in terms of strength and life, and to also reduce the distance between adjacent roller dies in the drawing direction. The purpose is to provide a device that can.

(Means for Solving the Problems) The roller die device according to the present invention has three roller bodies having a cantilevered shaft structure in which a shaft portion and a roller formed at one end thereof are integrally formed, and are separated by 120 degrees. The rollers are placed close to each other to form a desired hole shape, and the shaft portion of each roller body is rotatably supported via a bearing in an eccentric hole of a roll chock built into the housing. The gist is that the outer ends of each roll chock are connected by a rotation interlocking mechanism for adjusting the proximity gap between the rollers.

(Function) The roller die device according to the present invention has three roller bodies each having a cantilevered shaft structure in which a shaft portion and a roller formed at one end are integrally arranged at 120 degree intervals. While bringing the rollers close together to form the required hole shape, the shaft of each roller body is
The roll chock is rotatably supported via a bearing in the eccentric hole of the roll chock built into the housing, and the outer end of each roll chock is connected by a rotation interlocking mechanism for adjusting the proximity gap between the rollers. The rollers provide excellent pulling and separation force, and the large-diameter shaft is supported by similarly large-diameter bearings to maintain rigidity and strength.In addition, the roll chocks that seal and hold each roller body The required amount of rotation is transmitted at the same time,
By this operation, the proximity gap between the rollers can be finely adjusted.

(Example) The present invention will be explained below based on the example shown in FIGS. 1 to 4.

In the figure, 6 is a roller body, which is composed of a small-diameter roller 7 formed at one end and a large-diameter two-stage shaft portion 8 that is integrated with the small-diameter roller 7, and this roller body 6 consists of three rollers. The rollers 7 are arranged as a set with an interval of 120 degrees, and the respective rollers 7 are brought close to each other to form a hole shape, thereby forming one die.
The shaft portion 8 is inserted into and supported by an eccentric hole 11 of a roll chock 10 via a bearing 9.

By the way, the roll chock 10 is rotatably fitted precisely into a hole 13 formed in the housing 12, and a worm wheel 14 is provided at the outer end of the roll chock 10 to mesh with a worm of a rotation interlocking mechanism for adjusting the proximity gap of the rollers, which will be described later. Furthermore, a chock lid 15 is screwed into the outer end opening, making the bearing portion completely sealed.

Reference numeral 16 denotes a pull bolt that passes through a support frame 17 attached to the outside of the housing 12 and whose tip is screwed into the screw hole of the chock lid 15. Numeral 18 indicates a pull bolt that passes through the support frame 17 and whose tip is screwed into the screw hole of the chock lid 15. By appropriately adjusting both bolts 16 and 18, the position of the roll chock 10 is determined and held fixed.

Reference numeral 19 denotes a rotational interlocking mechanism for adjusting the proximity gap of the rollers 7, which mechanically connects the worm wheel 14 provided at the outer end of the roll chock 10, and allows each roll chock 10 to rotate in synchronization by rotating at one location. , finely adjusting the roller body 6 by changing the circumferential position of the eccentric hole 11,
This is to appropriately determine the proximity gap between the rollers 7.

By the way, the rotation interlocking mechanism 19 in the embodiment shown in FIGS.
A worm shaft 21 provided with a worm 20 that meshes with a worm wheel 14, and a rotating shaft 21a corresponding to the worm shaft 21 are supported in the housing 12 via bearings, and the ends of each worm shaft 21 are connected by a bevel gear 22. An operation handle 23 is provided at one end of one worm shaft 21 via a bevel gear 22, and by rotating the operation handle 23 in forward and reverse directions, all roller jocks 10 are rotated in conjunction with the rotation interlocking mechanism 19. The rollers 7 are rotated synchronously with the same amount of rotation to determine the gap between adjacent rollers 7.

In addition, in FIG. 3, the worm shaft 21 is connected to the bevel gear 2.
Fig. 4 shows a structure in which the bevel gear 22 and the rotating shaft 21a are connected by a universal joint 24 instead of the bevel gear 22 and the rotating shaft 21a.
Instead, a structure is shown in which each worm shaft 21 is connected with a flexible wire 25, which can be selected arbitrarily. Furthermore, the rotation interlocking mechanism 1
The rotation amount of the roll chock 9 is determined by the eccentricity of the roll chock 10, the proximity gap amount of the roller 7, the rotation angle of the roll chock 10, the reduction ratio, etc.

It is of course possible to install an electric, hydraulic, or pneumatic drive device in parallel to the manual rotation operation using the handle as in this embodiment, and to transmit these rotations via a speed reduction mechanism. .

In addition, in the embodiment shown in FIG. 1 and FIG.
60 sets of roller dies in one housing 12
The diagram shows the arrangement with the phase changed.
In this case, if one set of the holes formed by the rollers 7 is a so-called ombre-shaped hole shape in which each side is curved in a triangular shape, the other set is a round hole shape. Use multiple sets of dice arranged in tandem.

Furthermore, roller dies with different hole shapes (for example,
A triangular hole type, a square hole type, a round hole type) can be individually assembled into the housing 12, and a plurality of sets can be arranged in tandem by alternately combining them.

(Effects of the invention) As explained above, the roller die device according to the invention has three roller bodies each having a cantilevered shaft structure in which the shaft part and the roller formed at one end are integrally arranged at 120 degree intervals. The rollers are placed close to each other to form the desired hole shape, and
The shaft of each roller body is rotatably supported via a bearing in an eccentric hole of a roll chock built into the housing, and the outer end of each roll chock is connected by a rotation interlocking mechanism for adjusting the proximity gap between the rollers. Excellent pulling force and separation force can be obtained by using rollers that are close to each other.Moreover, when multiple roller dies are arranged in tandem with 60 degrees of displacement from each other and used in blocks, the distance between the rollers between the roller dies can be reduced. Since it is small, the phenomenon of falling of the wire to be drawn can be completely prevented. Furthermore, since the shaft diameter and bearing diameter can be increased, it is advantageous in terms of strength and life. Furthermore, since the bearing part has a sealed structure, the pull-out lubrication method can be applied to both dry and wet methods. Furthermore, since each roll chock is connected by a series of rotation interlocking mechanisms for roller proximity gap adjustment, each roll chock can be simultaneously rotated in synchrony, thereby making it possible to reliably finely adjust the roller gap.

[Brief explanation of the drawing]

Fig. 1 is a front view in longitudinal cross section of one embodiment of the present invention, Fig. 2 is a side view, and Figs. 3 and 4 show other embodiments of the rotation interlocking mechanism for adjusting the roller proximity gap. The partial front view, FIG. 5, FIG. 6, and FIG. 7 are partially cutaway front views of a conventional roller die device. 6 is a roller body, 7 is a roller, 8 is a shaft portion, 9 is a bearing, 10 is a roll chock, 11 is an eccentric hole, 12 is a housing, 14 is a worm wheel,
19 is a rotation interlocking mechanism for adjusting the proximity gap between rollers.

Claims (1)

[Scope of utility model registration request] Three roller bodies with a shaft cantilever structure in which a shaft and a roller formed at one end are integrated are arranged at 120 degree intervals, and the respective rollers are brought close to each other to form the required hole shape. In addition, the shaft portion of each roller main body is rotatably supported via a bearing in an eccentric hole of a roll chock built into the housing, and the outer end of each roll chock is connected by a rotation interlocking mechanism for adjusting the proximity gap of the rollers. A roller die device characterized by: