JPH0242570B2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a straightening device for drawn round bars.

<Prior art> Conventionally, continuous drawing machines have been used to draw round bars cold-drawn from coil-shaped metallic materials.
Polished round bars are manufactured by cutting to the desired length and performing linear polishing. In this continuous drawing machine, the internal stress caused by the wire drawing process is removed from the cut round bar that has passed through the linear polisher. However, although there are differences depending on the material processing conditions, large ones will have a thickness of about 0.1 mm. That is, since the cut round rods are successively introduced into the linear polishing machine, a difference in the degree of straightening occurs between the tip and rear end portions and the center portion of the cut round rod. This also affects the removal of internal stress,
There is a difference in the degree of thickness between the central part, where the internal stress has been sufficiently removed, and the end parts, where the internal stress remains, resulting in a difference in wire diameter.

Therefore, even if the accuracy of the cutting length is improved and both ends are cut to a usable error, re-cutting must be performed to obtain a cut round bar within the specified wire diameter range, which requires additional man-hours and There is a lot of wasted material.

For this reason, the present applicant has previously proposed
A straightening device for a drawn round bar having a structure as disclosed in No. 46322 (Japanese Patent Application No. 167115/1982) was provided.

As shown in FIG. 5, a rotary cylinder 50 is provided along the feed axis A of the drawn round bar B, and a rotation drive device 51 for rotating the rotary cylinder 50 is provided.
Inside the rotary cylinder 50, there are a plurality of grooved correction bodies 5 that project with respect to the feed axis A of the drawn round bar B to give a zigzag-like deflection to the drawn round bar B.
2, and an adjusting means 53 for adjusting the amount of protrusion of the correcting body 52 is provided between the correcting body 52 and the rotary cylinder 50.
is provided. This adjustment means 53 includes a correction body pushing bolt 55 screwed onto a cross member 54 fixed across the main body of the rotary cylinder 50, and a correction body lifting bolt 56 passed through the correction body 52 and through the cross member 54. The amount of protrusion of the correction body 52 can be adjusted by rotating both bolts 55 and 56.

<Problems to be Solved by the Invention> In the above-mentioned prior art, it was possible to eliminate the internal stress caused by the drawing process and eliminate the change in the wire diameter of the drawn round bar that occurs during the forced polishing process after cutting. However, although the thickness of the drawn round bar is determined by a die, the finished dimension tolerance is required in microns, so it was necessary to change the amount of protrusion of the correction body in order to adjust it. In this case, since the adjusting means has the above-mentioned configuration, it is necessary to stop the operation once, adjust the bolt to change the amount of protrusion, and then restart the operation.
Improvements in operating efficiency were desired.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a straightening device for a drawn round bar, which can adjust the amount of protrusion of a straightening body without stopping operation and improve operational efficiency.

<Means for solving the problems> The means for solving the problems according to the present invention are shown in FIGS.
As shown in the figure, a rotating body 1 disposed along the feed axis A of the drawn round bar B, a rotation drive device 2 that rotates the rotating body 1 around the feeding axis A, and a feed axis of the drawn round bar B. A plurality of round nozzle-shaped correction cylinders 3 protrude with respect to A, and the correction cylinders 3 are rotatably supported around an axis inclined with respect to the feed axis A, and are movable laterally to the rotating body 1. An internal correction tube support 4 and an adjustment device 5 for adjusting the amount of protrusion of the correction tube 3 are provided, and the adjustment device 5 is rotatable integrally with the rotary body 1 and movable in the direction of the feed axis A. an adjusting cylinder 6 fitted onto the outside, a moving device 7 for moving the adjusting cylinder 6 in the direction of the feed axis A during rotation of the rotating body 1, and a movement device 7 for moving the adjusting cylinder 6 in the direction of the feed axis A during the rotation of the rotating body 1; It consists of a coupling device 8 for converting the movement of the cylinder support 4 in the lateral direction.

<Function> In the above problem solving means, the rotary drive device 2
When the rotating body 1 is rotated, the drawn round rod B is given a zigzag-like deflection by the inner surface of the straightening cylinder 3, and internal stress is removed.

During this operation, when the motor 30 of the moving device 7 is driven, the moving body 33 moves in the direction of the feed axis A,
The adjustment tube 6 moves. Then, the diagonal groove 26 of the correction cylinder support 4 and its engagement piece 40 are connected via the connecting rod 28.
As a result, the direction of movement is changed sideways, that is, in a direction perpendicular to the direction of the feed axis A, and the straightening tube support 4 moves laterally, the amount of protrusion of the straightening tube 3 changes, and the degree of thickening of the drawn round bar B changes. can be adjusted.

In addition, the straightening tube 3 is rotatably provided on the straightening tube support 4 and is inclined with respect to the feed axis A, so that the straightening tube 3 rolls on the surface of the round bar B as the drawn round bar B advances. , do not hinder its progress. Therefore, the amount of protrusion of the correction body can be adjusted without stopping the operation, and operation efficiency can be improved.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. Fig. 1 is a cross-sectional view showing the structure of the straightening device for drawn round bars of the present invention, Fig. 2 is a cross-sectional view in the direction of the feed axis showing the inner part of the rectifying cylinder of the repelling rotor, and Fig. 3a is the same during operation. FIG. 3b is a sectional view taken in the direction perpendicular to the feed axis, FIG. 3c is a partially cutaway bottom view, and FIG. 4a is a sectional view taken during operation. FIG. 4b is a cross-sectional view in the direction of the feed axis showing the straightening cylinder without adjustment, and FIG. 4B is a cross-sectional view in the direction perpendicular to the feed axis.

As shown in the figure, the straightening device for a drawn round bar according to the present invention is disposed between a drawing device and a cutting device, and has a cylindrical shape arranged along the feed axis A of the drawn round bar B. A rotating body 1 of
A rotary drive device 2 that rotationally drives the rotating body 1 around the feed axis A, a plurality of round nozzle-shaped correction tubes 3 that protrude with respect to the feed axis A of the drawn round bar B, and the correction tubes 3. Inclined to the feed axis A (approximately
20°) and a straightening barrel support 4 which is rotatably supported around an axis and is movable in the lateral direction (direction perpendicular to the feed axis) inside the rotating body 1, and the straightening barrel 3.
An adjustment device 5 for adjusting the amount of protrusion is provided.

The adjustment device 5 includes an adjustment cylinder 6 fitted externally that can rotate integrally with the rotation 1 and move in the direction of the feed axis A, and an adjustment cylinder 6 that moves the adjustment cylinder 6 in the direction of the feed axis A while the rotary body 1 is rotating. and a coupling device 8 for converting movement of the feed axis A of the adjustment cylinder 6 into lateral movement of the correction cylinder support 4.

The rotating body 1 includes a correction cylinder inner part 9 formed to have a rectangular cross section, a connecting device support part 10 formed to have a larger diameter than the inner part 9 to support the connecting device 8, and the adjusting cylinder inner part 9. 6 is externally fitted to the adjusting cylinder outer fitting part 11 which has a diameter smaller than that of the support part 10 and has a circular cross section;
A belt attachment part 13 formed with a V groove for attaching the belt 12, and a bearing 1 formed with a circular cross section.
It consists of an end 15 which is rotatably supported by the frame F via a frame F and serves as an outlet for the drawn round bar, and an end 16 that also serves as an inlet for the drawn round bar. A through hole is provided along the feed axis A, which is the rotation axis of each of the above-mentioned parts, and the drawn round rod B is passed through the through hole.

The rotational drive device 2 is a DC motor, and through a V-belt 12 attached to its output shaft,
A rotational motion is given to the rotating body 1.

The straightening tube 3 is formed in the shape of a round nozzle, the inlet side 17 is formed with a larger diameter than the outlet side 18, and is supported by the straightening tube support 4 via a bearing 19, as shown in FIG. As shown, five correction cylinder inner parts 9 of the rotating body 1 are provided with adjacent ones having opposite inclinations to each other.

The center one 4a of the straightening cylinder support 4 can be adjusted during operation, and the other four pieces 4b are formed so as not to be adjusted during operation. can be adjusted using the correction tube 3a which can be adjusted during operation.

As shown in FIG. 4, the correction tube support 4b, which is not adjusted during operation, is smaller in the left-right direction than the inner surface of the rotating body 11, forming a gap 20.
It moves in the left-right direction along guide rails 21 provided at the top and bottom, respectively. Then, it is fixed at any position within the movable range by a fixing bolt 22 that passes through the rotating body 1 and reaches the side surface of the correction tube support 4. Further, the center of the correction tube support hole 23 is formed so as not to coincide with the rotation axis of the rotating body 1.

In addition, the correction barrel support 4a can be adjusted during operation.
Similarly, as shown in FIG. 3, it is smaller in the left-right direction than the inner surface of the rotating body 1, forming a gap 24, and moves in the left-right direction along guide rails 25 provided at the top and bottom, respectively. Diagonal grooves 6 are formed on the upper and lower sides, respectively, and form part of the connecting device 8 of the adjusting device 5.

The adjustment cylinder 6 of the adjustment device 5 is formed with a circular cross section and is fitted onto the adjustment cylinder external fitting part 11 of the rotary body 1, and the end 27 of the adjustment cylinder 6 on the correction cylinder side is connected to the rotary body 1. It is formed to have the same diameter as the coupling device support part 10 of
The connecting rod 28 of the connecting device 8 is fixed.

The moving device 7 of the adjustment device 5 includes a drive gear 31 rotatably supported by the frame F and rotated by an external motor 30 via a chain 29, and a drive gear 31 rotatably supported with respect to the frame F. It consists of an adjustment shaft 32 and a moving body 33 connected to the adjustment cylinder 6 via a bearing 35 screwed onto the adjustment shaft 32. Then, the amount of movement is measured by the measuring device 34A. That is, the measuring device 34A includes a gear 34 externally fitted on the same axis as the drive gear 31 so as to be able to rotate together with the gear 34,
and a vernier 39 that indicates the amount of rotation of the gear 34 on the main scale 39a of the frame F via gears 36, 37, and 38 that rotate as the gear 34 rotates. Note that the adjustment shaft 32 of the drive gear 31 is parallel to the rotation axis of the rotary body 1.

The connecting device 8 of the adjusting device 5 includes a connecting rod 28 that transmits movement of the adjusting cylinder 6 in the direction of the feed axis A, and a connecting rod 28 that is fixed to the connecting rod 28 and engages with the oblique groove 26 of the correction cylinder support 4a in plan view. It consists of a parallelogram-shaped engaging piece 40, which is fixed to the connecting rod 28 with a nut 28a. The engagement piece 40 and the oblique groove 26 allow the feed axis A of the connecting rod 28 to
The movement in this direction is converted into movement of the correction barrel support 4 in the lateral direction (direction perpendicular to the direction of the feed axis A).
41 is a bearing of the connecting rod 8.

In the above configuration, the drawn round bar B that has been linearly cold drawn from a coiled material through a die is then transferred to a rotating body 1 equipped with a straightening tube 3.
removes internal stress. Next, the drawn round bar B is fed and cut by a cutting device, enters a linear polishing device, polishes the circular surface of the cut round bar, and is sent to a product stand.

In this work, first, the fixing bolt 22 is adjusted according to the thickness of the drawn round rod B, and the amount of protrusion of the correction tube 3 is adjusted and fixed.

Then, the rotation drive device 2 is driven to rotate the rotating body 1. Then, the end 16 which becomes the rotating body entrance
As shown in FIG. 2, the drawn round rod B inserted from the straightening tube 3 is given a zigzag-like deflection by the inner surface of the straightening tube 3, and internal stress is removed.

During this operation, when the motor 30 of the moving device 7 is driven, the drive gear 31 connected via the chain 29 rotates, the adjustment shaft 32 arranged on the same axis rotates, and the moving body 33 moves along the feed axis A. move in the direction
The adjustment tube 6 moves. Then, the diagonal groove 26 of the correction cylinder support 4 and its engagement piece 40 are connected via the connecting rod 28.
As a result, the direction of movement is changed to a sideways direction, that is, a direction perpendicular to the direction of the feed axis A, and the correction barrel support 4 is moved laterally. Then, since the center of the straightening cylinder support hole 23 is formed so as not to coincide with the rotation axis of the rotating body 1, the amount of protrusion of the straightening cylinder 3 changes, and the degree of thickening of the drawn round bar B can be adjusted. .

Moreover, this change also occurs from the drive gear 31 at the same time.
Vernier 3 via gears 34, 36, 37, 38
9 and can be visually observed.

Here, since the movable body 33 is connected to the adjustment tube 6 via the bearing 35, the amount of protrusion of the correction tube 3 can be changed while the adjustment tube 6 is rotating, that is, while the rotating body 1 is rotating.

In addition, the straightening tube 3 is rotatably provided on the straightening tube support 4 and inclined with respect to the feed axis A, and rolls on the surface of the round bar B as the drawn round bar B advances. Don't hinder its progress.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

For example, although five straightening barrels are provided, any number of straightening barrels may be provided, such as three or more, and not only the central straightening barrel support may be adjustable during operation, but other ones may also be adjustable.

Furthermore, in the above embodiment, the engagement piece is attached to the connecting rod.
Although the oblique grooves are provided on the support body, the oblique grooves may be provided on the connecting rod side and the engagement pieces may be provided on the support body side.

<Effects of the Invention> As is clear from the above description, according to the present invention, the plurality of round nozzle-shaped straightening cylinders are provided so as to protrude from the feed axis of the drawn round bar, so that the drawn round bar has a zigzag pattern. Since a bend of the shape is given, the internal stress can be removed and the change in wire diameter of the drawn round bar that occurs during the forced polishing process after cutting can be eliminated.

Further, an adjusting device is provided for adjusting the amount of protrusion of the straightening tube with respect to the feed axis by moving the straightening tube support along the guide rail without stopping the straightening operation of the drawn round bar, and the adjusting device is configured to adjust the amount of protrusion of the straightening tube with respect to the feed axis. At least a pair of connecting rods supported on the outer periphery of the rotating body so as to be movable in the direction of the feed axis and arranged on both sides of the feed axis, and the movement of the connecting rods in the direction of the feed axis in a direction perpendicular thereto a diagonal groove formed on one of the connecting rod and the support, an engagement piece fixed to the other of the connecting rod and the support and engaged with the diagonal groove, and the frame. and a moving device that moves the supported connecting rod in the direction of the feed axis, and a moving device that moves the supported connecting rod in the direction of the feed axis. This is done using a moving connecting rod.

Therefore, the degree of thickness of the drawn round bar can be adjusted without stopping its operation, and the operating efficiency can be improved. In addition, the moving device for moving the connecting rod can be installed on the frame side located on the extension of the feed axis of the rotating body, so compared to the case where the moving device is installed on the rotating body, the rotation drive device The load on the vehicle can be reduced, and the structure of the power supply unit required when an electric motor is used as the moving device can also be simplified.

Furthermore, since the connecting rods are arranged symmetrically about the feed axis, there is an excellent effect that no abnormal vibration occurs during rotation and no load is placed on the rotary drive device.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the structure of the straightening device for drawn round bars according to the present invention, Fig. 2 is a cross-sectional view in the direction of the feed axis showing the inner part of the straightening cylinder of the rotating body, and Fig. 3a
3B is a sectional view taken in the direction perpendicular to the feed axis, FIG. 3C is a partially cutaway bottom view, and FIG. 4B is a sectional view taken in the direction of the feed axis, and FIG. 5A is a sectional view taken along the feed axis of a conventional straightening device. ivy cross section,
FIG. 5b is a sectional view taken in a direction perpendicular to the feed axis. 1: rotating body, 2: rotational drive device, 3: correction tube,
4: correction tube support body, 5: adjustment device, 6: adjustment tube,
7: Moving device, 8: Connecting device, 26: Diagonal groove, 2
8: Connecting rod, 29: Chain, 31: Drive gear,
32: Adjustment axis, 33: Moving body, 39: Vernier,
40: Engagement piece, A: Feed axis line, B: Drawn round bar, F: Frame.

Claims (1)

[Scope of Claims] 1. A rotating body 1 supported by a frame F so as to be rotatable about a feed axis A of a drawn round bar B, and a rotation drive device 2 for rotating the rotating body 1 around a feed axis A. , a plurality of round nozzle-shaped correction cylinders 3 whose inner walls protrude with respect to the feed axis A of the drawn round bar B, and the correction cylinders 3 are supported rotatably around an axis inclined with respect to the feed axis A. a correction tube support 4; a guide rail 2 fixed to the rotating body 1 and guiding the movement of the support 4 in a direction perpendicular to the feed axis A;
5, and an adjustment device 5 that adjusts the amount of protrusion of the inner wall of the correction tube 3 with respect to the feed axis A by moving the support body 4 along the guide rail 25, and the adjustment device 5 is provided with the following: At least one pair of connecting rods 28 are supported on the outer periphery of the feed axis so as to be movable in the direction of the feed axis, and are disposed on both sides of the feed axis, and the movement of the connecting rods 28 in the direction of the feed axis is controlled in a direction orthogonal thereto. A diagonal groove 26 formed on one of the connecting rod 28 and the support 4, and an engagement fixed to the other of the connecting rod 28 and the support 4 that engages with the diagonal groove 26. A straightening device for a drawn round bar, comprising a joint piece 40 and a moving device 7 supported by the frame F and moving the connecting rod 28 in the feed axis direction.