JPH01233009A - Equipment for rolling taper rod - Google Patents

Abstract

PURPOSE:To move a blank to its starting position from completing position even if the kaliber of a rolling roll is in a spiral groove shape and to form numerous taper rods by making the interval in the diameter direction of both rolling rolls freely changeably and positioning a rolling blank in the roll axial direction by a guide body. CONSTITUTION:A taper rod 1 is first rolled in a flat sectional shape and is formed in the taper rod 1 by a main device by the rolling of a 2nd stage. In case of forming the taper rod 1 by passing a rolling blank through a kaliber 15 between both rolling rolls 8, 9, the variation in the roll axial directional position of the spiral kaliber 15 accompanied by the rotation of the rolling rolls 8, 9 is moved in the roll axial direction from the rolling start position of the kaliber 15 and faced to the rolling completion position of the kaliber 15. When reaching to the rolling completion position, the interval in the diameter direction of both rolling rolls 8, 9 is changed to the interval that the blank can be moved in the axial direction, made a rolling start position by moving the blank in the roll axial direction by the guide body thereafter and the rolling is continuously executed. Numerous taper rods can thus be formed in succession from a simple blank.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a tapered rod rolling device, which continuously rolls a tapered rod from a single material in which the rolling roll has a spiral groove shape. The aim is to

(Prior Art) Roll-forming of a tapered rod by passing a rolled material between a pair of rolling rolls has been conventionally performed.

In this case, if the hole formed on the outer periphery of the roll is an annular groove, the diameter of the roll must be increased in proportion to the length of the taper rod, which increases the size of the equipment, and A tapered rod with a diameter larger than this cannot actually be rolled.

Therefore, as disclosed in JP-A-49-102552, by providing spiral grooves on the outer periphery of the roll, it is possible to roll and form a long tapered rod regardless of the diameter of the roll. It is said that

(Problem to be Solved by the Invention) When the grooves on the outer periphery of the rolling roll are formed into a spiral groove shape, as the rolling roll rotates, the material moves in the axial direction of the center roll corresponding to the position of the spiral groove. Therefore, the length that can be rolled is limited by the length in the axial direction of the roll, and it is not possible to continuously produce a large number of tapered rods from a single raw material, which requires the effort of sequentially feeding multiple raw materials, resulting in a problem of poor production efficiency.

The present invention aims to solve the above problems.

(Means for Solving the Problems) The present invention is characterized by a pair of rolling rolls 8, 9.
In the rolling device, a groove 15 is provided in a spiral groove shape on the outer periphery of each rolling roll 8, 9, and a tapered rod is formed by rolling by passing a rolled material through the groove 15 between both rolling rolls 8, 9. , a guide body 17 for positioning the rolling material is provided on the inlet side of the rolling roll 8.9, and this guide body 1
7 is movable in the axial direction of the rolling rolls 8 and 9, and the radial interval between the rolling rolls 8 and 9 is changeable so that the rolled material can move in the axial direction between the rolling rolls 8 and 9. It is in the point where it is.

(Function) When forming the Taber rod 1 by passing the rolled material through the groove 15 between the two rolling rolls 8.9, the position of the spiral groove groove 15 in the roll axis direction changes with the rotation of the rolling roll 8.9. The rolled material also moves in the roll axis direction from the rolling start position of the groove 15 toward the rolling end position of the groove 15. When the rolling end position is reached, the radial interval between both rolling rolls 8.9 is changed to an interval that allows the material to move in the axial direction, and then the material is moved in the axial direction by the guide body 17 and rolling begins. position. Then, the rolling rolls 8 and 9 are again
The radial interval of is changed to the interval at which rolling is performed, and rolling is performed continuously.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 9 shows a tapered rod 1 that is rolled and formed by a rolling machine according to an embodiment of the present invention, and shows a reduced diameter tapered portion 2 that gradually becomes smaller in diameter from the front in the rolling direction (right side in the figure) to the rear.
It has a minimum diameter portion 3 having a constant diameter, a diameter-enlarging tapered portion 4 whose diameter gradually increases from the front to the rear in the rolling direction, and unprocessed portions 5 before and after the tapered portion 4. This taper rod 1 is continuously formed from a bar material by two-stage rolling.
It is rolled into a shape with a flat cross section, and then formed into a tapered rod 1 using the apparatus of the embodiment in the second stage of rolling. In addition,
The diameter dimension of the flat cross section in the first stage rolling is assumed to gradually change in the rolling direction in accordance with the diameter of the taper rod 1.

FIG. 6 shows a rolling mill 6 for performing second-stage rolling, in which a pair of upper and lower rolling rolls 8.9 are supported on a frame 7 via chocks 10.11 so as to be movable up and down. Each rolling roll 8, 9 is rotationally driven by a motor (not shown).

In addition, each chock 10.11 is connected to a hydraulic cylinder 1, respectively.
2.13, and a hydraulic cylinder 14 is also interposed between both chocks 10 and 1.1. Then, both rolling rolls 8
．． The radial spacing of 9 is changeable.

As shown in FIG. 7, a groove 15 is provided in the shape of a spiral groove on the outer periphery of each rolling roll 8.9. As shown in FIG. 8, the hole molds 15 are designated by symbols A, B, and
The spaces between C, D, D', and ^゛ correspond to the symbols in the drawing for the taper rod 1 in Fig. 9, and B, C, D, D', and A'.
The diameter size corresponds to the diameter between the two. Further, a guide groove 16 is spirally provided on the outer periphery of the lower rolling roll 9 with the same inclination as the groove 15.

A guide body 17 shown in FIGS. 1 to 5 is attached to the rolling mill frame 7. As shown in FIGS.

This guide body 17 is attached to the rolling mill frame 7 via a bracket 18. That is, the base 20 is provided on the bracket 18 so as to be movable in the rolling roll axial direction via a pair of sliders 19 and 19 arranged in parallel in the rolling direction. A rotary table 21 is attached to the upper surface of the base 20 via a support shaft 22 so as to be freely rotatable about a vertical axis. The rotary table 21 is fixed to the base 2 through a long hole 23 on the circumference centered on the support shaft 22.
This is done through bolts and nuts (not shown) that are inserted between the rotary table 21 and the rotary table 21.

A pair of dog-legged arms 24, 24 are attached to the upper surface of the rotary table 21 so as to be able to swing freely about the vertical axis 25, respectively, and are parallel to each other in the roll axis direction. A clamping piece 26, 26 made of rolled material is attached to be swingable about a vertical shaft 27. On each clamping piece 26, 26, clamping rollers 28 arranged in parallel in the front and rear in the rolling direction are rotatably attached to the vertical axis. Also,
One end of a link rod 29, 29 is attached to the rear end of each arm 24, 24 in the rolling direction so as to be able to swing around a vertical axis, and the other ends of both link rods 29, 29 are It is rotatably attached to the telescopic rod 32 of the cylinder 31. The hydraulic cylinder 31 is fixed to the upper surface of the rotary table 21, and the arm 2
4.24 is swung, and the interval between both the clamping pieces 26.26 is expanded or contracted.

Further, a guide roller 34 is rotatably attached to the upper surface of the rotary table 21 via a bracket 33 in parallel with the rolling roll axis.

As shown in FIG. 2, a follower 35 is attached to the front end of the base 20 in the rolling direction. This follower 3
Reference numeral 5 conveys the guide body 17 in the axial direction of the roll via a ball caster 36 that engages with the guide groove 16 on the outer periphery of the roll. The ball caster 36 has a rolling ball 38 attached to a housing 37 via a spring (not shown) so as to be elastically movable back and forth in the rolling direction. 37 is attached to the swing piece 39.

The swing piece 39 is swingably attached to a protrusion 42 of a mounting piece 40 extending downward from the front end of the base 20 via a pivot 42 in the roll axis direction. Further, an air cylinder 43 is attached to the mounting piece 40, and its telescopic rod 44 is pivotally connected to the swinging piece 39 through an elongated hole 45. Due to the expansion and contraction, the swinging piece 39 swings, and the ball 38 is inserted into and removed from the guide groove 16. The air cylinder 43 is activated by turning the limit switch 46 ON-OFF.

That is, as shown in FIGS. 2 and 5, a mounting plate 47 is provided extending downward from the front end surface of the bracket 18 in the rolling direction, and a limit switch 46 is mounted on this mounting plate 47. Also, a pair of support pieces 48a, 48 are attached from the mounting plate 47.
b protrudes, and a guide bar 49 is supported at both ends by these support pieces 48a and 48b in parallel to the roll axis direction. A guide piece 50 extends downward from the base 20. The guide piece 50 is fitted into the guide bar 49 so as to be movable in the roll axis direction, and also moves toward and away from the switch piece 51 of the limit switch 46 as the base moves. Further, a compression coil spring 52 is wound around the guide bar 49 between the guide piece 50 and one support piece 48b, and biases the guide body 17 toward the rolling start position via the guide piece 50.

Although not shown, there is a rotation angle detection device for each rolling roll 8°9, a device for measuring the radial width of the rolled material on the inlet side of the rolling rolls 8 and 9, and a rotation angle measured by these devices. Based on the width dimension signal, the drive motors for the rolling rolls 8, 9 and the hydraulic cylinders 12, 13 .
It is equipped with a control device for controlling 14.

Next, the operation of the above configuration will be explained with reference to FIG.

The material rolled into a flat cross section in the first stage is moved to the guide body 17
It is held between the holding pieces 26, 26 by a holding roller 28, and is prevented from escaping upward by a guide roller 34. Note that the rotation angle of the guide body 17 around the support shaft 22 corresponds to the helical inclination of the hole mold 15.

Further, by detecting the rotation angle of the rolling rolls 8 and 9, the position of the spiral groove-shaped hole 15 in the roll axis direction corresponding to the rotation angle is controlled. That is, the symbol A position in FIGS. 7 and 8 is the rolling start position, and first, the groove 1 is placed at this position.
The rotation of the rolling rolls 8.9 is controlled so that the rolling rolls 8 and 9 are positioned at the positions shown in FIG.

Further, the rolled material is rolled in the first stage rolling so that the width dimension thereof gradually changes in the longitudinal direction in accordance with the desired taper rod dimension. Therefore, by measuring the width of the material at the entrance of the rolling rolls 8 and 9, the longitudinal position of the material can be tracked. As a result, at the start of rolling, the material position corresponding to the position A in FIG.
The A position of the hole mold 15 is made to correspond.

Thereafter, rolling is performed by passing the material through the groove 15 between rotating rolling rolls 8.9. That is, between A and B in FIGS. 7 to 9, a reduced diameter tapered portion 2 is formed, between B and C, a minimum diameter portion 3, and between CD and C, an enlarged diameter tapered portion 4 is formed. During this roll forming, the rotation angles of the rolls 8 and 9 are detected and the longitudinal position of the material is tracked, and the speed of the rolls 8 and 9 is controlled so that the material and the position of the groove 15 correspond correctly. is performed by the control device.

During rolling, the pole caster 3 of the follower 35
6 fits into the spiral guide groove 16 on the outer periphery of the pressure roll 9, the follower 35 moves in the roll axis direction as the rolling roll 9 rotates, and the guide member 17 to which the follower 35 is attached moves. also moves in the direction of the roll axis. Since the helical states of the guide groove 16 and the groove 15 match, the movement of the groove 15 in the roll axis direction due to roll rotation corresponds to the axial movement of the guide body 17, and the rolled material and the groove 15 correspond to each other.
There is no deviation in the roll axial position with respect to No. 5, and there is no problem of poor rolling due to biting.

Next, the rolling rolls 8 and 9 rotate from the A position to the D position to complete rolling forming of one tapered rod 1, and the rolling rolls 8 and 9 further rotate to rotate from the D position to the D' position. At the position, a signal is sent from the rotation angle detection device to the hydraulic cylinders 12, 13, 14 of the rolling mill 6, and both rolling rolls 8
, 9 in the radial direction in the separating direction to change the roll gap. The gap S1 before this change is a size suitable for rolling,
The gap S2 after the change has a size that does not interfere with the movement of the rolled material in the roll axis direction therebetween.

Further, due to the movement of the guide body 17 in the roll axis direction, the guide piece 50 is moved to the switch piece 51 of the rimming switch 46.
When it comes into contact with it, it is in the ON position. Then, the roll gap becomes S,
After changing from to S2, the telescopic rod 44 of the air cylinder 43 is extended, and the pole caster 36 is pulled out of the guide groove 16 by the swinging of the swinging piece 39. Then, due to the elastic force of the spring 52 compressed by the guide piece 50 that moves in the roll axis direction during rolling, the guide body 1
7 is pushed in the direction of the roll axis and returns to the rolling start position.

The guide piece 50 also returns to the rolling start position together with the guide body 17, separating from the switch piece 51, and in response to the signal, the round caster 36 is inserted into the guide groove 16 again.
By actuation of the hydraulic cylinders 12, 13, 14 of the rolling mill 6, the gap between the rolling rolls 8, 9 is again changed from S2 to S. As a result, the rolling roll 8°9
The position is between the A position and the he' position. Thereafter, the rolling rolls 8.9 are rotated, and the rolled material is brought to position A, which is the rolling start position, again. At this time, the rotation angle of the rolling rolls 8.9 is corrected based on the width measurement of the material so that the longitudinal position of the material is accurately at the rolling start position. By performing the rolling again after an appropriate time, the tapered rod 1 can be continuously rolled and formed from a single raw material.

Note that the follower 35 is the pole caster 36 in the above embodiment.
Although the cam 53 is inserted into the guide groove 16, as shown in FIG. In FIG. 11, the same parts as in the above embodiment are indicated by the same reference numerals.

Further, the movement of the guide body 17 is not limited to the one using the follower body 35 and the spring 52, but a means for driving the guide body 17 in the roll axis direction is provided separately, and the movement of the guide body 17 is controlled by the measurement signal of the rotation angle of the rolling rolls 8 and 9. The driving means may be controlled to move the guide body 17 so that the positions of the rolling material and the groove 15 correspond to each other.

(Effects of the Invention) According to the present invention, the radial interval between both rolling rolls can be changed freely, and the rolling material can be positioned in the axial direction of the rolls by the guide body, so even if the rolling roll has a spiral groove shape. ,
By moving the raw material from the rolling end position to the rolling start position of the groove, a large number of tapered rods can be continuously formed from a single raw material, and production efficiency can be improved.

[Brief explanation of the drawing]

The drawings relate to embodiments of the present invention; FIG. 1 is a plan view of the guide mechanism, FIG. 2 is a sectional view of the same side, and FIG. 4 is a partial plan view of the guide mechanism, FIG. 5 is a sectional view taken along line A-A in FIG. 2, FIG. 6 is a side view of the rolling mill, and FIG. 8 is a front view of the rolling roll, FIG. 8 is a sectional view of the rolling roll, FIG. 9 is a side view of the tapered rod, FIG. 10 is a flowchart of the rolling process of the tapered rod, and FIG. 11 is a follower according to a different embodiment. FIG. 1... Taber rod, 8.9... Rolling roll, 15
...Hole type, 17...Guide body.

Claims (1)

[Claims] (1) A pair of rolling rolls 8 and 9 are provided, each rolling roll 8
, 9 is provided with a groove 15 in the form of a spiral groove, and a rolling material is passed through the groove 15 between both rolling rolls 8 and 9 to form a tapered rod by rolling. On the entrance side, a guide body 1 for positioning the rolled material
7 is provided, and this guide body 17 is connected to rolling rolls 8 and 9.
The taper rod is movable in the axial direction, and the radial interval between the rolling rolls 8 and 9 is changeable so that the rolled material can move in the axial direction between the rolling rolls 8 and 9. rolling equipment.