JPH0386323A - Adjusting device for forming roll - Google Patents

Abstract

PURPOSE:To arbitrarily adjust the distance between rolls by providing a pair of thread parts with the different direction at both end parts of a spindle of which an adjusting shaft is passed through a hollow interior freely rotable, providing a transmission mechanism of which a relay shaft is linked on one side and a screw piece is linked on the other side and providing a manual handle on the adjusting shaft. CONSTITUTION:The adjusting shaft 7 is driven and the relay shaft 6 and the screw piece 10 are screwing moved forwards and backwards in the opposite direction when roll holders 3a are made to be slidable by releasing a position holding means 4a and the handle 12 is revolved. Both roll holders 3a are made to follow up through the transmission mechanism 11a and a sectional forming roll 5a is approached or separated. After the distance of the sectional forming roll 5a is adjusted, the position of both the roll holders 3a, that is, the position of the sectional forming roll 5a is constrained by working again the position holding means 4a. The sectional forming rolls after adjusting are supplied with rotary force from a driving means and this rotary force is transmitted from the universal joint 16 of the driving means to the spindle through the relay shaft and is transmitted from both roll holders to the sectional forming rolls. By this way, the distance between the rolls can be arbitrarily adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a forming roll adjusting device in a welded steel pipe manufacturing line.

``Problems to be solved by the prior art and the invention'' A roll forming device for a welded steel pipe production line that continuously processes steel strips is equipped with an upper roll and a lower roll as forming rolls, and the strip is passed between the rolls. Although it is bent into a so-called flower,
Why not replace the forming roll every time the pipe size is changed?
In recent years, the split roll method has become mainstream because it requires a large number of rolls with different dimensions, is not easy to replace, and is expensive.

This split roll system consists of split rolls that divide the forming roll into left and right halves, and the pipe size can be changed by adjusting the mutual spacing. Examples of the means include one having a spiral adjustment mechanism as shown in Japanese Patent Application Laid-open No. 57-28627, and one that replaces the spacer between divided rolls as shown in Japanese Patent Application Laid-Open No. 57-209722.

However, in the former adjustment means, the horizontal main shaft itself is entirely a screw, and a pair of nuts are screwed onto the screw,
By screwing the nut, the pair of split rolls that are movably fitted onto the main shaft are moved in the axial direction, and the distance between the split rolls is adjusted. When a load is applied, there is a high risk that the main shaft will break due to stress concentration at the neck. Furthermore, since there is no buff-crush adjustment mechanism, it is unsuitable for manufacturing thin plate pipes, which particularly requires high precision.

In addition, the latter adjustment means interposes a spacer between the pair of left and right split rolls, and in order to replace the spacer with one of the desired size as necessary, the main shaft is removed from the device and the spacer is replaced each time the spacer is replaced. It is necessary to change the dimensions, reassemble it, and incorporate it into the device, which requires a considerable amount of time and effort.

The present invention aims to solve these conventional problems and also aims to stabilize the quality of the product.

``Means for Solving the Problems'' The present invention provides a structure in which, on the outer periphery of the intermediate portion of a hollow main shaft supported on both sides,
A pair of left and right cylindrical roll holders are fitted so as to be slidable in the axial direction, and a position holding means is provided to stop them at an arbitrary position, and both roll holders have a pair of left and right split forming rolls at their inner ends. Each is fixed, and a hollow relay shaft that mechanically connects the main shaft to the driving means is connected to one end of the main shaft so that it can move forward and backward.Furthermore, the main shaft is equipped with an adjustment shaft that passes through the hollow inside so that it can rotate freely. The adjustment shaft is provided with a pair of threaded portions extending in the threaded direction at both ends thereof, and the relay shaft is attached to one threaded portion, and the screw element is attached to the other threaded portion so that the adjustment shaft can be freely screwed in and out. A transmission #R side is provided between the relay shaft and the one roll holder and between the screw and the other roll holder to transmit the screw advance and retreat, and a manual rotation handle is provided at an appropriate position on the adjustment shaft. It is characterized by having the following.

``Operation'' With the above configuration, if the position holding means is released to allow the roll holder to slide, and the handle is rotated clockwise or counterclockwise, the adjustment shaft will follow this,
The relay shaft and the screw screw advance and retreat in opposite directions, and both roll holders follow this via the transmission mechanism, so that the split forming rolls approach or separate.

After adjusting the interval between the split forming rolls in this manner, the position holding means is activated again to restrain the positions of both roll holders and therefore the position of the split forming rolls.

After adjustment, rotational force is supplied from the driving means to the divided forming rolls, and this rotational force is transmitted from the universal jig of the driving means to the main shaft via the relay shaft, and then from both roll holders to the divided forming rolls. transmitted to.

Embodiment The drawing shows an embodiment of the invention for a lower roll.

In the figure, 1 is a hollow main shaft supported on stands 2a and 2b on both sides, and 3a and 3b are a pair of left and right cylindrical roll holders fitted to the outer periphery of the middle part of the main shaft so as to be slidable in the axial direction. , 4a, 4b are position holding means provided on the roll holder for stopping at arbitrary positions; 5a, 5b are a pair of left and right split forming rolls (
(lower roll), 6 is a relay shaft connected to one end of the main shaft so that the main shaft can be moved forward and backward to mechanically connect the main shaft to a drive means (not shown), and 7 is a rotatably penetrating equipment in the hollow interior of the main shaft. The adjustment shafts 8a and 8b are a pair of threaded screws with different threading directions provided at both ends of the adjustment shaft, and 9 is a screw on one side of the adjustment shaft that is installed inside the relay shaft in order to screw the relay shaft forward and backward. Part 8
The screw mechanism 10 is screwed into the screw part 8b of the adjustment shaft, and the screws lla and ll are screwed into the other screw part 8b of the adjustment shaft so that they can be screwed forward and backward.
12 is a transmission mechanism interposed between the relay shaft and one roll holder and between the screw and the other roll holder in order to transmit the screw movement between the relay shaft and the screw to the roll holder; , a manual rotation handle fixed to the other end of the adjustment shaft.

The main shaft l has an axial keyway 13.13 at one end;
The relay shaft 6 has a key 14, 14 slidably engaged with the keyway at its rear end, and a connecting end 15 connected to a universal joint 16 of the drive mechanism at its tip.

Position holding means 4a, 4 provided on roll holders 3a, 3b
b is an oil compression diameter mechanism that reduces the diameter of the inner circumference, and annular hydraulic chambers 41a and 41b are provided inside the circumferential wall very close to the inner circumferential surface of the roll holders 3a and 3b along the inner circumferential surface. It is configured to supply hydraulic pressure, and by the hydraulic pressure, the thin-walled constricted portion 42a42b forming the inner wall of the hydraulic chamber bulges toward the main shaft 1 so as to fit around the main shaft 1.

Further, the roll holders 3a and 3b have a flap 7 at the inner end.
31a and 31b are provided, and annular split forming rolls 5a and 5b are screwed to the flanges.

A screw mechanism 9 built into the relay shaft 6 connects a screw member 17 screwed to one threaded portion 8a of the adjustment shaft 7 to a bearing 18.
The screw member 17 is fitted into the relay shaft 6 rotatably and immovably in the axial direction, and a rotation prevention mechanism 19 is attached to the screw member 17 .

The anti-rotation mechanism 19 includes guide rods 20, 20 protruding outward from the screw member 17, a guide plate 21 through which the guide rods can be moved freely, and the guide plate is connected to the hollow adjustment shaft 7. A support arm 23 is fixed to one end of an empty support shaft 22 inserted through the support arm 23, and the other end of the support shaft protrudes laterally from the stand 2b.
This allows the screw member 17 to move forward and backward, and thus the relay shaft 6 to move forward and backward.

In addition, it is preferable to use precision screws such as pole screws for screwing the screw portions 8a and 8b of the adjustment shaft 7 together.

One transmission mechanism mechanism a that transmits the screw advance and retreat of the relay shaft 6 to one roll holder 3a includes rotary joint mechanisms 1a and 24 on the outer periphery of the outer end of the one roll holder 3a and the outer periphery of the intermediate part of the relay shaft 6, respectively. , the roll holder and the relay shaft can be rotated through the bearing mechanisms 2a and 25, and are fitted in an immovable relationship in the direction of the parts, and two loft mechanisms 3a are provided on both sleeves of one stand 2a, A mechanism 3a is slidably installed in parallel with the main shaft 1, and has one end mechanically connected to the rotary joint mechanism 1a of the roll holder, and the other end mechanically connected to the rotary joint 24 of the relay shaft.

The transmission mechanism b that transmits the screw advance and retreat of the screw 0 to the other roll holder 3b has a rotary joint mechanism 1b on the outer periphery of the outer end of the other roll holder 3b, and transmits the rotation of the roll holder via the bearing mechanism 2b. The bars 26 protruding to both sides are fitted and fixed on the outer periphery of the screw 10, and two bars 26 are fitted on both sleeves of the other stand 2b. The opening 7 door mechanism 3b and the mechanism 3b are slidably penetrated in parallel with the main shaft (1), and one end is mechanically connected to the rotary joint mechanism 1b of the roll holder, and the other end is mechanically connected to the bar 2b.

In addition, the rotary joint mechanisms 1a and 1llb attached to both the roll holders 3a and 3b have a hydraulic chamber 41 of the oil compression diameter mechanism.
There are song selections 43a and 43b that go through songs a and 41b,
A hydraulic hose (not shown) is connected to the song selection.

Further, the stand 2b is equipped with a digital gauge 27 that displays the amount of movement of the divided forming rolls.

Since it has the above configuration, the split forming roll 5a.

5b, position holding means 4a.

4b, that is, cut off the hydraulic pressure supplied to the wave pressure N diameter mechanism, and rotate the handle 12 clockwise or counterclockwise while looking at the digital gauge 27.
and the screw IO are screwed forward and backward in mutually opposite directions, and this screwing forward and backward movement is transmitted to the roll holder 3 via the transmission mechanisms a and llb.
a, 3b, the split forming rolls 5a, 5b approach or separate.

After adjusting in this way, the position holding means 4a, 4b
Hydraulic pressure is supplied to the hydraulic chambers 41a and 41b of the barrel oil compression diameter mechanism, and the thin-walled diameter-reduced portions 42a and 42b are reduced in diameter by the hydraulic pressure, and their positions relative to the main shaft 1 are restrained.

Further, the rotational force from the drive means is transmitted from the universal joint 16 to the main shaft l through the relay shaft 6, and further,
Split forming rolls 5a, 5b from roll holders 3a, 3b
transmitted to.

"Effect of the invention" According to the present invention, the following effects are achieved.

(2) With the above-mentioned configuration, not only can the main shaft or the divided large rolls be driven without any trouble, but also the interval between the rolls can be arbitrarily adjusted, and the apparatus as a whole can be made compact in external form.

■ Since a position holding means is provided between the main shaft and the roll holder, it is possible to suppress the run-out of the outside diameter of the roll, making it ideal for manufacturing thin-walled pipes. Further, since the load is not transmitted to the threaded portion of the adjustment shaft by encouraging the position holding means, the threaded portion will not be damaged.

■ Roll spacing can be adjusted extremely easily and quickly by simply operating the position holding means and handle, minimizing downtime on the production line.

■ By using a precision thread for the threaded part of the adjustment shaft and its threading, and by detecting the amount of movement of the minute roll with a digital gauge, the roll spacing can be adjusted in one step.
It can be performed with high precision on the order of /100M.

■ Product quality can be stabilized.

[Brief explanation of drawings]

The drawings show embodiments of the invention, A front view, Figure 2 is a cutaway front view, It is a sectional view taken along the mm line. l...Main shaft 2a 3a, 3b...roll holder 4a, 4b... position holding means 5a, 5b...divided forming rolls 7... Adjustment axis 8a. 9... Screw mechanism Mechanism a, llb...transmission mechanism 13...Keyway 15...Joining end 16... Universal Joy 17... Screwing member 18...Bearing 19... Detent mechanism 21... Information board 23...Support arm 25...Bearing 27...Digital gauge Figure 1 shows Figure 3 shows cutting flat Figure 1 2b...stand 6...Relay shaft 8b...neck part lO...screw element 12...handle 14...key nt 20... Guide rod 22...Support shaft 24...Rotating joint 26...bar 41a, 41b 42a, 42b 43a, 43b Mechanism 2a, Mechanism 2b ...Hydraulic chamber ・・・Thin diameter reduced part ...Song selection ···bearing Mechanism 1a, l1lb Mechanism 3a, Mechanism 3b ・・・Rotating joint ···rod

Claims (1)

[Claims] A pair of left and right cylindrical roll holders are fitted onto the outer periphery of the intermediate portion of a hollow main shaft which is supported on both sides so as to be able to slide freely in the axial direction, and a position holding means is provided to stop the roll holders at any desired position.
A pair of left and right split forming rolls are fixed to the inner ends of both roll holders, and a hollow relay shaft that mechanically connects the main shaft to the driving means is connected to one end of the main shaft so as to be freely forward and backward. , the main shaft is equipped with an adjustment shaft rotatably penetrating the hollow interior, the adjustment shaft is provided with a pair of threaded parts having different thread directions at both ends, and the relay shaft is attached to one threaded part, and a transmission in which screws are linked to the other screw portion so as to be freely screwed forward and backward, and the screw movement is transmitted between the relay shaft and the one roll holder and between the screw and the other roll holder. A forming roll adjusting device characterized in that a mechanism is provided, and a manual rotation handle is provided at an appropriate position on the adjusting shaft.