JPS5950905A - Rolling device for steel materiay - Google Patents

Abstract

PURPOSE:To open and close easily paired forming rolls at the same amt. by providing paired chocks to the forming rolls, and providing machines for opening and closing the respective chocks by the same amt. via links by the operation of liquid pressure cylinders. CONSTITUTION:The 1st chopper 5A is opened by a link 14 when a liquid pressure cylinder 8 is actuated to turn a lever 7 around a fixed point 6 in an opening direction in a longitudinal roll stand I of a rolling installation. The pin 15 of the link 17 displaces by PXB/A and the pin 16 displaces by the same amt. in the same direction where the displacement on the working line for pressurizing the chock 5A is designated as P, the distance between the connection point 12 of the link 14 on the lever 17 and the stationary pin 6 as A and the distance between the connection point 15 of the link 17 on the lever 7 and the pin 6 as B. The chock 5B is thus opened. If the displacement of the chock 5B on the pressurizing line is defined as P', both chocks 5A, 5B open or close by the same amt. by the equation. C in the equatin is the distance between the fixed point 3B and the working line for pressurizing the chock 5B.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to rolling equipment, and more particularly to an improvement in the opening/closing mechanism of a steel rolling equipment.

Current rolling equipment usually consists of multiple roll stands that perform direct rolling. For example, vertical and horizontal roll stands are arranged in series to feed the rough material, and the rolls sequentially roll the rough material from left to right, A shaped product with a desired cross section is obtained by plastically deforming it up and down.

This type of roll stand consists of a pair of chocks equipped with forming rolls, and the raw material is directly rolled down between the rolls rotated by a drive device, but depending on the thickness of the raw material, the chocks can be used to feed the raw material. It is required to open and close symmetrically with respect to the plane at the same angle.

Figures 1A to 1C show a typical direct rolling horizontal roll stand. Figure 1C shows the case where a thin raw material is supplied.

In FIGS. 1A to 1C, a ball 1' is fixed to the base, and one end of each of an upper chock 3' holding an upper roll 2' and a lower chock 5' holding a lower roll 4' is pivoted to the ball 1'. wear it. Both chips near the pivot joint are meshed with a sector gear 6' and an internal gear 7'. Upper chock 5
The distal end of the extension 8' formed at the other end of the lower chock 5' is pivotally connected to the other end 9' of the lower chock 5' and to the movable end of the hydraulic cylinder 10'. The pressure of the roll against the rough material is maintained by the weight of the upper chock 3', the meshing of the post 1', the sector gear 6', and the inner gear 7'. To open the upper and lower chocks 3' and 5' when the rough material is thick, extend the hydraulic cylinder 10', make the extension part 8' oblique, and use the pivot point as a fulcrum to open both chocks S/ and 5/. do. The upper and lower terraces open by the same amount due to the meshing of the sector gear and the internal gear, but as mentioned above, the extension part 8' and the hydraulic cylinder 1
Since 0' is oblique, an unnecessarily large force is required to open the opening angle. Also, in order to open the same amount when the rough material is thin, the first
Although it works well as shown in Figure C, it is undesirable because the extension part 8' and the lower chock 5' tend to physically interfere with each other. Therefore, it is difficult to maintain a sufficiently large gap between the upper and lower rolls due to the above constraints. Furthermore, since the distance between the pivot joint and the connecting part of both the upper and lower chocks is long, both the upper and lower chocks S
A large bending moment will be applied to / and 5/.

The present invention is aimed at eliminating the above-mentioned drawbacks, and is aimed at eliminating the above-mentioned drawbacks. The second chock and the fluid pressure cylinder for opening and closing the chock are connected to the first chock. Second
Place one end of each chirotsuk into the first. In a steel rolling machine in which each chock is pivotally connected to a second fixed point and configured to have rotation r-f capability, a lever is provided whose intermediate portion is pivoted to a third fixed point, and one end is pivoted to an identification point. The other end of the hydraulic cylinder is pivotably supported by one end of the lever and is expandable and retractable by fluid pressure, and between the pivot point of the hydraulic cylinder and the fifth fixed point, the lever and the first The chock is connected to approximately the center of the forming roll by a first link, and the other end of the lever is connected to the free end of the second chock by a second link to form a five-bar chain mechanism. , provides a steel rolling equipment in which each of the above members is arranged in a relational position obtained from the following equation, and the chocks of 1.Pg2 are opened and closed by the same amount.

B: Hei (A+fl+C): C However, B>A here,
A is the distance between the first link connection point and the third fixed point on the lever, B is the distance between the second link connection point and the fifth fixed point on the lever, and C is the second fixed point. and the line of pressure action of the second chock.

Hereinafter, the present invention will be described in detail with reference to the drawings.

Figure 2 is a plan view of a rolling installation 1 in which a vertical roll stand ■ and a horizontal roll stand ■ are arranged in series on a fixed table 1;
FIG. 3 is a side view of FIG. 2. The rough material is fed in the direction of arrow X.

First, Kai Roll Stand I will be explained.

The first part of the fixing bracket 2 attached to the fixing base 1. The second vertical fixed bins 3A and 5B have two chocks 5A and 5B, respectively, which rotatably hold both ends of the forming rolls 4A and 4B.
Pivotally attach one end of the. Therefore, both f y y ri 5 A
, 5 B i,j ,”:'N 1 , , Y 2
No solid 'S Hiy 3A.

It can be opened and closed horizontally using 3B as a fulcrum. The above-mentioned forming rolls 4A and 4B are equipped with a speed reduction device and a drive unit (not shown).
They are rotated and driven in opposite directions by the device to roll a rough material (not shown).

A third vertical fixing pin 6 is provided on the fixing base, and in this embodiment, a lever 7 whose intermediate portion is pivotally supported by the fixing pin 6 is provided. The tip 9 of the piston rod of the fluid pressure cylinder 8 for opening and closing the chock is pivotally connected to the first fixing pin 3A, and the lever 7 is attached to the pin 11 provided in the cylinder portion 1o of the fluid pressure cylinder 8. Pivotally connect one end of the A bin 12 is provided in the middle of the lever 7 between the sixth fixing pin 6 and the bin 11, and the bin 12 and the bin 13 provided in the chock 5A of 8F'V1 are connected by a first link 14.

Both ends of the link 14 pivot into pins 12, 13, respectively. The links 14 are arranged so that their axes are on the same line as the line of pressure action of both rolls 4A, 4B. Further, a vertical pin 15 is provided at the other end on the opposite side of the pin 11 with respect to the fixed pin 6 of the lever 7, and is connected to a vertical pin 16 provided at the free end of the second chock 5B by a second link 17. do. m
≠The lower link 17 is the roller 18 mounted on the fixed base 1
to hold it horizontally.

Horizontal roll stand ltJ [Since it has almost the same structure as roll stand I, parts with similar functions are designated by the same reference numerals. If a horizontal roll stand is configured with a fluid pressure cylinder like a vertical roll stand, the total length of the cylinder will be long and the installation foundation will need to be dug down. It uses a cylinder.

In this case, the cylinder portion 10 of the fluid pressure cylinder 8 was pivotally attached to the fixed bracket 2, and the tip portion 9 of the piston rod was pivotally attached to one end of the lever 7.

Figure 4 is a sectional view taken along line IV-1'/ in Figure 2, Figure 5 is a sectional view taken along line v-■ in Figure 2, and Figure 6 is a sectional view taken along line ■-■ in Figure 3. Cross-sectional view, Figure 7 is shown in Figure 3.
A cross-sectional view of the −■ line is shown.

The present invention is configured as a five-bar chain mechanism as described above, and in order to open and close the forming rolls, in other words, the chocks by the same amount, each member is configured in the following relationship (No. 8 showing a plan view of the vertical roll stand). (See Figure 9, which shows a side view of the yellow roll stand).

B: A = (A + B 1 C): C B > A...
(1) Here, A is the distance on the lever 7 between the connection point 12 of the link 14 of the filter 1 and the fixed bottle 6 of the jet 3, and the distance between the connection point 15 of the second link 17 on the lever 7 and the 3
Assuming that the distance between the fixed bins 6 and C indicates the middle = tt between the pressure action line of the second fixed point 3B and the second chock 5B, the normal bin 16 is Since it is provided at a position symmetrical to the second fixed point 3B, the bin 1
The distance between the pressurizing line of action of chock 5B of 6 and 'A2 is CT
i is equal to A+H.

Now, when the hydraulic cylinder 8 is activated and the lever 7 is rotated in the direction of opening the lever 7 around the fixed point 6 of the holder 3, the first chock 5A is opened via the first link 14 connected thereto. . Let P be the amount of displacement of the chock 5A on the line of pressure action.

Therefore, based on the above-mentioned relationship, the bin 15 of the second link 17 is displaced by PXλ in the direction of the arrow, and accordingly, the bin 16 of the second link 17 is also displaced by Pxλ in the same direction. The second terror 5B opens due to the above displacement.

If the amount of displacement of the chuck 5B on the pressure line is P, then both chocks 5A and 5B are always opened and closed by the same amount. Of course, the chocks can be closed by reversing the operating direction of the hydraulic cylinders, thus making it possible to open and close both chocks in the same manner. Further, the force acting on the upper roll 2 and the force acting on the lower roll 4 are always the same.

Since the other end of the chock 5A is free and there is no need to worry about it being removed by any other member, the portion of the chock on the free side from the line of pressure action can be omitted.

In the above explanation, the chock was explained as being symmetrical with respect to the line of pressure action, that is, A + B = C, but it was made into an asymmetrical shape and A + B
>C or A+13<C.

As described above, the steel material rolling apparatus H''J:J of the present invention has the following.

(1) It is easy to open and close the paired rolls by the same amount, and it can be solved with a simple lever mechanism.

(11) Since one end of either chock is free, the chock can be shortened, and therefore the bending moment applied to the chock can be reduced, resulting in a compact structure.

(110) When both chocks open and close, the movable members do not come into contact with each other or interfere with each other, so the gap between the forming rolls can be adjusted over a wide range.

(ψ The second link that connects one chock and the lever does not swing sideways but moves in the direction of its axis, so the power transmission efficiency is good, and the cylinder also moves in the opening and closing direction of the chock. Since it acts in a substantially parallel direction, the opening/closing force of the chock is relatively infertile.

[Brief explanation of drawings]

Figures 1A to 1C are schematic side views showing the operation of a conventional steel rolling machine, Figure 2 is a plan view of the steel rolling machine of the present invention, Figure 3 is a side view of Figure 2, and Figure 4 (ri IV-M in Figure 2
5 is a sectional view taken along line ■-V in FIG. 2, FIG. 6 is a sectional view taken along line ■-■ in FIG. 3, and FIG. 7 is a sectional view taken along line ■-V in FIG. ■Cross-sectional view of the line, No. 8
9 and 9 are schematic diagrams showing the same amount opening/closing mechanism of the steel rolling equipment of the present invention. 3A...First fixed point, 3B...Second fixed point, 4 A, 4 B...Forming roll, 5A...Chock of Toma 1, 5B... Second chock, 6・・・
・Sixth fixed point, 7... L/bar, 3... Fluid pressure cylinder, 11... Pivotal point of fluid pressure cylinder, 14... First link, 17... Second link.

Claims (1)

[Claims] 1. A pair of first rollers each having a forming roll. The first chock includes a second chock and a fluid pressure cylinder for opening and closing the chock.
．． In a steel rolling machine in which each of the second chocks is rotatably formed by pivoting one end of each second chock to the first and second fixing points, a lever having an intermediate portion pivoted to the third fixing point is provided. The hydraulic cylinder is provided, one end of which is bent to a fixed point, and the other end of which is pivoted to the lever and which is expandable and retractable by fluid pressure. A first link connects the lever and approximately the center of the forming roll of the first chock between fixed points, and a second link connects the other end of the lever and the free end of the second chock. The above members are connected to form a five-bar chain mechanism, and each of the above members is placed in a relative position obtained from the following equation. A steel rolling equipment in which the second chock is opened and closed by the same amount. B:A:(A+B+C):Cwhere B>A, where A is the distance between the connection point of the first link on the lever and the third fixed point, B is the connection point of the second link on the lever and the third fixed point, and C indicates the distance between the second fixed point and the line of pressure action of the second chock.