JPS5829508A - Pilger rolling machine and tool replacing method - Google Patents

Abstract

1. A pilgrim-type cold rolling mill and with mobile housing, comprising a frame associated with the rolling mill which slides laterally relative to said rolling mill and thus allows withdrawal of the integral assembly of rolls and their associated mechanisms, characterized in that rocking means constituted by a cradle mounted on a spindle or on rollers, are capable of acting on the said frame with its assembly of rolls and their associated mechanisms so as to incline the plane containing the axes of the rolls until this plane reaches the desired inclination.

Description

[Detailed description of the invention] U3ru ρ゛! Regarding the location. Although the apparatus of the invention can be used in field hot arsenal mills, it is particularly suitable for use in cold pilger mills.

In this type of rolling mill, as disclosed for example in French Patent No. 1,602,013, the stands supporting the rolls of the rolling mill perform a reciprocating motion on the material to be rolled synchronously with the rotation of the rolls. During this time, the material to be rolled advances intermittently through the path between the rolls. The work rolls of these rolling mills usually consist of cylinders rotatably mounted on bearing pedestals carried on stands. The stand carries out a reciprocating movement along the rolling axis, and the rotation of the rolls relative to the material to be rolled is ensured by fixed racks. The stand also has a structure capable of resisting the separation forces of the rolls during rolling, thus holding the rolls precisely in position.

The work rolls have apertures or grooves that give the rolled material the desired shape. When the roll is an integral member, it is referred to as a circular grooved roll, and when the roll is formed by a grooved collar or shell secured to a stationary mounting block, it is referred to as a semicircular grooved roll.

During the normal operation of a rolling mill such as those mentioned above, it is necessary to change the work rolls or replace the cage of the work rolls, for example to change the dimensions to be rolled, to grind worn grooves or to maintain the rolling mill.
must be easy to replace.

In the conventional method, such replacement of the work roll or the collar of the work roll is a time-consuming and difficult operation, which has the disadvantage that it takes a long time to stop the rolling mill and stop the work.

Furthermore, the heavier the roll, the more dangerous the operation.

For example, in a large rolling mill that can process tubular blanks with an outer diameter of 2oo * Extremely dangerous.

Various methods are known for changing rolls or roll collars on existing rolling mills.

According to the first method, work is performed manually on a stand that has been stopped and positioned within the rolling mill.

In the case of a roll with a collar, the collar can be removed without removing the roll block.

Such manual work is extremely difficult and dangerous since the equipment is closed and the surrounding area is lubricated by the equipment's lubricant, and the parts to be handled are heavy.

Furthermore, since the work is already being carried out on the stand of the rolling mill, it is not possible to carry out other work at the same time on or near the stand, such as changing accessory tools such as pipe pliers. Therefore, the total time required for tool exchange is extended.

Another known method is to fix the assembly of the two work rolls and their respective bearing pedestals when the mill is stopped, and to fasten the assembly to a frame that slides transversely with respect to the mill. The frame is often permanently connected to the rolling mill, engages an assembly of two rolls within a stand of the rolling mill, and then disengages the assembly from the stand and moves it transversely relative to the mill. move in the direction. With this known device, maintenance of the rolling mill is made very easy, since all or part of the work rolls can be replaced outside the actual rolling mill stand. However, in this device, the two work rolls are mechanically fixed and maintained in a vertically overlapping state similar to the work position in the stand. Access to the lower work rolls therefore requires removal of the upper roll assembly with its bearing pedestals and tools. That is, in order to perform a roll replacement operation, the assembled two roll assembly must be transported to a work site.

The object of the invention is to provide an improved device which makes it easier to replace all or part of a working roll, especially in the case of rolls with collars or shells.

The pilger rolling mill of the present invention is coupled to the rolling mill.
It includes a frame that slides transversely relative to the mill and thus allows the assembly of rolls and their attachments to be ejected from each other. Furthermore, pivot means are provided for acting on the frame to tilt the plane passing through the roll axis so that the plane reaches a desired inclination when the assembly of the roll and its attachments is fixed to the frame. There is. In many cases, the rotation means may tilt the plane while maintaining the initial orientation of the axis of the roll. Preferably, the plane can be inclined to a horizontal plane or near a horizontal plane.

These rotating means may be mounted on rollers moving on rails with appropriate curvature, or may be rotatably mounted on a single shaft with nine rockers, or may be mounted parallel to a plane passing through the axis of the roll. Any known means capable of rotation with optional movement may be used. The invention will be explained below with reference to the accompanying drawings, which show specific non-limiting embodiments.

The pilger rolling mill 1 shown in FIG. 1 comprises a stand with supports 2.3 and two work rolls 4.3 with bearing stands 5-5', 6-61 and rotary drive pinions 7.7'. 4'. Two rolls 4.4' and a bearing stand 5- for each roll.
5' and 6-6' are fixed to each other by a known method via rods and bolts. Reference numeral 6A indicates the receiving portion of the bolt head. In FIG. 1, the assembly of rolls 4.4', bearing stands 5-5', 6-6' and drive pinions 7.7' has escaped from the stand of rolling mill 1 and is placed on frame 8.
is fixed to. According to the prior art, the υ frame 8 can be slid laterally relative to the assembly of the rolling mill 1. In this device, the front rack 9 is raised and then the two rolls 4
．． The assembly of 4' and attachments can be easily removed from the stand of the rolling mill 1. However, in order to approach the lower roll 4 and the bearing stand 5.6, the upper roll 4
' and the attachments 5', 6', 7' must be removed. Considering the general mechanism of a rolling mill, the area where the two roll assemblies exist is extremely dense in the area close to the original rolling mill, so it is difficult to place the upper cylinder temporarily. Unable to do complicated work. Considering that it is difficult to adjust the two block rolls stacked one above the other, attached members 5-5' and 6-6
', 7.7' is a suitable solution to transport the assembly to the workshop. However, in large rolling mills, such assemblies weigh approximately 8 to 10 tons, making them extremely difficult to handle.

Figures 2.3 and 4 show a cold pilger mill 10 including a stand 11 constructed in accordance with the invention. Two work rolls 12.12' and bearing stands 13-13', 14-1
4' and rotary drive pinion 15, 15' is mounted on a frame 16 which is itself fixed to a rocker 17 mounted on a horizontal shaft 18 parallel to the axis of one work roll and perpendicular to the rolling axis. obtain.

The axis 18 moves the rocker 17, the frame 16 and the assembly of two rolls 12.12' with attachments in a vertical plane parallel to the rolling axis, i.e. parallel to the axis of movement of the material to be rolled. The rolls 12, 12' are then rotated while maintaining their axes in the same orientation.

According to FIGS. 3 and 4, the device includes a roll 12.1
2' performs only half-rotation work and the work groove 19.1 of the roll
It is particularly advantageous in bottle rolling mills where the 9' can be engraved on a removable collar in the form of a no-fusiel. In this case, these collars 20, 20' constitute wear parts, but they can be easily replaced relatively frequently. The weight of the collar is small compared to the assembly, approximately 500 to 700 kg per half shell. As shown in FIG. 4, in the horizontal position of the rocker 17, two relatively lightweight collars 20.2
Both 0' are simple transport cranes with a capacity of less than 1 ton■
) can be handled by

There is no need to disassemble the upper roll 12' and attachment assembly, and the lower and upper two collars 20' can be replaced on the fly. The two collars 20,20' can be moved or adjusted in position relative to the shaft 21.21' of each work roll 12.12' and the remaining part of the roll 12.12'. Shaft 21.21'
It can be adjusted and fixed against.

Replacing the collars 20, 20' and their attachments is extremely easy.

The device for laterally driving the frame 16 is shown schematically in FIG. 2 as a pre-jacket 22. The frame 16 further includes a jack 23 for actuating a known ramp device by which the assembly of rolls 12, 12' and attachments can be grasped and pulled out to remove it from the stand 11 of the rolling mill 10.

The rotation device of the foot/arm 16 using the rocker 17 is constructed in such a way that it can utilize a small amount of free space and does not obstruct the passage of the mechanical equipment of the rolling mill.

Therefore, the pace 25 is provided with a through hole 24 through which a shaft for controlling the rotation of the material to be rolled is inserted.

In this way, the rolling mill motion control assembly (rolling motion,
The assembly of the tool changer (rotary movement, forward movement) and the tool changer are located on the same side of the rolling mill with respect to the vertical plane passing through the rolling axis, and the other side of the rolling mill is left completely as a three-space. .

The device for controlling the rotation of the rocker 17 on the rotation of the shaft 18 is not shown. The device may be constructed in a variety of ways known to those skilled in the art.

Furthermore, it is of course possible to configure the frame 16 so that it can move laterally and then freely rotate together with the rocker 17 to ensure that the roll assembly fixed to each other can escape from the stand 11 of the rolling mill 10. It is possible.

The rocker 17 has side surfaces 26 for supporting the bearing pedestals 1.3-13', 14-14' during rotation of the rocker 17 as shown in FIGS. 3 and 4.

At the end of the stroke the surface 26 of the rocker 17 is at the stop 2
7.

The use of the device can be easily understood by way of the example shown in FIG. 2.3.4. The operation for exchanging the collar 20, 20', for example, begins with the raising of the rack 28. The bearing stands 13-13' and 14-14' are connected to each other by a connecting means (not shown).
Fix each other one by one. Advance the frame 16 below the roll 12.12' and the lower bearing pedestal 13.14. The roll assembly is pulled out from the stand 1211 by the action of the jack 23. As shown in FIGS. 2 and 3, the assembly of the rollers 12, 12' and attached members placed on the frame 16 is taken out laterally in the direction of arrow F by the action of the jack 220. The frames 16 are sufficiently spaced apart and the rolls 12.
12' reaches above the rocker 17, the rocker is moved to the axis 1.
8 rotations υ, thereby rotationally driving the assembly of the frame 16 and the rolls 12, 12'. As shown in FIG. 4, at the end of the stroke the rolls 12 and 12
The axes of ' are in the same substantially horizontal plane, and the rocker 17 abuts the stop 27 . Therefore, the entire operation of replacing the collars 20, 20' can be easily carried out. Finally, the rocker 17 is rotated in the opposite direction, the frame 16 is then translated in the opposite direction, and the two rolls 12,
Return to the specified position inside.

In the case of a rolling mill, the total time required to change the tool for a roll of outside diameter 70 (MlH) with a half-shell collar (〕9
It has been found that the time required to change out accessory tools such as blade pliers) is reduced by almost half the time required to perform the same operation on a conventional rolling mill using any of the prior art techniques. Ta.

Although the invention has been described in terms of specific embodiments, any pilger mill incorporating such equipment is within the scope of the invention. For example, the rolling mill may include support rolls in addition to the work roll, or the work roll may have a plurality of grooves distributed over the entire length of the table.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view of a roll changing device using a sliding frame of the prior art, Fig. 2 is a sectional view perpendicular to the rolling axis of the device of the present invention, and Fig. 3 shows that the axis of the roll is before rotation. Figure 4 shows a side view of the rotation device as seen in the direction of the axis XX' in Figure 2 when the rotation device is in the vertical plane of the frame, and Figure 4 shows the axis of the work roll being in the horizontal plane for color exchange after rotation of the frame. FIG. 2 is a side sectional view taken along the midline Bean' in FIG. 2 when doing so. ■・・・Rolling mill, 2, 3... Support, 4, 4'...
・Work roll, 5-5', 6-6'...Bearing stand, 7
, 7'...pinion, 8...frame, 9...
Rack, 10...Rolling machine, 11...Stand, 1
2, 12'...Work roll, 13-13', 14-1
4'...Bearing stand, 15.15'...Pinion, 1
6...Frame, 17...Rocker, 19
．． 19'...Groove, 20.20'...Color. November 11, 2011 Imamura Original Procedural Amendments Commissioner of the Patent Office Kazuo Wakasugi 1, Indication of Case Patent Application No. 136193 of 1982
No. 2, Title of the invention Pilger rolling mill and its tool changing method 3, Relationship to the amended case Patent applicant name Parlook 4, agent 1-14 Shinjuku, Shinjuku-ku, Tokyo
No. Yamada Building 5, Date of amendment order Showa year, month, day spontaneous 6, Number of inventions increased by amendment 7, Subject of amendment Description / - 8, Contents of amendment The scope of claims in the description has been amended as shown in the attached sheet. 2. Claims (1) An assembly of rolls and roll attachments connected to a rolling mill and sliding transversely relative to said rolling mill, thereby securing each other to one another. includes a frame configured to be withdrawn, and pivoting means secures the roll and roll attachment assembly to tilt the plane through the axis of the roll until the desired slope is reached. (2) A pilger rolling mill, characterized in that the rotating means is capable of tilting a plane containing the axes of the rolls while maintaining the initial orientation of the rolls. The pilger rolling mill according to claim 1. (3) The rotating means is capable of tilting a plane including the axis of the roll to a horizontal state. (4) The rolling mill according to any one of claims 1 to 3, wherein the rotating means comprises a rocker mounted on a shaft. 5) The rolling mill according to any one of claims 1 to 3, wherein the rotating means comprises a rocker attached to a roller. (6) The base supporting the rocker is The rolling mill according to any one of claims 1 to 5, characterized by having a through hole through which a shaft for controlling the rotation of the material to be rolled can be inserted. (7) Rotary movement, forward movement A patent characterized in that the assembly of mechanical devices of a rolling mill, each having a motion and a rolling motion, and the rotating device of a roll assembly fixed to each other are located on the same side with respect to a vertical plane passing through the rolling axis. A rolling mill according to any one of claims 1 to 6. A pilger rolling mill according to any one of claims 1 to 6. (9) Assembly of rolls and roll-using members from the stand of the rolling mill by parallel movement of the frame. In the method for replacing rolls in a pilger rolling mill from which rolls are taken out, the frame to which the assembly of rolls and roll attachment members is fixed is fixed to a rotating means, and the plane passing through the axis of the rolls is tilted as desired. actuate said pivoting means so as to reach a slope or, in most cases, a horizontal position, then carry out the operations necessary for disassembly, repair or replacement and reassembly of the collar of the roll in sequence, and after reassembly, turn the rotation means. The method is characterized in that the plane passing through the axis of the roll is brought into a vertical state using moving means, and then the assembly of the roll and roll attachment is reinstalled in the stand of the rolling mill by translation of the frame. How to change rolls on a pilger rolling mill. 10. A method as claimed in claim 9, characterized in that the pivoting means are capable of tilting the plane passing through the axis of the roll while completely maintaining the initial orientation of the roll.

Claims (9)

[Claims] (1) A frame connected to a rolling mill and configured to slide in a transverse direction with respect to the rolling mill so that an assembly of a roll and a roll attachment member fixed to each other is pulled out. b. Pivoting means are capable of acting on the frame to which the roll and roll attachment assembly is fixed in order to tilt the plane passing through the axis of the roll until the plane reaches the desired slope. Pilger rolling mill. (2) A pilger rolling mill according to claim 1, characterized in that the rotation means is capable of tilting a plane containing the axis of the roll while maintaining the initial orientation of the roll. (3) The pilger rolling mill according to claim 1 or 2, wherein the rotating means is capable of tilting a plane including the axis of the roll to a horizontal state. (4) The rolling mill according to any one of claims 1 to 3, wherein the rotating means comprises a rocker mounted on a shaft. (5) The rolling mill according to any one of claims 1 to 3, wherein the rotating means comprises a rocker attached to a roller. (6) The base supporting the rocker has a through hole through which a shaft for controlling the rotation of the material to be rolled can be inserted. rolling machine. (7) The assembly of mechanical devices of a rolling mill that performs rotational motion, forward motion, and rolling motion, respectively, and the rotating device of the roll assembly that are fixed to each other are located on the same side with respect to a vertical plane passing through the rolling axis. A rolling mill according to any one of claims 1 to 6, characterized in that: (8) In the roll exchange method for a pilger rolling mill in which the assembly of the roll and roll attachment member is taken out from the stand of the rolling mill by parallel movement of the frame, the assembly of the roll and roll attachment member is fixed. The frame is fixed to a pivoting means, said pivoting means is actuated in such a way that the plane passing through the axis of the roll is tilted to reach the desired slope or, in many cases, a horizontal state, and then the collar of the roll is disassembled. , carry out the necessary work for repair or replacement and reassembly in sequence, and after reassembly, use a rotating means to raise the plane passing through the axis of the roll to a vertical state, and then move the frame parallel to the roll and roll. 1. A method for changing rolls in a pilger rolling mill, characterized in that the assembly with attached parts is reinstalled in the stand of the rolling mill. (9) This method in which the pivoting means can tilt the plane passing through the axis of the roll while fully maintaining the initial orientation of the roll.