JPS5942105A - Assembly roll for rolling - Google Patents

Abstract

PURPOSE:To prevent the failure of the bolt of a wedge block which fixes a roll ring to a roll shaft by a side pressure and to increase the durable times of the shaft by forming said bolt into the construction wherein the roll ring is fixed without screwing the bolt to the roll shaft. CONSTITUTION:When a block bolt 9 is turned and advanced in the axial center direction of a roll shaft 1, the tip 9a of the bolt 9 contacts with the shaft 1 and the bolt 9 itself cannot advance any longer and stops. When the bolt 9 is further turned, such force that detaches a wedge block 8 from the shaft 1 is loaded on the block by as much as the bolt turns. Force is acted on side pressure rings 6,7 by the wedging effect between the tape 8a of the block 8 and the expanding tapers T1, T2 of the rings 6, 7 and compressive force is acted on a hard roll ring 5, by which the ring 5 is positively fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the structure of mounting assembly rolls for rolling, particularly hard roll rings made of cemented carbide or the like, to a roll shaft.

Conventionally, methods for attaching a roll ring to a roll shaft in an assembled roll include a shrink fitting method, an adhesive method using a special adhesive, and a side pressure tightening method in which a pattern is tightened using a hydraulic unit or bolts. Among these, the law for lateral pressure tightening is
Since stress is applied to the roll ring by lateral pressure to alleviate the stress generated in the roll ring during rolling, it is effective in preventing breakage during rolling, and is a safe roll ring mounting method. It can be said. In addition, lateral pressure tightening is a method in which a model block is pushed between lateral pressure bodies using bolts, and lateral pressure can be applied by the lateral effect, so there is no need for expensive jigs such as hydraulic units, and torque wrenches, etc. It can be done with simple tools.
It also has some advantages.

The above-mentioned lateral pressure tightening shall be performed using the Japanese Patent Application Laid-Open No. 54-1999
There is such a device as described in Japanese Patent No. 35857, and an example of the main structure thereof is shown in FIGS. 1 and 2.

That is, by screwing the pole (58) into the hole (51) and tightening the wedge protrusion (57), the hard part is inserted through the lateral pressure receiving rings (55) and (56) by the resultant part. The roll ring (54) receives side pressure, is tightened between the flanges (52) and (59), and can be attached to the roll shaft (50).

However, in this configuration, the following problems remain because the pole (58) is screwed into the screw hole (51) of the roll shaft (50).

That is, in order to generate lateral pressure, the shaft block (57) is tightened by the pole I- (58) in the roll shirt +- (50) direction, so a large tension is applied to the bolt (58). Therefore, in order to increase the side pressure, Pol 1. It is necessary to increase the diameter or increase the number of holes (51), and to support the tension generated in the holes (51).
must be deepened.

Therefore, the more the C2 side pressure is increased, the more it becomes necessary to increase the number, i and depth of the furnace holes (51) as described above. Providing such a hole (51) in the roll shaft (50) causes a decrease in strength due to stress concentration, but the greater the lateral pressure, the greater the decrease in strength. And roll shaft (50)
Since it receives a tensile force commensurate with the side pressure generated between the flanges (52) and (59), there is a risk of the rolling load being applied to it during use and causing it to break starting from the hole (5I). more likely to occur. Furthermore, since a high tensile force is acting on the bolt (58), the screw thread of the hole (51) is 1.
It also has the disadvantage that it is easy to break and the number of service life of Roll-n-Yaf L-(50) is reduced.

The present invention aims to solve the following two problems, and by creating a structure in which side pressure can be generated by the cutting block without threadingly connecting the pole 1- to the roll shaft, the roll shirt l- It is an object of the present invention to provide an assembly roll for rolling that can prevent a decrease in strength or breakage and can reliably apply lateral pressure to a roll ring.

Embodiments will be described below based on embodiments shown in the accompanying drawings.

In Fig. 3, (1) is a roll shaft having the same structure as that described in the conventional example (Fig. 1), with a flange (2) at one end and a male terminal (3) integrated at the other end. A hard roll ring (5) is installed between the screw-formed flange (4) which is formed as a C hole and is screwed into the #P screw (3), and the flange (2).
, side pressure rings ((il, (71)) are arranged, and a mock prong (8) is located between the both side pressure rings (61, - (7)).

As shown in Fig. 4, a °ζ groove (G) is formed in the radial direction on the negative side of the side pressure ring (6) at a required circumferential pinch, and as shown in Fig. 3, the IR groove (G) is formed in the direction of the center. It is configured to have a widening taper (T+) so that the depth increases.

The side pressure ring (7) is also provided with a groove (G) having a widening taper (T"2), and the side pressure ring f61
．． (71 is arranged on the same axis with its i (G) forming surfaces facing each other and across, and the wedge block (8) is arranged as shown in Fig. 3 with the grooves (G) aligned with each other. This cutting block (8) is narrower than the groove (G), has a taper (8a) having the same slope as the expanding taper (T+), ('r2), and has a hole in the center. (8b
) are layered in the axial direction of the roll shirt +11, and the tightening pole 1 (9) is rotatably screwed into the sympathy hole (8b) from the outside.

In the above configuration, when the tightening bolt (9) is rotated and advanced in the axial direction of the roll shaft (1), the tightening bolt (9)
The tip (9a) of 9) comes into contact with the roll shaft fl),
If it is rotated further, the tightening pole +-+91 itself will not be able to advance and will stop, and the wedge block (8) will move in proportion to the amount of rotation.
A force is applied to move the roll shaft (1) away from the roll shaft (1). As a result, the tailing (6) of the wedge block (8)
), (71, and compressive force is applied to the hard roll ring (5
) is received, and the ring (5) is securely fixed.

In fixing the hard roll ring (5) as described above, the tightening bolt (9) simply receives a compressive force as a reaction force from the roll shaft (1), and the energized bolt using structural metal abrasive has a high compressive strength. Since this is greater than the tensile strength, the bolt (9) will not be damaged and a large lateral pressure can be generated. Furthermore, tighten the roll-on yaf 1-(1) (
Since there is no need to provide a screw hole for the 916 joint, a large lateral pressure can be obtained without reducing the strength of the roll shaft (1), and there is no possibility that the screw hole of the roll shaft will be destroyed and become unusable when replacing the roll ring. It is possible to increase the service life of the roll shaft (11).In addition, during assembly, there is no need to perform the centering process of aligning the wedge hole with the screw hole of the roll shaft as in the past, making replacement work easy. It is.

Furthermore, during assembly, a huge force is applied to the tightening bolt (9) and the dowel hole (8b) when they are fastened together, but this requires increasing the thickness of the wedge block (8) and increasing the threaded ridge of the dowel hole (8b). By increasing the number, the strength can be increased. Further, since there is no need for a deep screw hole as in the conventional case where a screw hole is provided in the roll shaft, there is no need to worry about a decrease in strength.

Even if the hole (8b) of the machine saw or the mock block (8) is damaged, only this block needs to be replaced, which has the advantage of being economical.

A second embodiment is shown in FIG. 6, and this embodiment is an example of an optimal assembly configuration for actual use.

In the figure, the same components as shown in FIG. Furthermore, a hard roll ring (5') is used to apply lateral pressure between the hard roll ring (5') and the lateral pressure ring (6).
Separate rings (21) are arranged to apply a load evenly to each other. Two hard roll rings (5') as shown,
? The outer diameter of (20) and the separate ring (21) is larger than other rings, and the outer diameter line (in the figure) at the time of disposal after being used for rolling is Other rings (indicated by broken lines (B, L)), ie, lateral pressure ring (6).

(7) The threaded flange (4) should have a small diameter. With this configuration, even if the roll is discarded and reused next time, the hard roll ring (5') and separate ring (2
1) and the auxiliary flange (20) only need to be replaced, which is economical.

In addition, in case of disassembly, first remove the separate ring (2I
) with a lathe etc. to release the compressive force, loosen the threaded flange (4) or tighten the tightening bolt (9).
), place a protective pad on the top of the wedge block (8), and hit it with a hammer to release the side pressure, and then loosen the threaded flange (4) in the same way. It can be done with

In the above two embodiments, both side pressure rings (61, grooves on f7+)
G) and expanded taper (T+), ("I"2)
The wedge block (8) is also provided with tapers (8a) on its two sides that match the expansion tapers (T+) and (Tz>), as shown in Fig. 7 (a+, (
Insert the groove (G') into the side pressure ring (shown by bl) on the side (-).
6') or (7'), and the mock block (8')
Even if a taper (8a') is formed only on the - side in ), a wedge effect similar to that described in section 2 can be achieved, and the lateral pressure can be reliably applied. In addition, Fig. 7 (C1 is a case where only a lateral pressure ring (6") is provided, and this (lateral pressure ring (6") is replaced with a hard 1 call ring (5") 1° 11
11, and a wedge (8") with a taper (8a") formed on the - side is placed between the wide open taper (T+") and the threaded flange (4"). be. In this case as well, lateral pressure can be applied by a similar wedge effect.

Although all of the above has been described with reference to the embodiment in which the tip of the bolt 1 directly contacts the surface of the roll shirt 1, the same effect can be obtained and It is clear that this prevents scratches on the surface of the roll shaft.

As described above, according to the present invention, the hard roll ring can be stably fixed, and there is no damage to the tightening bolts.
Moreover, since there is no damage to the roll shaft itself, the number of times it can be used increases and it is economical.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part showing a conventional example, FIG. 2 is a view taken along the line 1-1 in FIG. The figure is a front view of the side pressure ring seen from the groove forming side in Fig. 3, Fig. 5 is a view taken along the line nn in Fig. 3, and Fig. 6 is an assembly roll assembly for rolling showing the second embodiment. FIG. 7 is a sectional view showing another embodiment. (1) Roll shaft (2) Flange +41. (4″) Threaded flange f5+,
(5'), (5”) Hard roll ring (6+
, (6'), (6''), (71, (7') Side pressure ring +81. (8'), (8'') Wedge block (8a), (8a'), (8a'') Taper (9) tightening bolt

Claims (1)

[Claims] 1. A roll ring is externally fitted onto the above-mentioned 1 coal cylinder between the two flanges formed at both ends of the roll cylinder of the roll shaft, and a lateral pressure ring is similarly externally fitted between the roll ring and the flange, and the same lateral pressure ring is A required number of compression blocks are interposed on the side surfaces of the wedge block, an expanding taper that expands toward the rolled shirt 1 is formed on at least one side of each wedge block, and furthermore, the wedge blocks are placed on the corresponding side surface of the side pressure ring. By forming a taper that aligns with the expansion taper, and fitting a bolt that can move forward and backward toward the roll shaft to each wedge block, and rotating the bolt so that the wedge block moves toward the outer circumference, An assembly roll for rolling, characterized in that the roll ring is fixed to the roll ring l- through a side pressure ring.