JPH0133241B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a sleeve roll for rolling, and more specifically to an assembled rolling roll mainly used for hot rolling of metal rods and wires.

(B) Prior art A so-called sleeve roll, which is an assembly-type rolling roll in which a cemented carbide sleeve is fitted into a steel roll body and fixed by appropriate means, has been known for a long time (for example, Kaisho 53-123362
Publication No. 11928, Japanese Unexamined Utility Model Publication No. 11928, Japanese Patent Application Laid-Open No. 1983-
Publication No. 1158, etc.).

What is shown in the attached Figure 1 is from the above-mentioned Japanese Patent Application Laid-open No. 1983-
No. 1158, a sleeve 3 is tightly fitted around the outer periphery of the tapered fitting part 2 of the roll body 1, and spacer rings 4, 4' are fitted on both sides of the sleeve 3.
Each spacer ring 4, 4' and sleeve 3 are fastened and fixed between a fixing nut 7 screwed into a flange 5 and a threaded portion 6 of the roll body 1. Further, a groove 8 for introducing hydraulic pressure is provided on the outer periphery of the tapered fitting portion 2, and a liquid passage 9 provided inside the roll body 1 is communicated with the groove 8.

When removing the sleeve 3 from the above sleeve roll, first remove the fixing nut 7, then tighten the liquid passage 9.
By introducing hydraulic pressure into the groove 8 through the groove 8, an extremely small gap is created between the sleeve 3 and the roll body 1.
I am beginning to free myself from this. Such a sleeve roll is called a removable sleeve roll because the sleeve 3 can be removed relatively easily.

On the other hand, a structure in which the sleeve 3 is not scheduled to be removed until it reaches the waste diameter has a structure in which the groove 8 and the liquid passage 9 are omitted from the structure shown in FIG. 1, for example.
It is called a completely fixed sleeve roll.

(C) Problems to be Solved by the Invention The removable sleeve roll described above has a problem in that as the tapered fitting surface becomes scratched due to repeated attachment and detachment of the sleeve, it becomes difficult to remove the roll.

When the above-mentioned completely fixed sleeve roll reaches a waste diameter, it may be necessary to disassemble the roll body in order to make effective use of the roll body, but there is a problem in that it is very difficult to remove the sleeve.

(d) Means for Solving the Problems In order to solve the above problems, the first invention of this application provides a rolling sleeve roll in which a cemented carbide sleeve is fitted and fixed to the roll body. A fixing nut is fitted on one side of the sleeve, and a sliding ring is fitted on the other side, and an engaging stepped portion is provided on the inner periphery of the sliding ring, the diameter of which is smaller on the sleeve side, and a shoulder portion that engages with the engaging stepped portion is provided on the roll body. is provided, a hydraulic passage is communicated with the hydraulic pressure acting part formed between the engagement step and the shoulder, and the end face of the sliding ring is in contact with the inner surface of a flange protruding from the roll body. (Hereinafter, referred to as the first invention.) Further, the second invention is a rolling sleeve roll in which a cemented carbide sleeve is fitted and fixed to the roll body, and a fixing nut fitted on one side of the sleeve. An elastic ring is interposed between a sliding ring fitted on the other side, an engaging stepped portion having a smaller diameter on the sleeve side is provided on the inner periphery of the sliding ring, and a shoulder that engages with the engaging stepped portion is provided on the roll body. A hydraulic passage is provided in communication with the hydraulic pressure acting part formed between the engagement step part and the shoulder part, and between the surface of the sliding ring opposite to the sleeve side and the flange of the roll body. In both the first and second inventions, hydraulic pressure is applied to the sliding ring through the hydraulic pressure passage after the fixing nut is removed. Since the sliding ring moves in the axial direction of the roll, a pressing force is applied to the sleeve, allowing it to be easily removed.

In the case of the first invention under normal usage conditions,
The sleeve is fixed by the pressing force of the fixing nut, but in the case of the second invention, the sleeve is further fixed by the pressing force of the elastic ring.

(E) Embodiment The sleeve roll according to the embodiment of the first invention shown in FIG. 2 has a tapered fitting portion 12 provided on the roll body 11, and a threaded portion 13 provided at the end of the fitting portion 12. Further, a shoulder portion 14 having a larger diameter is provided at the other end of the fitting portion 12, and a flange 15 having a larger diameter is provided following the shoulder portion 14.

Fitting a sliding ring 16 on the outer periphery of the shoulder portion 14,
An engaging stepped portion 17 that fits into the large diameter portion and the small diameter portion of the shoulder portion 14 is provided on the inner peripheral surface of the sliding ring 16, and the radial surface of the engaging stepped portion 17 and the shoulder portion 14 are opposed to each other and form a hydraulic pressure acting section 18. A hydraulic passage 19 formed on the outer circumferential surface of the sliding ring 16 is communicated with the hydraulic pressure acting part 18, and between the large diameter part and the small diameter part of the engagement step part 17 and the shoulder part 14. Fit O-rings 20 and 20' respectively,
It has a liquid-tight structure.

One side of the sliding ring 16 is in contact with the flange 15, and the other side is in contact with the spacer ring 21.
The sleeve 22 is tightly fitted to the outer periphery of the tapered fitting portion 12 while being sandwiched between this spacer ring 21 and another spacer ring 21'. Further, a fixing nut 23 screwed to the threaded portion 13 is pressed into contact with the spacer ring 21'.

In the sleeve roll having the above structure, in order to remove the sleeve, after removing the fixing nut 23, hydraulic pressure is applied to the hydraulic pressure acting part 18 through the hydraulic pressure passage 19 of the sliding ring 16. Since the hydraulic pressure moving in the direction of 22 is applied, the sleeve 22 can be easily pulled out.

Note that the above-mentioned hydraulic passage 19 is connected to the roll body 11.
It may also be provided so as to communicate with the hydraulic pressure acting section 18 through. Alternatively, the flange 15 may be omitted, and the force acting on the sliding ring 16 from the sleeve side may be supported by the engaging portion between the engaging step portion 17 and the shoulder portion 14. Further, the spacer rings 21, 21' may be omitted and the sleeve 22 may be directly sandwiched between the fixing nut 23 and the sliding ring 16.

Next, an embodiment of the second invention will be described based on FIG. In the second embodiment, the structure that facilitates the removal of the sleeve 22 is basically the same as that in the first embodiment, so the same parts are given the same reference numerals and the explanation thereof will be omitted. The structure differs from the first embodiment in that two elastic rings 24 are interposed between the sliding ring 22 and the spacer ring 21, and a pressing nut 2 is provided between the sliding ring 16 and the flange 15.
5 is fitted by screw connection, and the sleeve 2
2 is fixed, press nut 25 and flange 1.
5, so that a gap a is created between them.

Although the hydraulic passage 19' is provided in the roll body 11, it may also be provided in the sliding ring 16 as in the embodiment of the first invention (see the chain line in FIG. 3).

The sleeve roll described above compresses the elastic ring 24 by applying hydraulic pressure to the sliding ring 16, and when the sliding ring 16 moves in response to the compression, the pressing nut 25 is advanced by the amount of movement, and the sliding ring 16
press against. After that, when the hydraulic pressure is released, the elastic ring 24 tries to recover, but the pressure nut 25
Since the fixing nuts 23 do not move, the sleeve 22 is fixed by the compressive force of the elastic ring 24 in response to reaction forces from them.

Further, in order to remove the sleeve 22, hydraulic pressure is applied to the sliding ring 16 to release the compressive force acting on the pressing nut 25, and the sliding ring 16 is rotated to retreat in a direction to eliminate the gap a. When the hydraulic pressure is then released, the elastic ring 24 returns to its original state and the compressive force acting on the sleeve 22 disappears, so that the fixing nut 23 and the sleeve 22 can be removed from the roll body 11 in this order. In that case, when hydraulic pressure is applied again to the sliding ring 16, the sliding ring 16 moves and thereby presses the sleeve 22 via the elastic ring 24 and the spacer ring 21. Therefore, as in the case of the embodiment of the first invention, the sleeve 22 can be easily removed.

Note that, as in the embodiment of the first invention, the spacer rings 21, 21' and the flange 15 of the roll body 11 may be omitted, and the elastic ring 24 may be attached to the fixing nut 23 and the spacer ring 21'.
It may be interposed between the fixing nut 23 and the sleeve 22 (if this spacer ring 21' is omitted, between the fixing nut 23 and the sleeve 22).

(f) Effects As mentioned above, in both the first and second inventions, a fixing nut is fitted on one side of the sleeve, a sliding ring is fitted on the other side, and the sleeve is removed by applying hydraulic pressure to the sliding ring. Therefore, the sleeve that is firmly fitted to the roll body can be easily removed.

In addition to the above structure, the second invention provides an elastic ring in addition to the sleeve between the fixed nut and the sliding ring, and a pressing nut is fitted on the opposite surface of the sliding ring, thereby achieving the above-mentioned structure. In addition to the above effects, the sleeve can be further firmly fixed.

Furthermore, in the first invention, since the end surface of the sliding ring is in contact with the inner surface of the flange of the roll body, the pitch p (the first This has the effect of maintaining high accuracy (see Figure 2).

Further, in the case of the second invention, by keeping the dimension of the gap a between the pressing nut and the flange of the roll body constant, the pitch of the rolling groove can be maintained with high precision.

[Brief explanation of drawings]

Figure 1 is a sectional view of a conventional sleeve roll, Figure 2 is a sectional view of a conventional sleeve roll.
The figure is a partially omitted sectional view of an embodiment of the first invention, and FIG. 3 is a partially omitted sectional view of an embodiment of the second invention. 11...Roll body, 14...Shoulder part, 16...
Sliding ring, 17... Engagement step portion, 18... Hydraulic pressure acting part, 19... Hydraulic pressure passage, 22... Sleeve, 2
3...Fixing nut, 24...Elastic ring, 25...
...Press nut.

Claims (1)

[Claims] 1. In a rolling sleeve roll in which a cemented carbide sleeve is fitted and fixed to the roll body, a fixing nut is fitted on one side of the sleeve and a sliding ring is fitted on the other side,
An engaging stepped portion having a smaller diameter on the sleeve side is provided on the inner periphery of the sliding ring, a shoulder portion that engages with the engaging stepped portion is provided on the roll body, and a liquid is formed between the engaging stepped portion and the shoulder portion. A sleeve roll for rolling, characterized in that a hydraulic passage is communicated with the pressure acting part, and the end face of the sliding ring is brought into contact with the inner surface of a flange protruding from the roll body. 2. In a rolling sleeve roll in which a cemented carbide sleeve is fitted and fixed to the roll body, an elastic ring is interposed between a fixing nut fitted on one side of the sleeve and a sliding ring fitted on the other side, An engagement step is provided on the inner periphery of the dynamic ring, and the sleeve side has a smaller diameter, and the roll body is provided with a shoulder that engages with the engagement step, and the hydraulic action created between the engagement step and the shoulder is provided. 1. A sleeve roll for rolling, characterized in that a hydraulic passage is communicated with the sleeve, and a pressing nut is fitted between the surface of the sliding ring opposite to the sleeve side and the flange of the roll body.