JP2016124013A - Taper sleeve of rolling roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a taper sleeve capable of fixing a rolling ring by sufficient fixation force even if a sleeve body is thickened.SOLUTION: A taper sleeve comprises a sleeve body 1 forming a cylindrical shape with the axis O as the center, and the inner periphery of this sleeve body 1 is formed with a taper surface 2 of gradually diametrically reducing toward the other end side 1b from one end part 1a in the axis O direction of the sleeve body 1, and the outer periphery of the sleeve body 1 is provided with an installation surface 3 for installing a rolling ring, and a groove part 11 extending toward the axis O extending direction is formed in a range of providing the installation surface 3 in the axis O direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a taper sleeve of a rolling roll that is taper-fitted to a taper shaft of a rolling mill and to which a rolling ring is attached.

  To attach a rolling ring made of a hard material such as cemented carbide with excellent wear resistance to the taper shaft of a rolling mill, a cylindrical sleeve body centering on an axis made of steel material having a lower hardness than the rolling ring is used. A taper sleeve is used that has a tapered surface that is taper-fitted with the taper shaft on the inner periphery, and a mounting surface on which the rolling ring is attached on the outer periphery. Such a tapered sleeve is slightly expanded in diameter by taper fitting within a range in which the rolling ring is not damaged by the circumferential stress and the rolling ring is not slipped by the rolling torque, thereby fixing the rolling ring.

  However, such a tapered sleeve has a tapered surface on the inner periphery of the sleeve body, so that the thickness in the radial direction differs between the side with the larger inner diameter and the side with the smaller inner diameter. The amount of bulge of the outer diameter is also different. And in connection with this, the stress distribution to the inner periphery of the rolling ring is non-uniform, and breakage easily occurs.

  Therefore, in Patent Documents 1 and 2, in order to prevent the cracking of the rolling ring due to such uneven stress distribution, a tapered surface is formed on the inner periphery of the rolling ring and the outer periphery of the tapered sleeve, and the sleeve body is thickened. The meat is proposed. When the sleeve body is made thicker in this way, a rolling ring made of a relatively hard metal such as a cemented carbide is relatively thinned, so that an advantage of being economical can be obtained.

Japanese Patent Laid-Open No. 2004-050215 JP 2004-050216 A

  However, since the increase in the thickness of the sleeve body causes an increase in rigidity at the same time, the amount of swelling of the mounting surface decreases, and a sufficient fixing force of the rolling ring cannot be secured, causing slip. There is a fear. As a result, wear occurs on the mounting surface of the sleeve body and the inner circumference of the rolling ring, and slipping is more likely to occur, and the accuracy of the rolled product is reduced.

  The present invention has been made under such a background, and an object of the present invention is to provide a tapered sleeve capable of fixing a rolling ring with a sufficient fixing force even when the sleeve body is thickened.

  In order to solve the above-described problems and achieve such an object, the present invention includes a sleeve body having a cylindrical shape centering on an axis, and the inner periphery of the sleeve body has an axial direction of the sleeve body. A taper surface that is gradually reduced in diameter from one end portion to the other end portion is formed, and an attachment surface to which a rolling ring is attached is provided on the outer periphery of the sleeve body, and the attachment surface is provided in the axial direction. In the provided range, a groove portion extending in a direction in which the axis extends is formed.

  In the tapered sleeve configured as described above, a groove portion extending in the direction in which the axis of the sleeve main body extends is formed in a range in which the mounting surface to which the rolling ring is attached is provided. When the groove portion is attached to the taper shaft, the groove portion is greatly elastically deformed, and the amount of swelling can be increased. For this reason, even if the sleeve body is thickened, the rolling ring can be fixed with a sufficient fixing force, the rolling ring can be prevented from slipping, and the accuracy of the rolled product can be maintained.

  Here, the groove portion may be a slit-like one penetrating the sleeve main body on the inner or outer periphery, or may be a bottomed groove recessed from the inner periphery or the outer periphery of the sleeve body. In addition, the shape of the cross section perpendicular to the above-mentioned axis also has a constant groove width in the case of a slit shape, gradually widens from the inner periphery to the outer periphery, and conversely, gradually increases from the inner periphery to the outer periphery. It may be narrow, and even in the case of a bottomed groove, it may be U-shaped, semicircular, rectangular, isosceles trapezoidal, or V-shaped.

  As described above, according to the present invention, the mounting surface of the sleeve body can be elastically deformed to increase the amount of swelling, thereby fixing the rolling ring with a sufficient fixing force, and generating slip. It can prevent and ensure the accuracy of the rolled product.

It is a partially broken side view showing the 1st embodiment of the present invention (however, for explanation, a groove part is shown in both the upper part seen from the side and the lower part showing a section). It is (a) sectional drawing orthogonal to the axis line in the range in which the attachment surface of 1st Embodiment was provided, (b) It is an expanded sectional view of a groove part. It is a sectional side view which shows the rolling roll which attached 1st Embodiment. It is sectional drawing orthogonal to the axis line in the range in which the attachment surface which shows the modification of 1st Embodiment was provided. It is a partially broken side view which shows the 2nd Embodiment of this invention (However, the groove part is shown by both the upper part seen from the side, and the lower part which shows a cross section for description.). It is (a) sectional drawing orthogonal to the axis line in the range in which the attachment surface of 2nd Embodiment was provided, (b) It is an expanded sectional view of a groove part. It is sectional drawing orthogonal to the axis line in the range in which the attachment surface which shows the modification of 2nd Embodiment was provided. It is an expanded sectional view of a slot which intersects perpendicularly with an axis in the range in which (a)-(g) attachment surfaces showing other modifications of a 2nd embodiment were provided.

  FIG. 1 and FIG. 2 show a first embodiment of the present invention, and FIG. 3 shows a rolling roll to which a tapered sleeve of this first embodiment is attached. In this embodiment, the sleeve body 1 is integrally formed of an elastically deformable metal material such as a steel material and has a cylindrical shape centering on the axis O, and has an inner end on one end in the direction of the axis O (in FIG. 1). A taper surface 2 that gradually decreases in diameter from the right end 1a to the other end (the left end in FIG. 1) 1b is formed, and an attachment surface 3 is provided on the outer periphery of the sleeve body 1. Yes.

  The tapered surface 2 forms a concave conical surface centering on an axis O formed so as to be reduced in diameter with a certain taper as it goes from the one end 1a to the other end 1b over the entire length of the sleeve body 1. . The mounting surface 3 has a cylindrical surface centered on the axis O having a constant outer diameter. Therefore, the radial thickness relative to the axis O of the sleeve main body 1 between the tapered surface 2 and the mounting surface 3. Increases gradually from the one end 1a toward the other end 1b. An annular flange portion 4 having a one-step outer diameter larger than that of the mounting surface 3 is formed on the outer peripheral portion of the other end portion 1 b of the sleeve body 1.

  As shown in FIG. 3, the taper sleeve is coaxially mounted by taper fitting the taper surface 2 to the taper shaft 5 of the rolling mill, and the mounting surface 3 is a sleeve made of cemented carbide or the like. An annular or cylindrical rolling ring 6 having a hardness higher than that of the main body 1 is also attached coaxially to constitute a rolling roll. A groove-shaped caliber portion 7 is formed on the outer peripheral surface of the rolling ring 6 so as to go around the outer peripheral surface. Usually, a pair of rolling rolls configured as described above is a caliber of each rolling ring 6. It arrange | positions so that the part 7 may be made to oppose, and the axis line O may become parallel, and a steel bar material etc. are passed between these caliber parts 7, and it rolls.

  In the range where the mounting surface 3 is provided in the axis O direction of the sleeve body 1, a groove portion 11 extending in the direction in which the axis O extends is formed. The groove portion 11 in this embodiment is the sleeve portion 1. Is formed in a slit shape penetrating the inner and outer peripheries. That is, in the present embodiment, the groove portion 11 has two wall surfaces 11a that are parallel to the plane P including the axis O and are opposed to each other at equal intervals from the plane P as shown in FIG. These wall surfaces 11a intersect the tapered surface 2 on the inner periphery of the sleeve body 1 and the mounting surface 3 on the outer periphery.

  Further, the groove portion 11 opens in the one end portion 1a of the sleeve body 1 in the direction of the axis O and extends to the other end portion 1b side in parallel with the axis O, and before the flange portion 4 on the other end portion 1b side. 1 and has a groove end surface 11b having a semi-cylindrical surface shape recessed in the other end 1b as shown in FIG. 1 in a side view, which is continuous with the two wall surfaces 11a and intersects the tapered surface 2 and the mounting surface 3. doing. In the first embodiment, only one such groove portion 11 is formed as shown in FIG. However, in FIG. 1, the groove part 11 is shown in both the upper part seen from the side and the lower part showing a cross section for the sake of explanation.

  In such a taper sleeve, when the taper surface 2 of the sleeve body 1 is taper-fitted to the taper shaft 5 of the rolling mill, the sleeve body 1 expands in the same manner as a conventional taper sleeve in which the groove portion 11 is not formed. In addition to the elastic deformation in the radial direction as described above, the elastic deformation is also performed so that the interval between the two wall surfaces 11a of the groove portion 11 is widened. For this reason, the amount of swelling of the attachment surface 3 can be increased, and the rolling ring 6 can be attached to the tapered shaft 5 with a sufficient fixing force even when the sleeve body 1 is thickened.

  Therefore, according to the tapered sleeve having the above-described configuration, the rolling ring 6 can be prevented from slipping during rolling, and the wear of the rolling ring 6 and the sleeve body 1 due to such slip can be prevented and the life can be extended. It becomes possible to maintain the rolling accuracy of the steel bar as a rolled product. Moreover, since sufficient fixing force can be obtained even if the sleeve body 1 is thickened in this way, the rolling ring 6 made of an expensive hard material such as cemented carbide can be thinned, and the cost can be reduced. A rolling roll can also be provided.

  In the present embodiment, only one groove portion 11 is formed in the range where the mounting surface 3 of the sleeve body 1 is provided. However, as in the modification of the first embodiment shown in the sectional view of FIG. In addition, two or more (two in FIG. 4) grooves 11 may be formed. However, when a plurality of grooves 11 are formed in this way, it is desirable that these grooves 11 are formed at equal intervals in the circumferential direction as shown in FIG.

  In the first embodiment and its modification, the two wall surfaces 11a of the groove 11 are formed in parallel to the plane P including the axis O, that is, in parallel with each other. Even if the two wall surfaces 11a are inclined so that the circumferential width of 11 gradually becomes wider, or conversely, the circumferential width of the groove 11 gradually becomes narrower from the inner circumference toward the outer circumference. Good.

  Next, FIG. 5 and FIG. 6 show a second embodiment of the present invention, and the same reference numerals are assigned to parts common to the first embodiment, and the description is simplified. In the first embodiment, the groove portion 11 has a slit shape penetrating the inner and outer peripheries of the sleeve body 1, whereas in this second embodiment, the groove portion 21 extends from the mounting surface 3 on the outer periphery of the sleeve body 1. It is a bottomed groove recessed in the circumferential side, It is characterized by the above-mentioned.

  That is, the groove portion 21 in the second embodiment includes, as shown in FIG. 6, two wall surfaces 21a that are parallel to the plane P including the axis O and are opposed to each other at an equal interval from the plane P. It is formed in a U-shaped section having a semicircular bottom surface 21 b that is continuous with the inner peripheral side of the wall surface 21 a and is recessed toward the inner peripheral side. Such a groove portion 21 is also opened to one end portion 1a of the sleeve body 1 and extends to the other end portion 1b side in parallel with the axis O in a range where the mounting surface 3 of the sleeve body 1 is provided. In front of the flange portion 4 on the side, the groove end surface 21c having a semi-cylindrical surface recessed toward the other end portion 1b side is completed.

  Further, the groove depth from the mounting surface 3 to the bottom surface 21b of the groove portion 21 is constant, and therefore the bottom surface 21b extends in parallel to the axis O as shown in the lower side of FIG. Yes. Also in the second embodiment, only one such groove portion 21 is formed as shown in FIG. 6 (a). However, in FIG. 5, for the sake of explanation, an upper portion viewed from the side and a lower portion showing a cross section are shown. The groove portion 21 is shown on both sides.

  Also in the tapered sleeve of the second embodiment, when the tapered surface 2 on the inner periphery of the sleeve body 1 is taper-fitted to the tapered shaft 5 of the rolling mill, the interval between the wall surfaces 21a is reduced at the portion where the groove portion 21 is formed. The sleeve body 1 is easily elastically deformed so as to spread, and accordingly, the amount of swelling of the outer mounting surface 3 is increased, and the rolling ring 6 can be fixed with a sufficient fixing force. Therefore, even if the sleeve body 1 is thickened, the rolling ring 6 can be prevented from slipping and the rolling accuracy can be maintained.

  In the second embodiment, only one groove portion 21 is formed, but like the modification of the first embodiment, like the modification of the second embodiment shown in FIG. A plurality of (two in FIG. 7) groove portions 21 may be preferably formed at equal intervals in the circumferential direction. In the second embodiment, the groove depth from the mounting surface 3 to the bottom surface 21b of the groove portion 21 is constant as described above, and the bottom surface 21b is on the lower side of FIG. As shown, it extends parallel to the axis O. For example, the groove 21 extends from one end 1a of the sleeve body 1 toward the other end 1b so that the bottom surface 21b extends parallel to the inclination formed by the tapered surface 2 in the same cross section. The groove depth may be gradually increased.

  On the other hand, in the second embodiment, the groove portion 21 has a U-shaped cross section as described above in a cross section orthogonal to the axis O, but the same cross section as in, for example, another modification shown in FIG. 8 may be a semicircular groove portion 22 having a center on the plane P including the axis O, and parallel to the plane P as in another modification shown in FIG. It may be a groove 23 having a square cross section having two wall surfaces 23a facing each other at equal intervals from each other and a bottom surface 23b orthogonal to the plane P. Further, as in another modification shown in FIG. 8C, a cross-section isosceles base having two wall surfaces 24a that are gradually separated toward the outer peripheral side symmetrically with respect to the plane P, and a bottom surface 24b that is orthogonal to the plane P. It may be a groove portion 24 having a shape, or a groove portion having a V-shaped cross section composed of two such wall surfaces 24a although not shown.

  Furthermore, in the second embodiment, the groove portion 21 is formed as a bottomed groove having a U-shaped cross section that is recessed from the mounting surface 3 on the outer periphery of the sleeve body 1 to the inner peripheral side. For example, FIG. Even if it is a bottomed groove having a U-shaped cross section that is recessed outward from the tapered surface 2 of the inner periphery of the sleeve body 1 so that the cross section shown in FIG. Good. Similarly, the cross section shown in FIGS. 8A to 8C is inverted inside and outside, and the semicircular cross section and the square cross section are the same as other modified examples shown in FIGS. 8E to 8G. Or you may form so that the groove parts 22-24 of a trapezoid shape, such as a cross section, may be dented from the taper surface 2 to the outer peripheral side. 8 (d) to 8 (g), the same reference numerals are given to the portions which are symmetrical with respect to the grooves 21 to 24 shown in FIGS. 6 (b) and 8 (a) to 8 (c). Is arranged.

  Further, as shown in FIGS. 8D to 8G, even when the groove portions 21 to 24 are formed as bottomed grooves recessed from the tapered surface 2 on the inner periphery of the sleeve body 1 to the outer peripheral side, the tapered surface 2 The bottom surfaces 21b, 23b, 24b, etc. of the groove portions 21 to 24 may extend in parallel with the inclination formed by the tapered surface 2 in the cross section including the axis O, or the bottom surfaces thereof. The groove depth from the tapered surface 2 of the groove portions 21 to 24 gradually increases from one end portion 1a to the other end portion 1b of the sleeve body 1 so that 21b, 23b, 24b, etc. extend parallel to the axis O in the same cross section. It may be formed as follows.

  Furthermore, in the first and second embodiments, the grooves 11 and 21 extend in parallel to the axis O, but if the axis O extends in the extending direction, for example, it is formed in a spiral shape that twists around the axis O. May be. Further, as shown in FIGS. 1 and 5, the grooves 11, 21 to 24 may be formed within the range in which the mounting surface 3 is provided in the direction of the axis O of the sleeve body 1. It does not have to extend over the entire length of the surface 3.

  Next, the effects of the present invention will be described with reference to examples of the present invention. In this example, a taper sleeve in which only one slit-like groove portion 11 penetrating the sleeve main body 1 on the inner and outer circumferences is formed based on the first embodiment shown in FIGS. 1 and 2, and shown in FIG. Further, based on a modification of the first embodiment, a taper sleeve in which two similar slit-shaped grooves 11 are formed at equal intervals in the circumferential direction, and an inner peripheral side from the mounting surface 3 shown in FIGS. A tapered sleeve having only one groove portion 21 which is a bottomed groove having a U-shaped cross section that is recessed in the groove, and further on the inner peripheral side from the mounting surface 3 in the modification of the second embodiment shown in FIG. A tapered sleeve was produced in which two concave groove portions 22 having a semicircular cross section were formed at equal intervals in the circumferential direction. Let these be Examples 1-4.

  In Examples 1 to 4, the material of the sleeve body 1 is SCM440, the total length in the direction of the axis O is 100 mm, the total length of the mounting surface 3 is 80 mm, the outer diameter of the mounting surface 3 is 107 mm, and the tapered surface 2 is 1 The average inner diameter, that is, the average of the maximum inner diameter and the minimum inner diameter of the tapered surface 2 was 77 mm, and therefore the average thickness between the tapered surface 2 and the mounting surface 3 was 15 mm. . Further, the grooves 11, 21, and 22 were formed with a length of 70 mm in parallel to the axis O from one end 1a of the sleeve body 1 to the other end 1b.

  Furthermore, in Embodiments 1 to 3, the width between the two wall surfaces 11a and 21a facing each other of the groove portions 11 and 21 or the opening width in the circumferential direction of the mounting surface 3 of the groove portion 22 having a semicircular cross section in the embodiment 4 Therefore, the radius of the semicircle formed by the bottom surface 21b of the groove 21 having the U-shaped section in Example 3 and the radius of the semicircle formed by the cross section of the groove 22 in Example 4 are 2.5 mm. Moreover, the depth from the mounting surface 3 of the groove part 21 in Example 3 was constant at 7.5 mm, and the depth of the groove part 22 in Example 4 was also constant at 2.5 mm.

  Furthermore, as a comparative example with respect to Examples 1 to 4, a taper sleeve having the same material, outer shape, and dimensions as those of Examples 1 to 4 and having no groove was manufactured. In Examples 1 to 4 and the comparative example, the tapered surface 2 is taper-fitted to the taper shaft 5 to give tightening allowances of 0.020 mm and 0.050 mm in the diameter direction with respect to the axis O. The amount of swelling of the surface 3 in the diameter direction was measured. The amount of swelling at this time is shown in Table 1 when the tightening margin is 0.020 mm, and Table 2 when the tightening margin is 0.050 mm.

  From the results of Table 1 and Table 2, in Examples 1 to 4 in which the groove portions 11, 21, and 22 were formed, the tightening margins were 0.020 mm and 0.050 mm as compared with the comparative example in which the groove portions were not formed. In any case, it can be seen that a large amount of swelling is obtained. In addition, when Examples 1 and 2 in which the slit-like groove 11 is formed are compared with Examples 3 and 4 in which the groove portions 21 and 22 that are bottomed grooves are formed, Examples in which the slit-like groove 11 is formed. The amount of swelling is larger in 1 and 2. Furthermore, when comparing the first and second embodiments in which the slit-shaped groove portion 11 having the same width is formed, the bulge amount is larger in the second embodiment example 2 than in the first embodiment example in which the groove portion 11 is one. ing.

DESCRIPTION OF SYMBOLS 1 Sleeve main body 1a One end part of sleeve main body 1b Other end part of sleeve main body 1 2 Tapered surface 3 Mounting surface 4 Flange part 5 Tapered shaft 6 Rolling ring 7 Caliber part 11, 21-24 Groove part 11a, 21a, 23a, 24a Groove part 11, 21, 23, 24 wall surfaces 21 b, 23 b, 24 b bottom surfaces of the groove portions 21, 23, 24 O axis of the sleeve body 1

Claims (3)

  A sleeve body having a cylindrical shape centering on the axis is provided, and a tapered surface is formed on the inner periphery of the sleeve body, the diameter of which is gradually reduced from one end of the sleeve body toward the other end. An outer surface of the sleeve body is provided with an attachment surface to which a rolling ring is attached, and a groove portion extending in a direction in which the axial line extends is formed in a range in which the attachment surface is provided in the axial direction. A tapered sleeve of a rolling roll.   The taper sleeve of a rolling roll according to claim 1, wherein the groove has a slit shape penetrating the sleeve main body on the inner and outer periphery.   2. The taper sleeve of a rolling roll according to claim 1, wherein the groove is a bottomed groove that is recessed from an inner periphery or an outer periphery of the sleeve body.

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