JPS6119552A - Equipment for grinding outer surface of outer peripheral roll surface of outer ring of rolling bearing type roll - Google Patents

Abstract

PURPOSE:To obtain highly precise grinding to the outer periphery of the outer ring without dismantling the ring by bringing from ring's outer side both a power tranmission wheel and a pusher roll in contact with the roll outer ring at two points on a semicircle of the ring and bringing a grinding wheel in contact with the outer ring at a point between the said two points in order to grind the outer peripheral surface of the roll outer ring. CONSTITUTION:Both a power transmission wheel 17 and a pusher roll 18 touch with pressure the roll surface 3b of the outer periphery of the roll outer ring 3 at 2 points in a forward side semicircle of the roll surface 3b. The total resultant force D, which consists of the resultant force A and B, produced by the above two touching with pressure the roll outer ring 3 as well as the resultant force C by a grinding wheel 19, acts on a roll shaft 1. As a result, the roll's inner and outer track surfaces 2a, 3d and a rolling body 4 are pushed to each other, thereby making the radial clearance zero. And the grinding is performed in this state. Accordingly, the grinding work becomes equivalent to that in which the center of the roll outer ring 3 is taken as the grinding reference. Thus, the roll outer ring 3 is turned without deflection, under a 4- point support made up of the roll shaft 1, transmission wheel 17, pusher roll 18, and the grinding wheel 19. Therefore, the outer ring 3 can be ground with accuracy to the uniform thickness and grade-of-roundness with respect to the track surface 3a.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a grinding device for grinding the outer IN roll surface of a rolling bearing type roll used, for example, as a leveler roll.

When a conventional rolling bearing type roll is used as a leveler roll, the outer peripheral roll surface of the roll outer ring is roughened by adhesion of scale, rolling oil, etc., abrasion, etc., which leads to a reduction in rolling accuracy. Therefore, it is necessary to frequently perform correction grinding on the outer peripheral roll surface. However, the roll outer ring is
Since rotational force cannot be transmitted from the @ side where the bearing type roll is fitted, when using a commercially available grinder,
Unless a rotating force is applied to the roll outer ring from the outside of the rolling bearing type roll to prevent chipping, etc., it is not possible to grind the outer roll surface of the roll outer ring while the assembled part is still in place. Even if a rotational force is applied to the roll outer ring from the side of the roll outer ring due to chipping or the like to grind the outer roll surface, the outer ring of the roll will run out due to the moment force, and the grinding accuracy will not be stable.

Therefore, originally, this rolling bearing type roll was disassembled into pieces, only the roll outer ring was taken out, and the outer ring was ground as a single unit, thereby ensuring the accuracy of the roll outer ring itself.

In order to take out the roll outer ring and perform grinding, it is necessary to disassemble the bearing type roll one by one, which is extremely time consuming, increases the number of processing steps, and makes disassembly and reassembly troublesome.

Furthermore, disassembly and reassembly can damage the raceway surface of the shaft and outer ring), leading to a decline in quality.

Therefore, a special machine for grinding the outer circumferential roll surface of the outer ring of a bearing-type roll, which is shown in Japanese Patent Application Laid-open No. 52-43195, has been provided as a backing bearing (backup roll) grinding device for Sendzimir rolling mills. . In this system, a backing bearing is placed on two drive rolls arranged in parallel, and the rotation of the saddle leg positioned between both drive rolls is stopped by a brake shoe. As the roll rotates, a grindstone is pressed against the roll's outer peripheral surface from diagonally above to perform grinding.

Problems to be Solved by the Invention In this conventional machine, the height from the bottom surface of one saddle leg to the center of the backup roll is used as the standard for determining the wall thickness of the outer ring of the roll. Abrasion and deformation inside the rolls cause variations in the wall thickness of the outer rings of the rolls between all the rolled up rolls, and a single assembly with a shaft without a saddle cannot be used as a bearing type roll.

In addition, the backup roll is supported from below by two parallel drive rolls and driven to rotate, and grinding is performed by simply pressing the grindstone from diagonally above. This pressing cannot be done by force alone, but the position where the grindstone is pressed cannot be applied. , it is impossible to completely reduce the internal clearance (radial clearance) of a bearing type roll to zero. For this reason, - B) If there is a change in the estimated distance from the center of the backup roll shaft, which is a long object, to each drive roll that supports it, due to moment force or deflection due to the own weight of each drive roll, The roll is not cylindrical.

(b) Since it is difficult to manage the pressing force between the two drive rolls that support the backup roll so that it is uniform, it is difficult to achieve machining accuracy due to the constant changes in the pressing force. -etc.- There are drawbacks.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides support means for supporting a rolling bearing type roll via a shaft into which it is fitted, and a roll surface around the outer ring of the supported rolling bearing type roll. A transmission wheel and a pusher roll that are pressed at two points on a half circumference to urge the outer ring toward the shaft and drive it to rotate, and a grinding wheel that is in contact between the two points on a half circumference of the roll surface to perform grinding. is provided, and the grinding wheel contact point is set on a biasing direction line that passes through the center of the inner circumferential surface of the roll outer ring toward the roll outer ring due to the total combined force of the pressure contact and the contact.

i Grinding equipment usually supports roller bearing type rolls so that their axes are oriented horizontally; It is possible to freely set the support direction and make it variable, such as to prevent the weight of the rolling bearing type roll from affecting the roll. , the shaft used to support rolling bearing type rolls is
It may be the roll shaft itself that is integrally used as a part of the bearing type roll, or it may be an arbor or the like as an auxiliary member that is installed or prepared on one grinding device side. Gaa like this
In the case of a bar, in contrast to a rolling bearing type roll without an inner ring that receives the rolling elements from the inside, a bar is used to reduce the radial clearance between the rolling element and the roll outer ring to the desired extent - the so-called bearing clearance. diameter can be selectively used.

In addition, the rolling bearing type roll to be ground is one in which the outer circumferential roll surface of the roll outer ring is formed by the roll outer ring itself, and is also formed by a metal ring tightly fitted to the outer ring of the roll. Type 1 There are also various types such as those formed by overlaying the outer circle of the roll outer ring.

Operation With the above structure, the supporting means can fit the rolling bearing type roll through the shaft if it has a roll shaft, or to the arbor on the side of the grinding device even if there is no roll shaft used integrally. Through it, it is supported without disassembly. The transmission wheel and the pusher roll are pressed against the roll outer ring of the supported rolling bearing type roll from the outer periphery at two semi-identical points, biased in the axial direction, and driven to rotate between the roll and the shaft. This rotational drive is achieved regardless of whether the rolling bearing roll is supported horizontally, vertically or in any other orientation. The grinding wheel contacts between the two points on the half circumference of the roll surface and grinds the outer peripheral roll surface of the rotatably driven roll outer ring, but this contact also has the effect of urging the roll outer ring toward the shaft side. Ru. The rollers on the biasing direction line passing through the center of the inner peripheral surface of the roll outer ring toward the roll outer ring due to the total combined force of the transmission wheel and the pusher roll O pressure contact and the contact of the grinding wheel are radial The gap is set to zero, and grinding by the grinding wheel is performed on the biasing direction line where the radial gap is zero, with the inner peripheral surface of the roll outer ring, in other words, the center of the inner peripheral surface of the roll outer ring as a reference.

Embodiment A first embodiment shown in FIGS. 1 to 3 will be described. FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is an enlarged side view of main parts showing the grinding state. It is supported on the main body 11 and ground. In the rolling bearing type roll 10, for example, as shown in the figure, the roll inner ring 2 is fixed to a 10-roll shaft 1, or the shaft and the inner ring are integrated, and the inner ring raceway surface 2a and the roll outer ring 3 are connected to each other. A large number of rolling elements 4 such as rollers are installed in a state where a radial clearance necessary for rotation of the bearing is provided between the bearing and the raceway surface 3a.

A center headstock 13 and a tailstock 14 are provided on both ends of the grinding machine body 11, and a slide ped 12 is provided on the main body 1 between the center headstock 13 and the tailstock 14, respectively. The center headstock 13 and the slide bed 12 are slidably mounted on the main body 1, and the tailstock 14 is fixedly mounted on the main body 11. The centers 15 and 16 of the center headstock 13 and tailstock 14 are clamped and engaged from both sides with center holes (not shown) provided on both end surfaces of the shaft 1 of the rolling bearing type roll 10. Support and fix horizontally. As a result, the rolling shaft bearing roll 10 is horizontally supported on the main body 11 without being disassembled.

A transmission wheel 17, a pusher roll 18 and a grinding wheel 19 are attached to the outer peripheral surface of the supported rolling bearing type roll 1o.
is arranged and installed on the main body 11.

The transmission wheel 17 is rotationally driven by a continuously variable speed electric motor 22 via a V-pulley 20% V-belt 21, etc., and is rotated by a fulcrum shaft 23.
It is supported by a bearing 25 on a transmission vehicle bracket 24 that is rotatably attached to the top of the roll surface 3b of the roll outer ring 3. It is pressed against U from above and drives the outer ring 3 to rotate. The fulcrum shaft 23 of the bracket 24 is connected to the continuously variable speed electric motor 22.
The base 26 is mounted on a bearing part 27 of a transmission vehicle base 26, and the transmission vehicle frame 2 is mounted on the slide base 12 via a height adjustment spacer 28.
It is fixed on 9. A push pin 30 is screwed onto the upper end of the transmission wheel base 26, and its tip abuts against the driven surface of the transmission wheel bracket 24, and the bolt 30 is used to adjust the position of the transmission wheel 17 and The pressure contact force is adjusted.

The pusher roll 18 has its shaft portion 31 engaged in a notch 33 of a pusher roll bracket 32 provided on the slide base 12, and is rotatably supported by a single bearing 34 attached to the bracket 32. An elastic member such as rubber covering the outer circumference is pressed against the outer circumferential roll surface 3b from diagonally below the front surface (grindstone side) of the roll outer ring 3 to support the rotationally driven roll outer ring 3. Between the bracket 32 and the bearing 34, the bracket 32
A push bolt 35 is provided which is screwed into the push bolt 35, and the bolt 35 adjusts the pressing force of the pusher roll 18 against the outer circumferential surface 3b of the outer ring and adjusts the position of the roll 18.

The grinding wheel 19 is supported by the grinding machine main body 11 by a mechanism not shown, is rotated by a drive mechanism within the main body 11, and is moved forward and backward toward the workpiece by an operating mechanism (not shown) of the main body 11. I am made to do so.

Here, the transmission wheel 17 and the pusher roll 18 are pressed against two points within the front half circumference of the roll surface 3b outside the roll M3 outside + ■, and the resultant force when they press against the roll outer ring 3 In other words, the rolling bearing type roll 0 is urged toward the roll shaft 1 by the resultant force A consisting of the pressure contact force and rotational force of the transmission wheel 17 and the pressure contact force B of the pusher roll 18. Figure 3) 0 This biasing resultant force also includes the actual grinding upper roll surface 2b @ EF for grinding, and the resultant force O whose component forces are the pressing force and rotational force of the grinding wheel 19 that is in contact with it. It acts as a total force. On the side of the rolling bearing type roll 10 on which the total resultant force acts, the roll outer ring 3 is pressed against the roll inner ring 2 and the roll shaft 1, which are the same body, while pushing the rolling elements 4, and the roll inner and outer ring raceway The surfaces 2a and 3a are pressed against the rolling elements 4 (there is no movable gap between the roll inner ring 2 and the roll shaft 1, but even if there is, the inner ring 2 is simply pressed against the shaft 1 in the same way and does not affect the operation. ) As a result, when the 4 groups of rolling elements are considered as one ring, the roll inner and outer raceway surfaces 2a, 3as
The inner and outer circumferences of the pseudo ring bodies of the four groups of rolling elements are brought into pressure contact with each other on the biasing direction line X due to the total combined force passing through the center of the roll shaft 1 (the center of the inner ring 2 is also the same), and the inner and outer circumferences of the roll inner and outer rings 2,
The radial clearance in the state where the rolling elements 4 are interposed between the rolls 3 and 3 is zero (in this state, the roll inner and outer ring raceway surfaces 2a,
3a, the inner and outer peripheries of the pseudo ring body of the four groups of rolling elements have accuracy according to their roundness, and the center points thereof are aligned on the biasing direction line X. ). The roll surface 3b on the outer periphery of the roll outer ring 3 is ground by a grinding wheel 19 brought into contact with a portion above the biasing direction line x corresponding to the portion of the rolling bearing type roller 10 where the radial clearance is zero. However, the roll outer ring 3 is moved around the center point of the raceway surface 3a on the biasing direction line Since it is rotationally driven without wobbling due to the four-point support, the grinding is performed using the center point of the raceway surface 3a of the roll outer ring 3 as a reference. Therefore, the roll surface 3b of the outer ring 3 has no influence on its surface condition such as roughness, damage, uneven wear, etc.
The raceway surface 3a is ground with high accuracy and uniform wall thickness and roundness.

This invention also includes a case where the contact point of the grinding wheel 19 with the roll outer ring 3 is located close to the biasing direction line X within a range where the effects of the invention are not impaired.

The slide bed 12 is mounted on the grinding machine main body 12 so as to be slidable in the axial direction of the guide part 36 and both centers 15. The rack 38 is engaged with the rack 38. The pinion 37 is fixed on an operating shaft 39 that is rotatably attached to the slide bed 12, and is located outside the slide bed of the operating shaft 39.
A handle 40 is attached to the N-extending end to cause the slide bed 12 to slide. Although not shown, the main shaft assembly 13, which is slidably mounted on the grinding machine main body 1, is slid by, for example, the same drive Ia structure as the slide bed 12.

In addition, FIG. 4 shows another embodiment in which the resultant force A explained in the embodiment of FIG. Outside! i
The contact position with the outer circumferential surface 3b of the outer ring 3 is also moved from the top U of the outer ring outer circumferential surface 3b to the front side of the outer ring 3.

In addition, the transmission wheel 17, the pusher roll 18, and the grinding wheel 1
The arrangement positions of the rollers 9 are not necessarily limited to those in each of the above embodiments. In short, the transmission wheel 17 and the pusher roll 18 are pressed against two points within the half circumference of the roll surface 3b on the outer circumference of the roll outer ring 3. It is sufficient if the roll outer ring 3 can be urged toward the roll shaft 1 side.

However, there must be enough space between them to allow the grinding wheel 19 to come into contact with the roll surface 3b at the portion where the radial gap becomes zero due to the bias.

The roll surface 3b of the rolling bearing type roll 10 is made of a material different from that of the outer ring 3, by tightly fitting a metal ring 41 to the roll outer ring 3 as shown in FIG. However, these roll surfaces 3b can also be ground in the same manner as in each of the above embodiments.

Furthermore, in each of the above embodiments, the bearing roller 10, which is the object to be ground, has rolls 4 and d+1, but even if it does not have a roll shaft, it can be replaced by a grinding machine. It is possible to fit a rolling bearing type roll into an auxiliary arbor or the like, and to support and grind via the arbor in the same manner as in the previous embodiment. Furthermore, even if it is a rolling bearing type roll without a roll inner ring, it is of course possible to support it through the roll shaft weight or arbor and grind it as described above, but as shown in FIG. In particular, when a rolling bearing type roll 52 without a roll inner ring is fitted and supported for grinding, the radial gap between the roll outer ring 3 via the rolling elements 4 can be minimized by selecting the outer diameter of the arbor 51. The grinding accuracy can be further improved.

In the embodiment, the shaft of the rolling bearing type roll is supported at both end faces by the center main shaft and the center of the tailstock, but the invention is not limited to this. For example, it may be fixed with a steady rest, etc. Just support it.

Effects According to the present invention, a rolling bearing type roll is directly supported in a trench, regardless of the presence or absence of a roll shaft, and the roll is moved between the shaft and the transmission wheel from the outer periphery by pressure contact with the pusher roll. Since the outer ring is rotationally driven and correction grinding of the roll surface can be performed, it is possible to omit the man-hours of disassembling and reassembling the upper roller bearing type mouth and the roller for single-roll surface grinding.
It improves economic efficiency by significantly reducing grinding setup and cleaning man-hours as well as machining man-hours, and maintains bearing performance before re-grinding by eliminating dents, damage, etc. that occur during disassembly and assembly, and improves the quality of rolled products. achieve.

In particular, in this invention, grinding of the roll surface is achieved regardless of the supporting posture of the roller bearing type roll, and the grinding process is not affected by the rolling elements of the rolling bearing type roll or the weight of the roll outer ring. Grinding is possible in a vertical position, and the roll outer ring is urged toward the shaft by the total combined force when the transmission wheel, pusher roll, and grinding wheel press and contact the cowhide on the outer roll surface of the roll outer ring. The grinding wheel contacts the roll surface on the biasing direction line passing through the center of the curved surface of the outer ring of the roll, making the radial/L' gap of the rolling bearing type roll zero, and the grinding wheel is in contact with the roll surface, and the axial load transmission wheel, pusher roll, and grinding wheel are Grinding is performed based on the inner periphery or center of the outer ring of the roll without touching the outer ring under four-point support via the rolling elements or the rolling element and the inner ring. In addition, in the embodiment, providing a spacer between the slide bed and the transmission wheel base means that it is easy to adapt to changes in the size of the workpiece. , and the push bolt,
Of course, if it is replaced with a device such as a hydraulic cylinder D, remote control, automatic control, etc. are possible.

[Brief explanation of the drawing]

Fig. 1 is a front view of the embodiment, Fig. 2 is a side view, Fig. 3 is an enlarged view of main parts for explaining the operation, Fig. 4 is Fig. 3 Wako diagram of another embodiment, Fig. 5 , Fig. 6 is a partial sectional view showing another example of a rolling bearing type roll as an object to be ground, and Fig. 7 is a rolling bearing type roll without a shaft or inner ring using an arbor as an auxiliary member on the grinding machine side. FIG. 3 is a partial cross-sectional view showing the case where the 17...Transmission wheel, 18...Pusher roll-19
... Grinding wheel, 41 ... Metal ring, 42 ... Overlay, D ... Total resultant force, X ... Force direction line

Claims (1)

[Scope of Claims] (1) Supporting means for supporting a rolling bearing type roll via a shaft into which it is fitted, and a shaft that is pressed against two points on the half circumference of the outer roll surface of the outer ring of the supported rolling bearing type roll. It is equipped with a transmission wheel and pusher roll that urges and rotates the roll outer ring on the side, and a grinding wheel that is brought into contact between the two points on the half circumference of the roll surface and performs grinding, and the total force of the pressure contact and contact is applied. Apparatus for grinding the outer circumferential surface of a roll on a rolling bearing type roll (2) shaft, characterized in that the grinding wheel contact point is set on a biasing direction line X passing through the center of the inner circumferential surface of the roll outer ring toward the outer ring of the roll. is defined as the roll shaft of the rolling bearing type roll itself.A patent claim in which the shaft of the roller outer ring outer circumference roll surface grinding device (3) of the rolling bearing type roll according to claim 1 is an auxiliary member on the grinding device side. Scope of claim 3, wherein the roller outer ring surface grinding device (4) of a rolling bearing type roll according to claim 1 is fitted inside a group of rolling elements inside the roll outer ring of a rolling bearing type roll. Roll outer ring outer circumference roll surface grinding device (5) of a rolling bearing type roll (5) The roll outer ring outer circumference roll surface of a rolling bearing type roll according to claim 1, wherein the roll outer ring outer circumference roll surface is formed by the roll outer ring itself. Grinding device (6) Grinding the outer periphery of the roll outer ring of a rolling bearing type roll according to claim 1, wherein the roll outer ring outer cylinder roll surface is formed by a metal ring tightly fitted to the outer periphery of the roll outer ring. Apparatus (7) A device for grinding the outer circumferential surface of a roller outer ring of a rolling bearing type roll according to claim 1, wherein the outer circumferential roll surface of the roll outer ring is formed by building up the outer circumference of the roll outer ring.