JP6338241B2 - Rolling roll fixing device - Google Patents

Description

  The present invention relates to a fixing device for fixing a rolling roll to a cantilever roll shaft.

  For example, Japanese Patent Laid-Open No. 9-314207 discloses a rolling roll fixing device (hereinafter referred to as “conventional example 1”). Conventional Example 1 is to move the roll to a predetermined position by pressing the rolling roll in the direction of the mill stand when fixing the ring-shaped rolling roll to the roll shaft supported by the cantilever mill stand via the taper sleeve. In addition, the taper sleeve is pressed in the direction of the rolling roll to fix the rolling roll. The fixing device includes a fixing bolt mounting bracket screwed into an end surface of a roll shaft in the taper sleeve, a roll pressing sleeve externally mounted on the taper sleeve, and a ring that presses the taper sleeve in the direction of the rolling roll. Each of which has a hydraulic jack having a cylindrical pressing piston. A ring-shaped cylinder is recessed in the roll pressing sleeve side of the hydraulic jack, and a pressing piston that presses the end surface of the tapered sleeve is fitted into the cylinder. The hydraulic jack is always connected to the roll pressing sleeve through male and female screws. A fixing bolt is attached to the leading end side of the roll shaft, and the hydraulic jack is fixed to the leading end side of the roll shaft by the fixing bolt. The hydraulic jack is connected to the fixing bolt mounting bracket.

  A method of fixing the rolling roll to the roll shaft using the fixing device is as follows.

  First, the rolling roll is fitted on the taper sleeve, and the taper sleeve is fitted on the roll mounting shaft portion of the roll shaft. Then, the roll pressing sleeve is externally fitted and pushed into the taper sleeve, and the fixing bolt is inserted into the bolt hole of the hydraulic jack and screwed into the fixing bolt mounting bracket fixed to the roll shaft. Mounted. Next, when the fixing bolt is tightened by pressing the rotation of the hydraulic jack, the roll pressing sleeve moves in the direction of the rolling roll together with the hydraulic jack, and the rolling roll is pressed in the direction of the mill stand by the pressing force of the roll pressing sleeve. . After that, when hydraulic oil is supplied into the hydraulic chamber of the hydraulic jack, the pressure piston is pushed in the direction of the taper sleeve by the hydraulic pressure of the hydraulic oil, and the taper sleeve is moved from the roll mounting shaft portion of the roll shaft by the pressure of the pressure piston. The rolling roll is pushed into the sleeve fitting hole, and as a result, the rolling roll is firmly fixed to the roll shaft.

  The conventional example 1 is a problem of a rolling roll fixing device (hereinafter referred to as “conventional example 2”) according to Japanese Patent Application Laid-Open No. 7-323308 described in the second column, first column, paragraph 0002, that is, a hydraulic jack. This structure is proposed in order to solve the problem that the structure is complicated, the number of parts is large, and an imbalance of the pressing force is generated (see the above publication, page 2, column 2, paragraph 0008).

  In order to fix the rolling roll to the roll shaft, a so-called hydraulic system is adopted in Conventional Example 1, but it is described in the published specification and drawings related to Japanese Utility Model Publication No. 6-61302 as a screw system. And a cantilever roll assembly described in JP 2000-61510 A (hereinafter referred to as “Conventional Example 3” and “Conventional Example 4”, respectively) have been proposed.

  For example, Conventional Example 3 includes a roll shaft that is pivotally supported by a cantilever mill stand, a taper sleeve that is interposed between the roll shaft and the ring roll, and a fixing nut that is screwed into the roll shaft end thread portion. A rolling roll fixing device comprising: a nut engaging circumferential groove at a roll shaft end side end of a taper sleeve; a ring-shaped engaging protrusion at a ring roll side end of a fixing nut; The protrusions are inserted and engaged in a mutually rotatable manner, the taper sleeve can be moved in the axial direction by rotation of the fixing nut, and the taper sleeve is pushed or extracted between the roll shaft and the ring roll (“Structure” on page 1 of the publication) Section). When attaching the ring roll to the roll shaft in the rolling roll fixing device, the ring roll is fitted to the taper sleeve, the taper sleeve is fitted to the ring roll attachment portion of the roll shaft, and the fixing nut is attached to the thread portion of the roll shaft. After screwing, the rotary shaft of the rotary actuator is fitted into the fitting hole of the roll shaft, the key is engaged with the engaging groove, and the engaging pin is engaged with the engaging hole. Next, when the rotary actuator is operated to rotate the rotating shaft in the forward direction, the fixing nut is screwed in the direction of the arrow in FIG. 1, and the taper sleeve is inserted between the ring roll and the roll shaft without rotating, and the taper effect As a result, the ring roll is firmly fixed to the ring roll mounting portion of the roll shaft (see the published specification, page 8, paragraphs 0017 and 0018).

JP-A-9-314207 JP 7-323308 A Japanese Utility Model Publication No. 6-61302 JP 2000-61510 A

  In Conventional Example 1 which solved the problem of Conventional Example 2, it is necessary to tighten the fixing bolt while holding down the rotation of the hydraulic jack. In other words, while supporting the hydraulic jack on the one hand, the fixing bolt on the other hand is required. The tightening work is necessary, and since the high oil pressure is used, the weight of the fixing device is heavy and the roll shaft is inclined in many cases, so that the burden on the operator in attaching and detaching the fixing device is large.

  In Conventional Example 3, since the fixing by pushing the ring roll, which is a rolling roll, with respect to the roll shaft is a screw method (by the tightening force of the screw), the attaching / detaching work is troublesome, and the rotary which is a rotary tool is used. Due to the rotation of the actuator, there remains a problem that the pushing force is insufficient. Although the description of the structure of Conventional Example 4 is omitted, there is a problem similar to that of Conventional Example 3.

  An object of the present invention is to facilitate the attaching / detaching operation of the fixing device, to reduce the burden of the attaching / detaching operation by the operator, and to firmly fix the rolling roll to the roll shaft.

A rolling roll fixing device according to the present invention is a fixing device that fixes a hollow rolling roll to a roll shaft that is cantilevered by a rolling mill via a taper sleeve that is fitted to the roll shaft. and a drive side of the rolling rolls opposite directions from is provided with a piston can be pressurized to the tapered sleeve cylinder, cylindrical spring cover is connected to the cylinder, and a spring is provided on the spring in the cover The cylinder has an accommodation hole for accommodating the piston so as to be movable in the axial direction, and the spring is disposed between the piston and a spring cover and returns to the piston. state and imparts a spring force in a direction, the cylinder, which is configured to be screwed into the tip of the roll shaft, the cylinder is screwed to the tip of the roll shaft The spring cover end surface is an end of the rolling roll side of the spring cover is formed so as to press the end surface of the rolling roll.

  In order to reduce the weight of the apparatus main body and ensure the strength, it is desirable that both the piston and the spring cover are made of a light alloy such as aluminum or titanium.

  From the viewpoint of preventing damage to the main body of the apparatus, a step for hydraulic leakage is formed on the inner peripheral surface of the opening end on the rolling roll side of the storage hole of the cylinder so as to limit the stroke of the piston during pressurization. desirable.

  When the hydraulic pressure is released, it is difficult to remove the cylinder unless the piston returns to the original position. Therefore, it is desirable that one end of the spring is hooked on the end of the spring cover on the rolling roll side, and the other end is hooked on the piston.

  According to the present invention, the work of supporting the fixing device by the worker during the fixing work as in the conventional example 1 becomes unnecessary, so that the burden on the operator's work can be reduced and the workability of the fixing is improved. Further, since the rolling roll can be fixed by using one system of hydraulic pressure, it is possible to eliminate complicated hydraulic operation and increase in weight. In addition, according to the present invention, the fixing workability is easier than in the conventional examples 3 and 4, and the fixing can be performed firmly because of the oil pressure.

It is sectional drawing which shows the use condition of the fixing device of the rolling roll which concerns on this invention. It is sectional drawing which shows the state before attaching the fixing device of the rolling roll which concerns on this invention to a roll axis | shaft. It is a side view which shows the fixing device of the rolling roll which concerns on this invention. It is a top view which shows the fixing device of the rolling roll which concerns on this invention.

  An embodiment of a rolling roll fixing device according to the present invention will be described with reference to the drawings.

  1 and 2, a rolling roll fixing device 1 includes a roll sleeve S that is cantilevered on a rolling mill M via a taper sleeve T that is fitted to a roll shaft attachment portion Sa of the roll shaft. The hollow rolling roll R is fixed. An end portion (right end portion in FIG. 2) of the roll shaft attachment portion Sa on the fixing device 1 side is a roll shaft screw portion Sa1 in which a male screw is formed on the outer peripheral surface.

  The rolling roll fixing device 1 includes a cylinder 2 provided with a piston 3, a cylindrical spring cover 4 connected to the cylinder, and a spring 5 provided in the spring cover.

  The cylinder 2 shown in FIGS. 1 to 3 is made of alloy steel, and has a screw hole 2a formed in a shaft portion in a penetrating state in the shaft center direction. The inner peripheral surface of the screw hole 2a is formed with a female screw.

  As shown in FIGS. 2 to 4, a pair of handle portions 6 are arranged on the outer surface of the cylinder 2 (the surface opposite to the rolling roll R side) on the left and right of FIG. is there. Both sides of each handle portion 6 are a handle 6a and a mounting frame 6b, and each mounting frame on the screw hole 2a side is fixed to the outer surface of the cylinder 2 by bolts 6c. The cylinder 2 can be rotated around the screw hole 2a in a state where the handle 6a of each handle portion 6 is grasped.

  The piston 3 is made of, for example, a light alloy such as aluminum or titanium, and its main body is housed in a housing hole 2b formed in the cylinder 2 so as to be movable in the axial direction. An end surface of the piston 3 on the taper sleeve T side (left side in FIG. 2) is a pressurizing end surface 3a.

  Further, as shown in FIGS. 1 and 2, a hydraulic leakage step 2b1 is formed on the entire circumference, with the inner peripheral surface of the opening end on the rolling roll R side (left side in FIG. 1) of the storage hole 2b of the cylinder 2 being thinned. . The hydraulic leakage step 2b1 plays a role of preventing the fixing device 1 from being damaged by leaking (leaking) the hydraulic pressure when the piston 3 moves forward to the rolling roll R side during pressurization and has a predetermined stroke or more. Is.

  The spring cover 4 is made of a light alloy such as aluminum or titanium.

  In the example shown in FIGS. 1 and 2, the spring 5 is a coil spring. The spring 5 is disposed in the spring cover 4 and applies a spring force in a direction returning to the piston 3. One end portion (left end portion in FIG. 1) of the spring 5 is hooked to the end portion (left end portion) of the spring cover 4 on the rolling roll R side, and the other end portion (right end portion) is hooked to the piston 3. Thus, the spring 5 is disposed between the spring cover 4 and the piston 3 and applies a spring force to both the piston and the spring cover. The spring cover end face 4a, which is the end face of the spring cover 4 on the rolling roll R side, is in contact with the end face of the rolling roll R and can be pressed.

  Specifically, the piston 3 has a pressure end surface 3a that presses against the taper sleeve T, and a notch end surface (not numbered) provided with a step from the pressure end surface. The spring cover 4 has a spring cover protrusion 4b whose end on the rolling roll R side protrudes inward. The notch end face and one end face of the spring cover projection are in positions facing each other. The spring 4 is provided at a position where both ends of the spring 4 come into contact with the notch end face and the spring cover protrusion 4b. With this configuration, since the spring is arranged perpendicularly to the piston and the taper sleeve, the elastic force of the spring is transmitted to the piston when the hydraulic pressure is released. The spring cover 4 and the cylinder 2 may be either joined by screws or integrally molded.

  As shown in FIGS. 1 and 3, the cylinder 2 is provided with a fixing hydraulic port 2 c for supplying hydraulic oil and fixing the taper sleeve T. The hydraulic fluid supplied from the fixing hydraulic port 2c is supplied to the hydraulic chamber and stored. The piston 3 is advanced or retracted by the hydraulic pressure of the hydraulic oil.

  The relationship among the cylinder 2, the piston 3, the spring cover 4, the roll shaft S, and the taper sleeve T will be described with reference to FIG.

  The roll shaft threaded portion Sa1 of the roll shaft S can pass through the piston 3 and be screwed into the screw hole 2a of the cylinder 2. The taper sleeve T can be inserted into the spring cover 4 and can be detached. The pressurizing end surface 3a of the piston 3 can press the end surface Ta of the taper sleeve T toward the rolling roll R side.

  With reference to FIG.1 and FIG.2, the usage method of the fixing device 1 of the rolling roll which concerns on this invention is demonstrated. As shown in FIG. 2, the roll shaft mounting portion Sa of the roll shaft S is pushed into the taper sleeve T in advance, and then the rolling roll R is fitted to the taper sleeve as shown by a chain line.

  First, the handle device 6 of the fixing device 1 is held and the fixing device is moved in the arrow direction in FIG. 2 with the roll shaft screw portion Sa1 of the roll shaft S and the screw hole 2a of the cylinder 2 facing each other. After the opening end and the end surface of the roll shaft screw portion are brought into contact with each other, the fixing device is screwed into the roll shaft screw portion while rotating around the screw hole while gripping the handle 6a of the handle portion. Then, the spring cover end surface 4a of the spring cover 4 is pushed in while being in contact with the end surface of the rolling roll R, and eventually the rolling roll is moved to a predetermined position to hold the position, so that the rotation operation of the fixing device 1 is stopped at the holding stage. . At this time, the cylinder 2 is attached in a state of being fastened to the roll shaft screw portion Sa1 through the screw hole 2a. In this state, the piston 3 and the taper sleeve T are not in contact with each other due to the reaction force of the spring 5.

  Thereafter, when hydraulic fluid is supplied into the hydraulic chamber from the fixing hydraulic port 2c, the piston 3 moves forward to the rolling roll R side (the left side in FIG. 1) against the spring force of the spring 5 by the hydraulic pressure of the hydraulic fluid, and the applied pressure is increased. As a result, the pressure end surface 3a of the piston eventually comes into contact with the end surface Ta of the taper sleeve, and further, the rolling roll R is gradually pushed in from the direction opposite to the drive side to fix the position of the taper sleeve. When the taper sleeve T is pushed by the piston 3, the integration with the rolling roll R is strengthened.

  In this way, the spring cover 4 primarily holds the rolling roll R through the spring cover end surface 4a by the pushing force accompanying the rotational operation of the fixing device 1 and secondarily fixes the rolling roll R by the pressure of the piston 3. . At the same time as the fixing of the rolling roll R, the taper sleeve T is also pressed by the pressing end surface 3a of the piston 3, and is fixed together with the rolling roll.

  If the piston stroke exceeds the set value when the piston 3 is pressurized, the pressure surface side of the piston will reach the hydraulic leakage step 2b1, so that the hydraulic pressure is leaked and the stroke is limited and fixed. Damage to the device 1 is prevented.

  In the unlocking operation of the fixing device 1, first, the pressurization of the piston 3 against the taper sleeve T is released, and the fixing device 1 is moved backward. By this release, the pressing of the taper sleeve T to the rolling roll R is released, and the holding and fixing are released.

  While releasing the handle 6a of each handle portion 6 after release, the fixing device 1 screwed into the roll shaft screw portion Sa1 is moved backward while rotating in the direction opposite to the rotation direction at the time of fixing around the screw hole 2a. When the roll shaft screw part is detached from the screw hole 2a, the fixing device is detached from the roll shaft screw part.

  According to the rolling roll fixing device 1 shown in FIG. 1, the rolling roll is fixed by hydraulic pressure after tightening by rotation of the fixing device, and it is not necessary for the operator to support the fixing device during the fixing operation. It is possible to reduce the work burden of the worker, which is a problem of the above, and to contribute to the improvement of the fixed workability.

  Further, since the material of the piston 3 and the spring cover 4 is made of a light alloy such as aluminum or titanium, it is possible to reduce the weight of the entire fixing device and secure the strength, thereby reducing the burden on the operator. . Further, if alloy steel is used for the cylinder 2, high strength can be maintained. As described above, the material of the cylinder 2, the piston 3 and the spring cover 4 is preferably alloy steel or light alloy, but is not necessarily limited to the above example.

M Rolling Machine R Rolling Roll S Roll Shaft Sa Roll Shaft Mounting Portion Sa1 Roll Shaft Screw Portion T Taper Sleeve Ta End Face of Tapered Sleeve 1 Rolling Roll Fixing Device 2 Cylinder 2a Screw Hole 2b Storage Hole 2b1 Hydraulic Leakage Step 3 Piston 3a Addition Pressure end face 4 Spring cover 4a Spring cover end face 4b Spring cover protruding part 5 Spring 6 Handle part 6a Handle 6b Mounting frame 6c Bolt

Claims (4)

In a fixing device that fixes a hollow rolling roll to a roll shaft that is cantilevered by a rolling mill via a taper sleeve that is fitted to the roll shaft,
A cylinder provided with a piston capable of pressurizing the taper sleeve from a direction opposite to the drive side of the rolling roll, a cylindrical spring cover connected to the cylinder, and a spring provided in the spring cover ; Prepared ,
The cylinder has a storage hole for storing the piston movably in the axial direction,
The spring is disposed between the piston and a spring cover, and applies a spring force in a direction returning to the piston .
The cylinder is configured to be screwed into the tip of the roll shaft,
In a state where the cylinder is screwed into the tip of the roll shaft, a spring cover end surface which is an end surface on the rolling roll side of the spring cover is formed so as to press the end surface of the rolling roll. Rolling roll fixing device.
The apparatus for fixing a rolling roll according to claim 1, wherein both the piston and the spring cover are made of a light alloy. The apparatus for fixing a rolling roll according to claim 1 or 2, wherein a step for hydraulic leakage is formed on an inner peripheral surface of the opening end on the rolling roll side of the storage hole of the cylinder. The one end part of the said spring is latched by the edge part by the side of the said rolling roll of the said spring cover, and the other end part is latched by the said piston. The Claim 1 thru | or 3 characterized by the above-mentioned. Rolling roll fixing device.

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