JPH0246288B2 - MARUBOKYOSEIKINOKYOSEIROORUKENMASOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polishing device for straightening rolls in a round bar straightening machine.

In general, vertical and horizontal round bar straightening machines use a cylindrical flat roll and a set of convex and concave straightening rolls, which are rolled up and down or left and right on the straightening machine body frame via their respective bearing housings. The straightening work is performed by passing the material to be straightened between a pair of straightening rolls, which are equipped with a device whose axes intersect so that the angle and pressure can be freely adjusted. It wears out due to friction, and local indentations occur due to biting of the material to be straightened, impact, etc., causing scratches on the straightening material, and local wear makes it impossible for the straightening roll to perform proper and precise straightening. Conventionally, in this type of apparatus, it was difficult to polish the straightening roll as it was due to its external shape, so the straightening roll was removed from the straightening machine body and polished. However, as mentioned above, the straightening rolls are attached to the straightening machine body frame via bearing housings so that they can rotate and be adjusted freely, so it not only takes a considerable amount of time and effort to remove and assemble them. However, there are major disadvantages in that the straightening machine cannot be moved to, attached to, or removed from the polishing machine immediately and easily, and the straightening machine must be stopped during that time.

Therefore, the present invention makes it possible to immediately, easily and automatically polish the straightening rolls of a round bar straightening machine as needed during operation, without having to remove each straightening roll from the fixed frame of the straightening machine body. The purpose of the present invention is to provide a straightening roll polishing device that can keep the surface of the straightening roll clean and smooth to enable precise straightening work on a material to be straightened.
An embodiment shown in the drawings will be described below.

FIG. 1 is an overall schematic view showing an example of a round bar straightening machine to which the device of the present invention is applied, in which 1 is the straightening machine body, 2 and 3 are rolls placed above and below the straightening machine body frame via bearing housings 4 and 5, respectively. This is a set of straightening rolls whose axes intersect with each other so that the angle and roll can be freely adjusted.The roll surfaces have a ∧-shaped convex shape and a ∨-shaped concave shape.

In such a round bar straightening machine, a bearing plate 7, a
7' is attached, and two guide shafts 10, 1 are attached above and below parallel to the straightening roll axis across the bearing plates 7, 7'.
0 is supported, and a left helical groove 11 and a right helical groove continuous to the shaft surface between the bearing plates 7 and 7' are placed at an appropriate parallel interval on the outside of the lower guide shaft 10 across the bearing plates 7 and 7'. A rotating shaft 13 provided to intersect the spiral grooves 12 is mounted on a shaft, and a bearing portion 6 on one end side of the rotating shaft is mounted.
A reducer 14 is attached to the outer surface of the transmission shaft 1.
5 and one end of the rotating shaft 13 are connected by a coupling ring 16, and a chain wheel 17 provided on the input shaft side and a chain wheel 18 provided at the end of the roll shaft of the roll of the straightening roll 3 are successively rotated by a chain 19. Drive the shaft 13.

On the other hand, between the bearing plates 7 and 7', the guide shaft 1
A square block-shaped sliding body 20 is provided so as to be slidably fitted across the rotating shaft 13 and the rotation shaft 13, and the sliding body 20 extends along a center line a connecting the center of the straightening roll 3 and the intermediate portion of the sliding body 20. A cylinder lid 23 has a cutout hole 21 shaped like this on the inside on the straightening roll side, and a compressed air inlet/outlet 22 on the opposite outside.
Cylinder chamber 24 with closed cylinder, compressed air inlet/outlet 22
Equipped with an air cylinder 28 containing a piston 26 and a piston rod 27, which are advanced and retracted as needed by compressed air from the air and a spring 25 interposed,
The tip of the piston rod 27 is fitted and connected to the block 29 fitted into the notch hole 21, and a square hole-shaped notch 30 is formed at the tip of the block.
An abrasive material support 32 to which an abrasive material 31 such as a buff or a whetstone is attached is fitted and attached to the block 2.
9 is fixed with a set screw 33 threaded onto the tip end of the sliding body 20, and a stepped recessed part 34 is provided on one side of the lower part of the sliding body 20 to expose a part of the rotating shaft 13.
Engagement pawls 36 which alternately engage the left helical groove 11 or the right helical groove 12 of the rotary shaft 13 at the end of the helix in a freely cutting manner are pivotably supported by a support shaft 37 on a cover plate 35 attached to the surface of the rotary shaft 13. , a structure of a straightening roll polishing device in which a telescopic spiral air pipe 38 is connected to the compressed air inlet/outlet 22 of the air cylinder 28, and the air pipe is connected to a compressed air supply source via a solenoid valve (not shown); This straightening roll polishing device is provided on each side of the straightening rolls 2 and 3, as shown in FIG. In the figure, reference numeral 39 denotes telescopic left and right spiral groove covers installed across the sliding body 20 and the bearing plate 7'.

In this device, instead of the reducer 14, the rotating shaft 1
In some cases, a hydraulic motor is directly connected to one end of 3. Further, the spiral groove on the surface of the rotating shaft 13 is a single-threaded spiral groove, and a reversible electric motor is provided at one end of the rotating shaft 13, so that when the sliding body 20 reaches both left and right ends of the spiral groove, the rotation direction is automatically switched. The rotating shaft 13 may be configured to alternately rotate in different directions.

The present invention has the above configuration, and the respective straightening rolls 2,
3 is driven by a drive device (not shown) connected to opposite roll shaft ends, and performs the straightening work by passing the material to be straightened between the straightening rolls 2 and 3;
At this time, the rotation of the straightening rolls 2 and 3 is transmitted to the reducer 14 via the chain wheel 18, chain 19, and chain wheel 17, respectively, and the rotation shaft 13 of the straightening roll polishing device is rotated by the transmission shaft 15. If the engaging pawl 36, which is pivotally supported on a local part of the sliding body 20 by a support shaft 35, is engaged with the right spiral groove 12, the sliding body 20 will be rotated by the rotation of the rotating shaft 13.
slides to the right along the guide shafts 10, 10,
When the helical end is reached, the engaging pawl 36 turns around the support shaft 37 and is engaged with the left helical groove 11, and the rotating shaft 1
The engaging claw 3 is slid leftward as the thread 3 rotates for a certain period of time, and is again pivotably engaged with the right spiral groove 12 at the end of the spiral.
6, the sliding body 20 reciprocates left and right along the guide shafts 10, 10 along the entire length of the left and right spiral grooves.

In this way, when compressed air is sent from the spiral air pipe 38 connected to the compressed air supply source by operating a solenoid valve (not shown), the high pressure air injected into the cylinder chamber 24 from the compressed air inlet/outlet 22 causes the piston 26 and the piston rod to 27 is propelled toward the straightening rolls 2 and 3 against the spring 25, and the block 29 connected to the piston rod 27 moves forward along the notched hole 21, and at the same time polishes the abrasive support 32 attached to the tip of the block 29. The material 31 is brought into contact with the surfaces of the straightening rolls 2 and 3 under a predetermined pressure, polishing the surfaces of the straightening rolls that are being driven, and the abrasive material 31 is brought into contact with the axes of the straightening rolls 2 and 3 by the reciprocating sliding motion of the sliding body 20. The entire surface of the roll is polished by reciprocating sliding movement along the direction.

Also, when stopping the polishing of the straightening rolls 2 and 3,
By opening the compressed air return circuit of the spiral air pipe 38 by operating a solenoid valve, the piston 26 and piston rod 27 are moved back by the repulsive force of the spring 25, and the abrasive material 31 is also moved back together with the rod as shown in FIG. The abrasive material 31 is then separated from the surface of the straightening roll and the polishing operation is stopped.
Only the reciprocating movement is performed by the rotations 1 and 12 and the engaging operation of the engaging claws 36 that alternately engage with the spiral grooves.

Generally, the straightening rolls 2 and 3 are used in combination of a convex roll with a ∧ shape in the center and a concave roll with a ∨ shape, and the abrasive material 31 contacts the surface of the straightening roll and reciprocates in the axial direction. At this time, if the abrasive material 31 is brought into contact with the air cylinder 28 at a predetermined pressure according to the minimum diameter of the straightening roll, the abrasive material 31 will use the compressed air in the cylinder chamber 24 as a cushion in the portion where the roll diameter is large. It is elastically retracted together with the piston 26 and piston rod 27, and is repeatedly moved forward and slid back and forth in the small diameter portion, so that the roll surface can be appropriately polished along the outer shape of the straightening rolls 2 and 3. It is.

In addition, when a hydraulic motor is provided at the end of the rotating shaft 13 instead of the reducer 14, the chain wheels 17, 1
8 and chain 19 are unnecessary, and the surface of the straightening roll can be polished while the straightening roll is in operation by rotating the rotary shaft 13 by driving the hydraulic motor in exactly the same manner as described above.

Moreover, when the spiral groove of the rotating shaft 13 is made into a single thread,
By making the motor that drives the shaft reversible and rotating it alternately, the sliding body 20 can reciprocate and polish the straightening roll in the same manner as described above.

As explained above, according to the device of the present invention, an air cylinder device having an abrasive material inside the sliding body holds the abrasive material movably on the roll surface along the radial direction of the straightening roll, and the sliding body is held on the roll surface along the radial direction of the straightening roll. The guide shaft is mounted parallel to the side, and the rotary shaft has a helical groove with a single thread on the shaft surface, or a left helical groove and a right helical groove. is provided with a rotatable engagement pawl that engages with the spiral groove and alternately switches and engages at the terminal ends of the left and right spiral grooves, and is connected to the rotary shaft which is transmitted from a motor connected to the end of the rotary shaft or a straightening roll shaft. Since the sliding body is caused to make a reciprocating sliding motion by constant rotation, the abrasive material is moved back and forth in the axial direction by the air pressure and spring in the cylinder chamber according to the convex and concave roll surface shapes of the straightening roll with different diameters. The entire roll surface can be polished by sliding reciprocally in the roll axis direction while always being pressed against the straightening roll surface with a predetermined pressure. When the straightening roll, which is rotatably adjusted and supported by an angle adjustment device to change the angle, wears out, it can be adjusted immediately as needed while the straightening machine is operating, without having to remove each straightening roll from the straightening machine body frame. The straightening roll can be easily and easily polished automatically, there is no need for troublesome readjustment of the straightening roll, and the straightening roll can always be held smooth according to the convex or concave shape of the roll's outer shape. There is also no possibility of scratches on the straightening material due to local wear, worn concave edges, impressions, etc. Furthermore, the surface of the straightening roll can be polished at the same time during operation, and there is no need to stop the straightening machine due to removal for polishing the straightening roll as in the past, eliminating the trouble of polishing, wasting labor and time, and improving work efficiency. It has such great effects.

[Brief explanation of drawings]

Fig. 1 is a schematic front view showing an example of a round bar straightening machine to which the present invention is applied, Fig. 2 is a diagram showing the arrangement of this device with respect to the straightening rolls of the straightening machine, and Fig. 3 is a straightening machine that is an embodiment of the present invention. A front view of the roll polishing device, FIG. 4 is a plan view of the main parts, FIG. 5 is a detailed sectional view of the main parts of the device, FIG. 6 is a right side view of FIG. 5, and FIG. 7 is a left side view of the same. Cut out a part with. 2, 3... Straightening roll, 4, 5... Bearing housing of the straightening roll, 10... Guide shaft, 11...
Left spiral groove, 12... Right spiral groove, 13... Rotation shaft,
14... Motor or speed reducer, 22... Compressed air inlet/outlet, 24... Cylinder chamber, 25... Spring, 26... Piston, 27... Piston rod, 28... Air cylinder, 29... Block,
31... Abrasive material, 36... Engaging claw.

Claims (1)

[Scope of Claims] 1. A round bar straightening machine having a pair of convex and concave straightening rolls intersecting each other so as to be able to adjust the angle via a bearing housing that can be rotated vertically or horizontally as well as a rolling device. , a guide shaft parallel to the roll axis through a rotatable bearing housing on the side of each straightening roll, and left and right spiral grooves intersecting the shaft surface, and a motor installed at the shaft end. Alternatively, a rotary shaft driven by a speed reducer transmitted from the straightening roll shaft is mounted on the shaft, and a pivotable engagement in which the side ends alternately switch and engage the helical groove across the guide shaft and the rotary shaft. A sliding body is provided that allows the claw to be locally pivoted and slid back and forth, and a cylinder chamber having a compressed air inlet/outlet at one end in the radial direction of the straightening roll, a piston that returns with a spring, and a piston rod are built into the sliding body. An abrasive material (grindstone) for the surface of the straightening roll is attached to the other end of the piston rod via a block, and the abrasive material is slid forward and backward on the surface of the straightening roll and back and forth in the axial direction of the roll. Straightening roll polishing device for round bar straightening machine. 2 The spiral groove on the surface of the rotating shaft is a single screw spiral groove,
A straightening roll polishing device for a round bar straightening machine according to claim 1, wherein the rotating shaft is rotated alternately in different directions by a reversible motor.