KR100988521B1 - Composite roll with divided ring fixed by key - Google Patents

Abstract

The present invention relates to a composite roll, and more particularly, to a composite roll having a lock ring of a key locking type capable of stably fixing the lock split ring by fixing a lock split ring using a key, .

In the related art, there is a problem that the bolt fixing the lock split ring is damaged by the repeated torque action. However, according to the present invention, the ring key is inserted into the groove of the oil pressure unit and the lock split ring, It is possible to stably fix the lock split ring without slippage, thereby preventing the occurrence of slippage.

Compound roll, lock split ring, key

Description

A composite roll having a lock ring of a key fixing type. {Composite roll with divided ring fixed by key}

The present invention relates to a composite roll, and more particularly, to a composite roll having a lock split ring of a key lock type which can stably fix the lock split ring by fixing the lock split ring using a key, Roll.

Generally, a composite roll is used for rolling a wire rod and will be described with reference to Figs. 1A to 2.

As shown in FIGS. 1A and 1B and FIG. 2, a conventional composite roll 1 includes a rolling ring 20, a hydraulic unit 50, a lock split ring 40, and a nut (not shown) 60).

The shaft 10 has a protruding sleeve 11 on one side and a spiral 12 on the other side.

The rolling ring 20 is a member for rolling a wire with an embossing 21 formed on its surface and is pressed and mounted on the side of the projecting sleeve 11 of the shaft 10.

The oil pressure unit 50 has a piston ring 70 for contacting the rolling ring 20 while pushing the rolling ring 20 toward the projecting sleeve 11 side.

At this time, the lock split ring 40 is mounted between the oil pressure unit 50 and the rolling ring 20.

Meanwhile, a method of installing the spacer 30 between the rolling ring 20 and the oil pressure unit 50 and then mounting the lock split ring 40 on the spacer 30 is also used.

A method of mounting the lock split ring 40 on the conventional composite roll 1 will be described.

First, the rolling ring 20, the spacer 30 and the oil pressure unit 50 are mounted on the shaft 10, the nut 60 is tightened, and the oil pressure is applied to the oil pressure unit 50.

When the oil pressure is applied to the oil passage 51 of the oil pressure unit 50, the piston ring 70 is pushed toward the rolling ring 20 so that the rolling ring 20 is pressed against the protruding sleeve 11 of the shaft 10, .

The space between the oil pressure unit 50 and the spacer 30 is increased by the action of the hydraulic pressure, and the lock split ring 40 is installed in the increased space.

Even if the hydraulic pressure is removed after the lock split ring 40 is mounted as described above, the lock split ring 40 is inserted and presses the rolling ring 20 continuously so that the rolling ring 20 So that it is stably and firmly fixed.

The rolling ring 20 is typically made of tungsten carbide, and the rolling ring made of the above material is called a tungsten carbide ring.

The tungsten carbide has a very high hardness and is manufactured by grinding the outer diameter and shape of the roll with a grinding machine containing diamond particles. When rolling by the TC ring using such tungsten carbide, the machined surface is very clean and precise, It is suitable for rolling of wire products.

In this case, a composite roll structure in which a composite roll for rolling is not made of the above-described tungsten carbide but is made of a combination of various parts is made of tungsten carbide because the tungsten carbide material is resistant to impact and bending, .

The lock split ring 40 used for fixing the rolling ring 20 is generally divided into two split rings and fixed to the spacer 30 by means of bolts.

In the case of such a composite roll 1, a slight slip occurs between the lock split ring 40 and the shaft 10 when the torque is applied. At this time, a shear force is applied to the bolt in the circumferential direction (direction I) .

However, the front end supporting the shearing force has a cross sectional area based on the bone diameter of the bolt, and the front end surface thereof is very small.

In other words, a relatively large shear stress is applied due to a small cross section of the bolt, so that when the torque is repeatedly applied, the bolt often breaks due to shear stress, There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a composite split ring comprising a lock split ring and a ring key for fixing a lock split ring for fixing the lock split ring by forming a groove in the oil pressure unit, In order to solve the problem.

In order to achieve the above object, according to the present invention, there is provided a spark plug having a shaft having a protruding sleeve on one side and a spiral on the other side, a rolling ring mounted on the shaft, and a piston ring in contact with the rolling ring, A composite roll comprising a ring-shaped oil pressure unit, a lock split ring mounted between the oil pressure unit and the rolling ring, and a nut coupled to a spiral of the shaft to support the oil pressure unit, The oil pressure unit has an annular groove engraved at a corresponding position on a side where the oil pressure units are in contact with each other. The oil pressure unit has an insertion hole formed in the outer circumferential surface and communicating with the groove and extending in the vertical direction, A ring key inserted over the groove of the oil pressure unit and the groove of the lock split ring; Composite roll comprising a locking ring of the key fixing system comprising a fixing member for restricting the movement direction is characterized.

As described above, in the related art, there has been a problem that the bolts fixing the lock split ring are damaged by repetitive torque action. However, according to the present invention, when the ring key is inserted into the grooves of the oil pressure unit and the lock split ring, The lock split ring can be stably and firmly fixed without being damaged by water, and the torque transmitting force can be maintained even if minute slippage occurs.

The present invention is described in more detail below with reference to the accompanying drawings and embodiments, as described above, by providing a ring key between the hydraulic unit and the lock split ring to stably fix the lock split ring.

Example 1

3 shows an embodiment of the oil pressure unit 110, the lock split ring 130, and the ring key 120 of the present invention, and their coupling relationship.

The ring key 120 has a ring shape and is inserted into annular grooves 112 and 132 to be described later to fix the lock split ring 130 so as not to be detached.

FIG. 3 shows an example in which a part of the ring key 120 is cut to show its cross section, and the lock split ring 130 is divided into two parts.

In this embodiment, the ring key 120 is formed as a plate-like ring having a thin thickness.

However, the ring key 120 of the present invention falls within the scope of the present invention as long as its shape is inserted into the grooves 112 and 132 to be described later so that the lock split ring 130 is not separated. 120 are not limited in scope by the present embodiment.

Hereinafter, a groove into which the ring key 120 is inserted will be described.

The grooves 112 and 132 are engraved in an annular shape at corresponding positions of mutually abutting sides of the lock split ring 130 and the oil pressure unit 110 and the ring keys 120 are inserted into the grooves 112 and 132, .

The other end of the ring key 120 is inserted into the groove 132 of the lock split ring 130 while one side of the ring key 120 is inserted into the groove 112 of the oil pressure unit 110, The lock split ring 130 can be stably fixed by preventing the lock ring 130 from being separated from the shaft 10 side.

In this embodiment, the grooves 112 and 132 are shaped like a U-shaped slot, and the grooves 112 and 132 formed in the oil pressure unit 110 and the lock split ring 130 are positioned at mutually corresponding positions .

Since the ring key 120 of this embodiment has a plate-like annular shape, the grooves 112 and 132 are formed at positions corresponding to each other as described above.

However, since the grooves 112 and 132 are intended to insert the ring key 120, any shape that can achieve this purpose will fall within the scope of the present invention.

Meanwhile, the hydraulic unit 110 of the present invention has an insertion hole 113.

The insertion hole 113 is formed in an outer circumferential surface thereof and communicates with the groove 112 and extends in a vertical direction.

The fixing member F is fastened to the insertion hole 113 to fix the ring key 120.

A description will be given of a mounting method of the oil pressure unit 110, the ring key 120 and the lock split ring 130 of the present invention and a configuration for fixing the ring key 120 by the fixing member F do.

4 to 6 show how the oil pressure unit 110 and the ring key 120 of the present invention and the lock split ring 130 are mounted on the conventional nut 60, the rolling ring 20 and the shaft 10, Fig.

4 is a state in which the ring key 120 is inserted into the groove 112 of the oil pressure unit 110 and then the nut 60 is mounted.

At this time, as described above, when the working fluid is supplied through the oil passage 111 of the oil pressure unit 110 to apply hydraulic pressure, the piston ring 70 is pushed toward the rolling ring 20, As a result, the space between the spacer 30 and the oil pressure unit 110 is increased.

At this time, the lock split ring 130 is mounted in the increased space as shown in FIG.

6, the ring key 120 is moved to the groove 132 side of the lock split ring 130, and then the fixing member F is engaged with the insertion hole 113 of the oil pressure unit 110 .

At this time, the insertion hole 113 is formed in the outer peripheral surface of the oil pressure unit 110 as described above, and communicates with the groove 112 of the oil pressure unit 110 and extends in the vertical direction.

When the fixing member F is engaged with the insertion hole 113 as described above, the fixing member F is brought into contact with the ring key 120 coupled to the groove 112 of the oil pressure unit 110 .

The fixing member F pushes the ring key 120 toward the lock split ring 130 to fix the ring key 120 across the two grooves 112 and 132. [

In other words, the fixing member F contacts with the ring key 120 to restrict axial movement of the ring key 120, and as a result, the ring key 120 is fixed.

The piston ring 70 returns to its original position but the spacer 30 and the rolling ring 20 are moved in the same direction as the piston ring 70. In this case, when the operating fluid injected into the oil pressure unit 110 is discharged after the fixing member F is installed, The lock split ring 130 is inserted and the pressurized state is maintained.

By this action, the presser ring 20 can be rotated with the shaft 10 in the state of being pressed in the axial direction, so that the workpiece (not shown) can be rolled.

On the other hand, in this embodiment, the fixing member F is a bolt. However, since the bolt is only one embodiment of the fixing member F of the present invention, the fixing member F of the present invention can be inserted into the insertion hole 113 and contacted by the ring key 120, It is natural to belong to the category of.

As in the present embodiment, spiral lines 113a and 113b are formed in the insertion hole 113 or at a portion of the insertion hole 113 extending in the vertical direction and contacting the bottom surface of the groove 112, It is also preferable that the bolts of the embodiment can be stably fastened.

In the past, the lock split ring was directly fixed by the bolts as described above.

In this prior art, when a torque is applied, a slight slip occurs between the lock split ring and the shaft, at which time a shearing force acts on the bolt in the circumferential direction.

However, since the front end supporting the shearing force has a sectional area based on the bore diameter of the bolt, the front end thereof is very small, so that the bolt is broken or the female screw is often damaged. As a result, the fastening force of the bolt is lost, There was a problem that it deviated.

However, according to the ring key 120 of the present invention, since the lock split ring 130 is fixed in the radial direction while being inserted into the grooves 112 and 132 as described above, even if the torque is repeatedly applied, So that even if a slip occurs between the lock split ring 130 and the oil pressure unit 110, the mutual coupling state between the parts remains unchanged, so that the torque transfer force is maintained at the initial state Thereby providing a bonding structure that remains the same.

Therefore, unlike the related art, there is no problem that the lock split ring 130 is disengaged according to the present invention, so that the lock split ring 130 can be stably fixed.

In this embodiment, the ring key 120 is formed as an integral type, but it is also possible to divide the ring key 120 into a plurality of rings.

That is, as shown in FIG. 7, when the ring key 120 is divided into three parts, it is possible to insert the nut 60 into the groove 112 of the child unit 110 after coupling the nut 60 described above.

However, the number of divided parts is not limited. However, since the number of divided parts is large and the length in the circumferential direction is short, the workability is poor. Therefore, the number of divided parts should be limited to a number that can secure a circumferential length that is easy to work with.

Example 2

This embodiment relates to another embodiment of the configuration in which the ring key 120 of the present invention is installed and will be described with reference to Fig.

8 is a view showing an embodiment of the oil pressure unit 110, the lock split ring 130, and the ring key 120 according to the present invention and their associated relationship.

In this embodiment, the ring key 120 is provided in the ring key mounting portions 112-1 and 132-1, unlike the grooves 112 and 132 in the first embodiment.

That is, a ring key mounting portion 112-1, 132-1 (see FIG. 2) formed stepwise on the outer circumferential surface of each of the lock split ring 130 and the oil pressure unit 110 by removing the circumferential edge between the side surface and the outer circumferential surface, ) Portion.

In other words, when the ring key 120 is inserted into the grooves 112 and 132 in the case of the first embodiment, in the case of the second embodiment, the lock split ring 130 is formed on the ring key mounts 112-1 and 132-1, Respectively.

At this time, since the ring key 120 has a closed circular shape, the lock split ring 130 is inserted into the ring key mounts 112-1 and 132-1 as described above, ) Is fixed.

Therefore, in the second embodiment, the ring key 120 is not allowed to be divided as in the first embodiment.

In the present embodiment, the ring key mounting portions 112-1 and 132-1 have a stepped shape. However, the ring key mounting portions 112-1 and 132-1 of the present invention are not limited to the ring key 120 It is of course intended that the lock split ring 130 be able to be fitted, and it is of course within the scope of the present invention that this purpose is achieved and the ring key mounts 112-1, 132-1 are provided, The ring key mounting portions 112-1 and 132-1 of the present invention are not limited to this embodiment.

In the present embodiment, the insertion hole 113-1 is formed in contact with the ring key mounting portion 112-1 of the oil pressure unit 110 and extends in the vertical direction, unlike the first embodiment.

The above-described fixing member F is inserted into the insertion hole 113-1 of the present embodiment to limit axial movement of the ring key 120 (see FIG. 9).

The configuration of the ring key mounting portions 112-1 and 132-1 and the insertion hole 113-1 is the same as that of the first embodiment described above, and thus a detailed description thereof will be omitted.

Example 3

This embodiment relates to the lock split ring 130 and will be described with reference to FIG.

The lock split ring 130 described above has been described with respect to the case of the split split ring 130 as shown in FIG. 3 or 8, but it may be divided into a plurality of split split rings.

That is, as shown in Fig. 10, it is also possible to use four parts.

Figs. 1A and 2 are partially cross-sectional perspective and cross-sectional views of a conventional composite roll,

Figures 3 to 6 are partial cross-sectional perspective and sectional views of the hydraulic unit, ring key, lock split ring of the present invention,

Figure 7 is a perspective view of another embodiment of the ring key of the present invention,

8 to 10 are perspective views of another embodiment of the lock split ring of the present invention,

Description of the Related Art

 1: conventional composite roll 10: shaft

 11: protruding sleeve 12: spiral

 20: rolling ring 21: embossing

 30: spacer 40: lock split ring

 41: Fixing hole F: Fixing member

 50: oil pressure unit 51:

 60: Nut 70: Piston ring

       100: Lock ring fixing device 110: Hydraulic unit

       111: Euro 112: Groove

       112-1: Link key mounting portion 113: Insertion hole

       113a, 113b: helix F: fixing member

120: ring key 120-1: ring key (split)

130: lock split ring 131: lock split ring body

132: groove 132-1 link key mounting part

130-1 Lock ring (4 split)

Claims (4)

A ring shaped oil pressure unit having a piston ring which is in contact with the rolling ring and which is actuated by hydraulic pressure; A lock split ring mounted between the unit and the rolling ring; and a nut coupled to a spiral of the shaft to support the hydraulic unit, Wherein the lock split ring and the oil pressure unit are each provided with an annular groove engraved at a corresponding position on a side where they mutually abut, Wherein the oil pressure unit has an insertion hole formed on an outer circumferential surface thereof and communicating with the groove and extending in a vertical direction, A ring key inserted into the groove of the oil pressure unit and the groove of the lock split ring, And a locking member fastened to the insertion hole to restrict axial movement of the ring key. The method according to claim 1, Wherein the ring key is divided into a plurality of ring keys. A ring shaped oil pressure unit having a piston ring which is in contact with the rolling ring and which is actuated by hydraulic pressure; A lock split ring mounted between the unit and the rolling ring; and a nut coupled to a spiral of the shaft to support the hydraulic unit, The link split ring is formed on each outer peripheral surface of the lock split ring and the oil pressure unit, The hydraulic unit has an insertion hole extending in a vertical direction in contact with a ring-shaped mounting portion of an outer circumferential surface, A ring key mounted on the linking portion of the oil pressure unit and the lock split ring, And a locking member fastened to the insertion hole to restrict axial movement of the ring key. The method of claim 3, Wherein the lock ring mounting portion is formed in a stepped shape on each of the outer circumferential surfaces by removing the circumferential edges between the side surfaces and the outer circumferential surfaces of the lock split ring and the oil pressure unit, Compound roll.

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