JPH03264141A - Ring rolling mill - Google Patents

Abstract

PURPOSE:To enhance working efficiency and to decrease the deformation of plural inserting rolls by supporting a rotary holder projectingly provided with these inserting rolls freely rotatably forward and backward in a vertical direction and cooperating the inserting rolls and a pressurizing roll, thereby spin- rolling a work. CONSTITUTION:The plural inserting rolls 14 are protruded on the rotary holder 12. The inserting rolls 14 in a horizontal state are inserted into the hole of the work W0. The rotary holder 12 is rotated to move the work W0 to a rolling operation position. An inserting roll holder 15 is moved downward to hold by front end side of the inserting rolls 14. The work W1 is pinched by edge rolls 17. The rotary holder 12 is moved to a forward side and the outer side face of the work W1 is pressed to the lateral peripheral surface of the pressurizing roll 7 under rotation. The work W1 is rolled by the cooperation of the pressurizing roll 7 and the inserting rolls 14. The work W1 is forged and molded to a ring product W2 in a short period of time by this ring roll mill.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ring rolling mill for forming ring products from steel materials by forging, and particularly relates to a ring rolling mill that is inserted into a hole in a material having a hole in the center and rotates in forward and reverse directions. A ring with a structure in which a plurality of flexible insertion rolls are provided protruding from a rotary holder at predetermined angles in the radial direction, and the rotary holder, on which the plurality of insertion rolls are protruded in the radial direction, is supported so as to be able to rotate forward and backward in the vertical direction. It concerns rolling mills.

[Conventional technology]

Conventionally, when forming a ring product from a steel material by forging, the process is usually carried out using a ring rolling mill having a configuration as shown in FIG.

That is, the material W, which has a hole drilled in the center by another press machine, is rotatably mounted on the longitudinal center of the ped 31 of the ring rolling mill near one end in the longitudinal direction. A pressure roll 33 is fixed to the vertical main shaft 32, and a movable frame 34, which is separately provided on the bed 31 so as to be movable in the longitudinal direction, is rotatably attached to the end near the vertical main shaft 32. The material W is conveyed horizontally between the vertical insertion rolls 35 and the material W is rolled in the thickness direction between these rolls 33. The material W is rolled in the height direction between a pair of upper and lower edge rolls 36 and 36, each of which has a conical outer peripheral surface.

In this way, there is only one insertion roll 35, and when the unrolled material W is carried in following the unloading of the rolled product W, the insertion roll 35 is held by the insertion roll upper holder 38 directly connected to the hydraulic cylinder 37. It is pulled up to the top,
After the material W is carried in, the insertion roll 35 descends, and then the material is rolled.

In addition, as a special type of ring rolling mill, as shown in FIG. 4, there is a pressurizing roll 61 mounted vertically in the center that can be rotated, and a rotary table 62 having a central opening around the pressurizing roll 61 can be rotated horizontally. A horizontal multi-axis ring rolling mill is known in which the rotary table 62 is provided with at least four insertion rolls 63 and four holding rolls 64 on the surface thereof. In this horizontal multi-axis ring rolling mill, a pressure roll 61 is used during rolling.
The rotational center position of the rotary table 62 and the rotational center position of the rotary table 62 are eccentrically shifted from each other, and the rotary table 62 rotates eccentrically.

[Problem to be solved by the invention]

However, in the conventional ring rolling mill shown in FIG. 3, after rolling is completed, the insertion roll 35 is raised, and the product W is ready to be carried out, the product W is carried out from the rolling table 39 and then The rolling materials W were brought in in chronological order, and these operations could not be carried out simultaneously. For this reason, there is a problem in that work productivity is low.

Furthermore, since the loading of the material W and the loading of the product W are generally performed using separate devices, there is a problem in that it takes time from loading the product W to loading the raw material W, further reducing production efficiency.

In addition, since only one insertion roll 35 is used in the severe rolling operation, the insertion roll 35 must be replaced frequently, which further deteriorates productivity.

On the other hand, in the horizontal multi-axis ring rolling mill shown in FIG. 4, rolling of the material W, carrying out of the product W, and carrying in of the material W can be performed simultaneously.

However, since the insertion roll 63 that rolls the material W from the inside is rotatably supported at a predetermined location on the rotary table 62, the eccentricity H of the pressure roll 61 (see FIG. 4(B))
Once the height of the product W is determined, the thickness of the final product W cannot be changed, and it is not possible to install an edge roll near the insertion roll 63 that rotates together with the rotary table 62 to roll the height of the product W. was complicated and difficult.

As a result, the thickness and height of the product W cannot be changed and adjusted.
If there are variations in the weight and dimensions of the raw material W before rolling, there will be variations in the outer diameter dimension of the product W after rolling, which poses the problem that it is not possible to obtain a product W with highly accurate dimensional tolerances. There is.

Further, the lower part of the insertion roll 63 that rolls the material W from the inside is supported by the rotary table 62.
It was difficult to provide a mechanism to support the upper part of 3 because it made the device complicated.

For this reason, the upper part of the insertion roll 63 is in an unrestricted state, and the insertion roll 63 has a cantilever support structure, so that the insertion roll 63 deteriorates earlier than when both the upper and lower parts are supported. However, there is a problem in that the insertion roll 63 must be replaced frequently.

Furthermore, in the conventional ring rolling mill shown in FIGS. 3 and 4, the rolled product W cannot be easily transported.
In addition, the insertion roll 3 heated while rolling the material W from the inside
5.63, it has problems such as not being able to be easily cooled.

This invention was devised in view of the above-mentioned problems and to solve the problems, and its purpose is to simultaneously carry out the loading and rolling of materials and the unloading of products. It is possible to improve work efficiency, reduce the deformation of the insertion roll during rolling, prevent early deterioration of the insertion roll caused by deformation, simplify the transport of products, and serve other purposes. The object of the present invention is to provide a ring rolling mill that can easily cool heated insertion rolls to prevent early deterioration.

[Means to solve the problem]

In order to achieve the above object, the invention according to claim 1,
A rotary holder in which a plurality of insertion rolls that are inserted into a hole in a material having a hole in the center and that can be freely rotated in the forward and reverse directions protrude at predetermined angles in the radial direction of the rotary holder, and the plurality of insertion rolls protrude in the radial direction. An insertion roll holder is provided that can be raised and lowered to hold the leading end of the insertion roll during rolling. It consists of a structure arranged on the side.

Further, the invention according to claim 2 provides a plurality of insertion rolls which are inserted into a hole in a material having a hole in the center and are rotatable in forward and reverse directions and protrude at predetermined angles in the radial direction of the rotary holder. A rotary holder protruding in the radial direction is supported so that it can rotate forward and backward in the vertical direction, and an insertion roll holder that holds the tip end of the insertion roll during rolling is provided so as to be movable up and down, and rotates the material in cooperation with the insertion roll. The pressure roll for rolling is disposed on the upper side of the rotary holder, and a cooling part for cooling the insertion roll is disposed on the lower side of the rotary holder.

[Effect]

The present invention having the above configuration operates as follows.

That is, according to the configuration of the invention as claimed in claim 1, since the plurality of insertion rolls are provided on the rotary holder at predetermined angle intervals, when the material is being rolled on the upper side of the rotary holder, other It works so that the carrying-in work of attaching the material to the insertion roll and the carrying-out work of extracting the ring product from other insertion rolls can be carried out simultaneously in parallel, and it also holds the tip of the insertion roll during rolling work, and the insertion roll In addition, since the insertion roll rotates vertically, the ring product inserted through the insertion roll will be able to prevent the insertion roll from being deformed significantly.
It works so that it comes off naturally due to gravity.

On the other hand, according to the configuration of the invention set forth in claim 2, it has the same effect as the invention set forth in claim 1, and furthermore, in addition to the rolling work, loading work, and unloading work of the material, cooling of the heated insertion roll It works so that tasks can be done simultaneously and in parallel.

〔Example〕

Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings.

Here, FIG. 1 is a partially cutaway side sectional view of the ring rolling mill, and FIG. 2 is a front view of the main parts.

In the figure, a motor 3, a joint 4, and a speed reducer 5 are installed at the bottom of one side of a bed 2 that constitutes the main body of a ring rolling mill 1. A transmission shaft 6 extending upward is interlockingly connected to the reducer 5, and a pressure roll 7 is attached to the upper end of the transmission shaft 6.

The pressure roll 7 rotates horizontally in conjunction with the drive of the transmission $1l16, and cooperates with the insertion roll 14 described later to release the material W0.
is pressurized to form a bottom shape into the ring product W2 by forging. The pressure roll 7 has a cylindrical shape, and its circular side circumferential surface presses and forges the outside of the material W.

The pressure roll 7 is provided adjacent to the uppermost position of the insertion roll 14 that rotates in the vertical direction.

A hollow box-shaped moving frame 8 is mounted on the upper surface of the other side of the bed 2.
is located. The movable frame 8 is movable in the longitudinal direction of the bed 2 on the top surface of the bed 2 via wheels 10 or guides by a hydraulic cylinder 9 fixed to the top surface of the bed 2.

A rotating holder shaft 11 is attached to the upper side of the bed 2 and below the movable frame 8. The rotating holder shaft 11 is mounted horizontally and parallel to the moving direction of the moving frame 8. Both ends of the rotating holder shaft 11 are fixed to the ped 2.

A rotary holder 12 is attached to the rotary holder shaft 11 so as to be freely rotatable in forward and reverse directions about the shaft. A rotary holder shaft 11 is inserted through the rotation center of the rotary holder 12, and the rotary holder shaft 12 is mounted so as to be movable in parallel along the axis of the rotary holder shaft 11.

A part of the rotary holder 12 is rotatably connected to the lower front end of the movable frame 8, and the rotary holder 12 is configured to move along the rotary holder shaft 11 in conjunction with the movement of the movable frame 8. There is.

Further, the rotating holder 12 is rotated by a rotating device 13 provided at the lower part of the adjacent movable frame 8. In this embodiment, it is set to rotate every 90 degrees.

As shown in 2yA, the rotary holder 12 has a cross shape, and a total of four insertion rolls 14 are provided at each tip of the rotary holder 12 to protrude in the radial direction of the rotary holder 12. Each insertion roll 14 has a cylindrical shape and a circular side surface.

Its lower part is rotatably and replaceably attached to each cross-shaped tip of the rotary holder 12.

Each insertion roll 14 is a material W having a hole in the center. is inserted through the hole, and cooperates with the pressure roll 7 described above to roll the inside of the material 11+. In this case, the insertion roll 14 rolls the inside of the blank while rotating.

Above the rolling position of the insertion roll 14, that is, the insertion roll 14
An insertion roll holder 15 that holds the leading end side of the insertion roll 14 during rolling is provided above the topmost position. The insertion roll holder 15 is attached to the lower surface side of the movable frame 8 extending above the uppermost position of the insertion roll 14 so as to be able to move up and down. The insertion roll holder 15 is connected to a hydraulic cylinder 16, and is moved up and down by the drive of the hydraulic cylinder 16.

Also, at the front end of the middle part of the moving frame 8, a material w1 for rolling is provided.
A pair of upper and lower edge rolls 17.1 rolls the height direction of the
7 is rotatably attached.

Each edge roll 17.17 has a frustoconical outer circumferential surface, and is mounted so that the vertically opposing outer circumferential surfaces thereof are substantially horizontal. Therefore, the lower edge roll 17 is mounted with its rotational center axis facing diagonally upward, and the upper edge roll 17 is mounted with its rotational center axis facing diagonally downward. Among these, the upper edge roll 17 is connected to a hydraulic cylinder 18, and can be raised and lowered by driving the hydraulic cylinder 18.

On the other hand, the lower edge roll 17 is fixed to the front end of the middle part of the movable frame 8.

On the lower side of the front end of the moving frame 8, there is a raw material -0 before rolling.
A material carrying table 19, a hydraulic cylinder 20, a material carrying cart 21, etc. are provided as equipment for carrying in the material in order to insert the material into the insertion roll 14. Material loading table 19
is integrally attached to the moving frame 8, and the hydraulic cylinder 20 is fixed to the upper surface of the material carrying table 19.

The material carry-in cart 21 loads the material Wo before rolling, moves back and forth on the upper surface of the material carry-in table 19, and transfers the material W to the horizontally positioned insertion roll 14. used for inserting. The material carrying cart 21 is connected to a hydraulic cylinder 20 and is configured to move back and forth by driving the hydraulic cylinder 20.

A cooling water tank 22, for example, is disposed on the lower side of the rotary holder 12 as a cooling section for cooling the insertion roll 14. The cooling water tank 22 is provided on the rotational movement locus of the lowermost position of the insertion roll 14 which is protruded from the rotary holder 12 . This cooling water tank 22 is filled with cooling water for cooling the entire insertion roll 14 heated during rolling. Cooling water heated by cooling the heated insertion roll 14 is circulated and cooled by a cooler (not shown).

Next, the operation based on the configuration of the above embodiment will be explained.

As shown in FIG. 2, the insertion roll 14 protruding from the rotary holder 12 is in the vertical and horizontal state, and the work of carrying in the material 11o, rolling the material W1, carrying out the ring product w2, and cooling the insertion roll 14 is carried out. done in parallel at the same time.

Material W. The import work will be carried out as follows.

That is, the material W0 is made such that the hole drilled in the center of the material W0 faces in the horizontal direction. is placed on the mounting surface of the material carrying cart 21. Then, the hydraulic cylinder 20 is driven to release the material W.

The material carry-in cart 21 carrying the material is moved forward. In the forward direction of the material carrying cart 21, the insertion roll 14 is located in a horizontal state on the right side of the drawing.

Therefore, when the material carry-in cart 21 carrying the material lvo is further advanced, the leading end side of the insertion roll 14 is inserted into the hole of the material W0. When the insertion roll 14 is fully inserted into the hole of the material No., when the mounting surface of the material carrying cart 21 is lowered, the material quality is determined. is held by the insertion roll 14, and a gap is created between the material 11o and the mounting surface of the material carrying cart 21, so that only the material carrying cart 21 can be moved backward, and the material w. The transport work has been completed. After completion, the rotating device 13
The rotating holder 12 is rotated 90 degrees counterclockwise to remove the material. is moved to the uppermost rolling work position. In parallel with this, the loading work will be carried out again.

On the other hand, when the insertion roll 14 through which the material W0 has been inserted reaches the uppermost rolling operation position, the insertion roll holder 15, which had retreated upward, moves downward and holds the leading end side of the insertion roll 14. Further, the raw material W1 is sandwiched from above and below by edge rolls 17 and 17. In this state, the hydraulic cylinder 9 is driven to rotate the rotary holder 12.
move it to the front. When the rotating holder 12 moves forward, the outer surface of the material W1 inserted through the insertion roll 14 comes into contact with the side peripheral surface of the rotating pressure roll 7. The material W1 that is in contact with the side circumferential surface of the rotating pressure roll 7 is rolled, and the rolling of the material W is performed by the cooperation of the pressure roll 7 and the insertion roll 14, and the material W is turned into a ring product W in a short time. Forged and formed. At this time, the insertion roll 14 is heated and becomes easily deformed due to the reaction force from the pressure roll 7 and the material W1. When the rolling operation is completed, the hydraulic cylinder 16 is driven to cause the insertion roll holder 15, which was holding the tip of the insertion roll 14, to retreat upward. After that, the rotating device 13
is driven to rotate the rotary holder 12 90 degrees counterclockwise.

In this state, the above-mentioned loading work of the raw material 1lio and rolling work of the raw material W1 are performed in parallel, and when these works are completed, the rotary holder 12 is rotated 90 degrees counterclockwise.

When the insertion roll 14 changes from a horizontal position to a downward position, the ring product w2 that has been inserted through the horizontal insertion roll 14 on the left side of the rotary holder 12 is automatically pulled out of the insertion roll 14 due to gravity, and the ring product W, transportation takes place naturally.

Then, the heated insertion roll 1 has reached the lowest position.
4 enters the cooling water tank 22 arranged at that location, and enters the cooling water tank 2? It is cooled by the cooling water filled inside. This cooling is performed in parallel with the operations described above.

The insertion roll 14, which has been sufficiently cooled in the cooling water tank 22, rotates once and reaches the loading position of the material W0 again, and repeats the same operation as described above.

It should be noted that this invention is not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the invention.

For example, in the above embodiment, the rotary holder 12 has a cross-shaped shape, but the rotary holder 12 is not limited to this, and may have various shapes.
may be attached at predetermined angles in the radial direction of the rotating holder 12.

Further, if necessary, a cooling water injection nozzle may be provided in the cooling water tank 22, and cooling water may be directly injected from the cooling water injection nozzle onto the heated insertion roll 14 to cool it.

〔Effect of the invention〕

As is clear from the above description, according to the ring rolling mill according to the invention as claimed in claim 1, the work of carrying in and rolling the material and carrying out the product can be carried out simultaneously and in parallel, thereby increasing work efficiency. be able to.

Moreover, since a plurality of insertion rolls are used in severe rolling operations, and both ends of the insertion rolls are supported during rolling, deformation of the insertion rolls during rolling can be minimized. It is possible to prevent early deterioration of the insertion roll and extend the life of the insertion roll. Thereby, it is possible to reduce the work of replacing the insertion rolls, and it is possible to reduce the decrease in rolling work efficiency that is caused by the work of replacing the insertion rolls.

In addition, the insertion roll that protrudes from the rotation holder is periodically turned downward by the rotation holder that rotates in the vertical direction, so the rolled product that is inserted into the insertion roll is at the tip of the insertion roll. When the side is facing downwards, the product will be pulled out naturally from the tip side of the insertion roll due to gravity, making it extremely easy to carry out the product.
It is possible to eliminate the need for special equipment for transporting products.

Further, according to the ring rolling mill according to the invention set forth in claim 2, it has the same effect as the above-mentioned invention set forth in claim 1, and a cooling part for cooling the insertion roll is disposed on the lower side of the rotary holder. As a result, each insertion roll periodically passes through the cooling section on the lower side of the rotation holder due to the rotating holder that rotates in the vertical direction, so that each insertion roll heated during the rolling operation can be easily removed while passing through the cooling section. Moreover, it can be cooled periodically. This makes it possible to prevent early deterioration of the insertion roll due to heating, extend the life of the insertion roll, and reduce the need for replacing the insertion roll. This can be reduced.

[Brief explanation of drawings]

1 and 2 show an embodiment of a ring rolling mill according to the present invention, in which FIG. 1 is a partially cutaway side sectional view of the ring rolling mill, and FIG. 2 is a front view of the main parts. It is. Figures 3 and 4 show a conventional ring rolling mill. Figure 3 (A) is a side view of the conventional ring rolling mill during rolling, and Figure 3 (B) is a side view of the conventional ring rolling mill during rolling. A side view, FIG. 4(A) is a plan view of a horizontal multi-shaft ring rolling mill, and FIG. 4(B) is a sectional view. [Explanation of symbols] 1 Nilling rolling mill 2: Bed 3: Electric motor 4: II hand 5: Reducer 6: Transmission shaft 7: Pressure roll 8: Moving frame 9: Hydraulic cylinder 10: Wheel 1
1: Rotating holder shaft 12: Rotating holder 13: Rotating device 14: Insertion roll 15: Insertion roll holder 16: Hydraulic cylinder 17: Edge roll 18
: Hydraulic cylinder 19: Material carrying table 20: Hydraulic cylinder 21: Material carrying cart 22: Cooling water tank. :Material before rolling 111:Material during rolling-, :
Ring product 31: Bed 32: Vertical main shaft 33: Pressure roll 34: Moving frame 35: Insertion roll
36: Edge roll 37: Hydraulic cylinder 38: Insertion roll upper holder 39: Rolling table 61: Pressure roll 63: Insertion roll W: Material, product 62: Rotating table 64: Holding roll

Claims (1)

[Scope of Claims] 1. A plurality of insertion rolls which are inserted into a hole in a material having a hole in the center and are rotatable in forward and reverse directions are provided protruding at predetermined angles in the radial direction of the rotary holder, and the plurality of insertion rolls are inserted in the radial direction. A rotating holder protruding from the roller is supported so as to be able to rotate forward and backward in the vertical direction, and an insertion roll holder that holds the tip side of the insertion roll during rolling is provided so as to be movable up and down, and rotates the material in cooperation with the insertion roll. A ring rolling mill characterized in that a pressure roll is placed on the upper side of a rotating holder. 2. A plurality of insertion rolls, which are inserted into a hole in a material having a hole in the center and can be rotated forward and backward, are provided protruding at predetermined angles in the radial direction of the rotary holder, and the plurality of insertion rolls are provided protruding in the radial direction. A rotary holder is supported so as to be able to rotate forward and backward in the vertical direction, and an insertion roll holder that holds the tip side of the insertion roll during rolling is provided so as to be movable up and down. A ring rolling mill characterized in that a cooling section for cooling the insertion roll is arranged at the lower side of the rotary holder.