JPH06104258B2 - Multi-axis table mill - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-screw table mill, and more particularly to a multi-screw table mill capable of automatically measuring its outer diameter, wall thickness and the like during forging of a material. The present invention relates to a shaft type table mill.

2. Description of the Related Art Here, a multi-screw table mill refers to a main roll that rotates a metal ring-shaped material around a vertical axis and a horizontal table that rotates eccentrically with respect to the axis of the main roll. In addition, it is a forging device for forming a ring-shaped product by rolling from inside and outside between one of several middle rolls arranged at a distance from the main roll. .

Now, a conventional table mill of this type will be described with reference to the drawings. As shown in a plan view of FIG. 3 of the accompanying drawings, one vertical main shaft 2 is rotatable on a bed 1. The main shaft 2 is attached to a speed reducer or a reduction gear 7 installed on the bed 1, and the input shaft of the speed reducer 7 is similarly connected to the bed 1 via a shaft coupling 8. Connected to the electric motor 9 installed on the
It is designed to be driven to rotate by. Further, a ring-shaped main roll 3 is fixed to the main shaft 2 so as to be coaxial with the main roll 3, and further, the main roll 3 is surrounded around the main roll 3 with a space therebetween. A rotary table 4 having a central opening is horizontally rotatably arranged, and the rotary shaft center of the rotary table 4 is eccentric to the rotary shaft center of the main shaft 2. Further, at least four middle rolls 5 and four holding rolls 6 are provided on the rotary table 4, and the distance between the middle roll 5 and the main roll 3 is equal to the rotary table. Four
However, since the rotary table 4 is eccentrically arranged with respect to the main shaft 2 and becomes gradually narrower when the rotary table 4 relatively rotates with respect to the main shaft 2, the distance between the two rolls 3 and 5 is relatively large. When the ring-shaped material W is loaded onto the rotary table 4 so that the opening formed in the center thereof surrounds the intermediate roll 5 when the relative position shown by A in FIG. Arrow X relative to main shaft 2
The material W is gradually rolled between the main roll 3 and the middle roll 5 as it rotates in the direction of, and is finished when it reaches the position B where the distance between the both rolls 3 and 5 is minimum. , Rolled product W ₀ . However, in this case, since the rotary table 4 supporting the intermediate roll 5 and the holding roll 6 rotates around the main shaft 2, it is extremely difficult to detect the dimension of the material W during molding, and therefore, usually, The size of the material W is not detected during forming, and the mounting position of the intermediate roll 5 on the rotary table 4 cannot be changed. The present situation is to press and roll so that the dimensions are determined by the amount of eccentricity of the table 4. However, according to such a rolling method, if there is a difference in weight or size between the ring-shaped materials W themselves, even if the thickness of the rolled product is the same,
There is a drawback that the outer diameter dimension varies, and a rolled product having a highly accurate dimensional tolerance cannot be obtained.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Therefore, in the present invention, i) the dimensional accuracy of rolled products is good, ii) automatic operation is possible, and iii) mechanical, hydraulic, or electrical control is possible. It is an object of the present invention to obtain a new multi-screw table mill capable of satisfying all the various requirements such as

Means for Solving the Problems In order to achieve this object, the present invention provides a first embodiment of the accompanying drawings.
As shown in the drawing, a vertical main shaft 2 is rotatably mounted on a bed 1, a main roll 3 can be mounted on the main shaft 2, and a central opening is provided to surround the main roll 3 at intervals. The rotary table 4 is eccentrically arranged with respect to the axis of the main shaft 2 and rotatably arranged horizontally. On the rotary table 4, several medium rolls 5 are rotatable at substantially equal intervals on the same circumference. The movable table 14 is attached to the outside of the outer periphery of the rotary table 4 at a distance from the outer periphery of the rotary table 4 so as to be rotatable about the axis of the main shaft 2, and on the movable table 14. , A measuring rod 15 having a sizing roller 20 mounted rotatably around a vertical axis at its inner end is horizontally mounted such that its longitudinal center line is movable substantially in the radial direction of the spindle 2. The rod 15 is constantly pressed toward the spindle 2. It features a multi-screw table mill that is designed to be placed in.

EXAMPLES The present invention will be described in detail below with reference to FIGS. 1 and 2 of the accompanying drawings showing an example thereof.

As shown in FIGS. 1 and 2, in a multi-screw table mill according to the present invention, a main shaft 2 is rotatably mounted vertically on a bed 1, and a main roll 3 can be fixed to the main shaft 2. Further, the rotary table 4 having a central opening surrounding the main roll 3 at a distance is arranged eccentrically with respect to the rotation axis of the main shaft 2 and horizontally. It is rotatable by a hydraulic cylinder or an electric motor (not shown). On the rotary table 4, at least four medium rolls 5 are arranged radially from the axis of the rotary table 4 and rotatably at equal intervals in the circumferential direction. In this case, the axis of the rotary table 4 is eccentrically arranged in the horizontal direction with respect to the axis of the main shaft 2, and the central opening thereof surrounds the main roll 3 which is fixed to the main shaft 2 with a space therebetween. Therefore (the central opening is not shown in FIG. 1), the distance between the outer peripheral surface of the main roll 3 and the outer peripheral surface of the middle roll 5 depends on the rotational position of the rotary table 4. Although different, in the case of the present embodiment, the axis of the rotary table 4 is the first on the straight line connecting the axis of the rotary table 4 and the axis of the main shaft 2.
It is assumed to be at the position A on the left side in the figure, and therefore,
At this position A, the distance between the outer peripheral surfaces of the middle roll 5 and the main roll 3 is the largest. In addition, each one of the holding rolls 6 cooperating with each of the middle rolls 5 has one end around the vertical axis so that each of the holding rolls 6 is elastically pressed onto the rotary table 4 toward each of the middle rolls 5. the other end of the pivotally mounted horizontal lever ₆₁ is mounted rotatably. The main shaft 2 is connected to a reduction gear or reduction gear 7 installed on the bed 1, and its input shaft is
It is likewise connected via a shaft coupling 8 to an electric motor 9 installed on the bed 1 and, in this way, the spindle 2
Are driven to rotate by the electric motor 9 via the speed reducer 7. The middle roll 5 is adapted to rotate with the material W when the material W is driven to rotate by the main roll 3 without being rotationally driven by another power source. Further, each of the middle rolls 5 can be positioned horizontally in the radial direction by the positioning device 10 attached to the lower surface of the table 4. For this reason, each of the middle rolls 5 is attached to the positioning device 10. The rotary table 4 is driven by the hydraulic or pneumatic cylinder 11.
In the radial direction of (2nd
See figure).

Here, the positioning device 10 having such a configuration
Depending on the desired thickness of the molded product or rolled product, the gap between the outer peripheral surfaces of the main roll 3 and the middle roll 5 at the rolling end position (position opposite 180 ° to position A in FIG. 1) is set. ,
Determining is its main function. That is, there are various sizes of rolled products, and their thicknesses are also different. Therefore, the main roll 3 having the same outer diameter
When rolling rolled products with various wall thicknesses using the medium roll 5 and these two rolls 3, 5 depending on the wall thickness.
The spacing between the outer surfaces of the must be changed. In this case, the hydraulic or pneumatic cylinder 11 of the positioning device 10,
By moving the middle roll 5 in the radial direction by means of a stopper (not shown) that is attached to it and adjusted, it is possible to change the distance from the outer peripheral surface of the main roll 3. A hydraulic or pneumatic cylinder
11 is constantly pressed during the rolling operation, and prevents the intermediate roll 5 from expanding the distance between the intermediate roll 5 and the main roll 3 due to the rolling reaction force.

Further, as shown in FIG. 2, outside the outer periphery of the rotary table 4, a circle centered on the axial center of the main shaft 2 having a certain height in the radial direction from the outside. An arc-shaped support member 12 is fixed to the bed 1, and the support member 12
A guide plate 13 having a width in the radial direction and also having a partially arcuate planar contour centered on the axis of the main shaft 2 is fixed to the top of the guide plate 13. A moving table 14 is mounted on the guide plate 13 so as to be movable relative to the guide plate 13. Although the moving table 14 is not shown in detail in the drawing, for example, the moving table 14 has a total of 6 positions, one each on the inner and outer arc-shaped side surfaces of the guide plate 13 and two positions on the upper and lower surfaces thereof. It is held by a rotatable support roller attached to the guide plate 13 so as to be relatively movable relative to the guide plate 13. 1, the guide plate 13 is a straight line connecting the spindle 2 and the rotary table 4 and extending in the direction opposite to the position A, and the rotation direction of the rotary table 4 from this straight line. It extends between X and the radiation passing through the axis of the main shaft 2 which encloses an angle of about 45 ° in the opposite direction. The upper surface of the moving table 14 is a horizontal plane which is substantially flush with the upper surface of the rotary table 4, and is long so as to have a center line on the radiation passing through the axis of the main shaft 2. A measuring rod 15 having a length is arranged, which measuring rod 15 is mounted at the upper part of the moving table 14 so that one end thereof is pivotably attached by pins 16 ₁ , 17 ₁ and is parallel to each other. The pair of links (A) 16 and (B) 17 which are spaced apart from each other are horizontally attached to the other ends of the links by pins 16 ₂ and 17 ₂ respectively. At the radially inner end of this measuring rod 15,
A horizontal sizing roller 20 for detecting the outer diameter of the product is mounted rotatably around a vertical axis. The links (A) and (B) 16, 17 and the measuring rod 15 and the moving table 14 form a parallelogram link. Further, the link (B) 17 radially outward of the main shaft 2 of the links (A) 16 and (B) 17 is longer than the link (A) 16 inward, At the other end, move table via pin 21
The end of the piston rod 22 ₁ of the installed hydraulic or pneumatic cylinder 22 on the 14, are pivotally connected. In this way, the measuring rod 15 is actuated by the cylinder 22 so that the measuring rod 15, the link (A) 16, the link (B) 17 and the moving table are moved.
Via a parallelogram link formed by 14
It is possible to move in the radial direction. It should be noted that the sizing roller 20 is designed not to be rotationally driven but to move following it when it comes into contact with the material W being rolled or the rolled product.

Further, a hook 25 having a substantially L-shaped plane contour is provided at a lower portion of the moving table 14 in a direction of a tangent to the outer periphery of the rotary table 4 of one of the leg members. One end is pivotally attached to the movable table 14 by a pin 25 ₁ , and this hook 25 is
At the bent portion, the piston rod 26 _{1 of} the hydraulic or pneumatic cylinder 26 attached to the lower part of the moving table 14
The other leg portion, which is attached to the end of the rotary table 4 via a pin 27 so as to be rotatable, faces the rotary table 4 at the lower portion of the rotary table 4 in a circle corresponding to the position of the intermediate roll 5. To the closest of at least four fixing hooks 30 fixed so as to project at equal intervals in the direction.
It is engageable when 26 is activated. The moving table 14 is always moved from the position shown by the solid line in FIG.
It is stationary at the standby position, which is rotated about 45 degrees clockwise,
Further, in this standby position, the moving hook 25 is in a standby state in which it is not engaged with the fixed hook 30 provided so as to project from the outer periphery of the rotary table 4 by the operation of the cylinder 26. The cylinder 26 is operated in synchronization with the rotation of the rotary table 4, and the rotary table 4 sequentially rotates in the direction of the arrow X from the feeding position A of the material W, and from the periphery thereof. The fixed hook 30 protruding
When the position of the movable hook 25 is reached, the cylinder 26 operates and the movable hook 25 projects into the movement path of the fixed hook 30,
Both hooks 25, 30 engage each other, which causes the moving table 14 to rotate with the rotary table 4 in the direction of arrow X at the same speed. At the same time, the operation of the cylinder 22 installed on the moving table 14 causes the measuring rod to move.
The sizing roller 20 rotatably attached to the end of the measuring rod 15 facing the shaft center of the main shaft 2 is such that the measuring roller 15 is pressed toward the shaft center of the main shaft 2. Four
The outer diameter of the raw material W being rolled / formed between the main roll 3 and the middle roll 5 is measured and the outer diameter of the raw material W is measured. In this rolling state, the rotary table 4 further continues to rotate in the direction of the arrow X, and the position of the rolled product W ₀ is shown in FIG. 1 where the distance between the main roll 3 and the middle roll 5 is minimized. When the state is reached, it ends. In addition, the outer diameter of the product at this time is accurately measured by the sizing roller 20.

Each Body roll 6, on the rotary table 4, the one end portion rotatably attached to the other end of the pivotally mounted horizontal levers ₆₁ a, and each embrace rolls 6 , One for each of the middle rolls 5, and has a role of holding the material W between the main rolls 3 and the middle rolls 5 while rolling the material W between the rolls 3, 5. There is no rotation drive in itself,
It follows the material W.

The device of the present invention has the above-mentioned configuration, and its operation is as follows.

In FIGS. 1 and 2, the material W, which has been pre-drilled in the center, is placed on the rotary table 4 at the position A where the center of the rotary table 4 is most spaced from the axis of the spindle 2. , The middle roll 5 attached to it
Then, insert so that the hole in the center part passes through. This material W is
As the rotary table 4 rotates in the direction of the arrow X, the clearance formed between the middle roll 5 and the main roll 3 gradually increases because the rotary table 4 is eccentrically arranged with respect to the main shaft 2. By narrowing, it will be rolled. That is, more specifically, since the axis of the rotary table 4 is biased toward the material feeding position A shown in FIG. 1 with respect to the axis of the main shaft 2, the rotary table 4 is
As the shaft rotates around the axis in the direction of arrow X, the outer peripheral surface of the middle roll 5 mounted movably in the radial direction through the positioning device 10 and the main roll 3 mounted on the spindle 2. The distance from the outer peripheral surface is minimum at a position 180 ° opposite to the material feeding position A. As described above, in the material W that has been charged into the middle roll 5 at the material charging position A, the distance between the outer peripheral surface of the main roll 3 and the outer peripheral surface of the middle roll 5 is the wall thickness of the material W, that is, ( Material outer diameter-material inner diameter) / 2, and therefore material W
Is not rolled in this position. However, as the rotary table 4 continuously rotates in the direction indicated by the arrow X in FIG. 1, due to the eccentric arrangement of the axis of the rotary table 4 with respect to the axis of the main shaft 2, the outer peripheral surface of the main roll 3 and the intermediate roll 5 are eccentrically arranged. The distance between the outer peripheral surface and the outer peripheral surface becomes gradually smaller. In this way, only when the distance between the outer peripheral surfaces of both rolls 3 and 5 becomes equal to the thickness of the material W,
When the rolling of the raw material W is started and the rotary table 4 is further rotated, the raw material W is divided into the main roll 3 and the middle roll 5 by two.
Due to the pressure received from the outer peripheral surface of each roll, its thickness gradually decreases, and the reduced volume is converted into an increase in the outer diameter of the material W. In this way, when the rotary table 4 reaches the position where the molded product or rolled product W ₀ is shown in FIG. 1 rotated 180 ° from the material feeding position A, the outer peripheral surfaces of both rolls 3 and 5 are Since the space between them is the narrowest,
At this position, the rolling operation is completed and the rolled product W ₀ is obtained. In the middle of rolling, the movable table 14 arranged outside the rotary table 4 is fixed by the fixed hook 30 fixed to the outer periphery of the rotary table 4 by the operation of the cylinder 26 attached to the movable table 14. By engaging with one leg member of a hook 25 pivotally mounted on the moving table 14, they are rotated together in the direction of arrow X. At the same time, the center line of the sizing bar 15 in the longitudinal direction is placed in alignment with the radiation passing through the axis of the main shaft 2. Then, the outer diameter of the molded product at this position, the sizing roller 20, by contacting the molded product by the operation of the cylinder 22 or the like, for example, electrically detected,
When the value preset by the setter is reached,
A signal is generated to move the middle roll 5 to a hydraulic or pneumatic cylinder
When the outer diameter is measured, the sizing roller 20 is moved horizontally in the direction opposite to the rolling direction and the outer diameter of the sizing roller 20 is moved in the direction opposite to the axis of the main shaft 2 by the operation of the hydraulic or pneumatic cylinder 22. Also, at the same time, the hook 25 that was synchronizing the moving table 14 supporting the sizing roller 20 with the rotary table 4 is engaged with the fixed hook 30 fixed to the rotary table 4 by the operation of the cylinder 26. At the same time, the moving table 14 is returned to the standby position by the operation of the hydraulic or pneumatic cylinder. Then, the molded product is taken out from the intermediate roll 5, and the molding is completed. In the above description of the operation of the present invention, the rolling of the ring-shaped material W is said to be completed when it is rotated 180 ° from the material feeding position A,
When rolling is always completed at this position, the outer diameter of the molded product W ₀ varies depending on the original size of the ring-shaped material W, and a ring-shaped molded product W ₀ having a constant outer diameter dimension is obtained. Sometimes there is not. This is because the weight (volume) of the ring-shaped material W is generally not constant at the stage of forming the ring-shaped material W (it is normally made to have a large size for safety). When rolling is performed so that the thickness of the ring-shaped material W at the stage becomes constant,
This is because the volume difference of the ring-shaped material W appears as a change in the outer diameter and the inner diameter. Therefore, the outer diameter of the ring-shaped material W is measured by the sizing roller 20 during rolling, and the outer diameter of the ring-shaped material W is determined at a position in front of the final rolling position rotated 180 ° from the material feeding position A. When the size reaches, the pressurization of the hydraulic or pneumatic cylinder 11 of the positioning device 10 is stopped, the pressurization is applied in the opposite direction, and the intermediate roll 5 is operated so as to be separated from the main roll 3, so that no further rolling is performed. To

In this embodiment, since the middle rolls 5 are installed on the rotary table 4 at an angle of 90 ° in the circumferential direction at four equal intervals, each time the rotary table 4 rotates 90 °. Then, the molding of one product is completed. That is, a typical work sequence in this embodiment is displayed as follows.

Loading the material W onto the rotary table 4 → rotary table 4
Rotation → start rolling of the material W → approaching the sizing roller 20 → rolling completion → returning the intermediate roll 5 to the standby position → returning the sizing roller 20 to the standby position → removing the rolled product.

EFFECTS OF THE INVENTION Since the present invention has the above-described configurations and operations, it is possible to exhibit the following effects. That is, 1) rolling is performed while measuring the outer diameter of the product, so that highly accurate product can be stably produced. 2) It has at least four medium rolls, and can carry in and out the punching material. You can perform a series of work at the same time,
Moreover, since the rotary table can be continuously rotated in the same direction to perform the work, high productivity can be obtained. 3) The work can be easily automated.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a multi-screw table mill according to the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a plan view showing an example of a conventionally known mill of this type. 1 …… table, 2 …… spindle, 3 …… main roll, 4 ……
Rotating table, 5 ... Medium roll, 6 ... Hugging roll, 7
...... Reducer, 8 …… Coupling, 9 …… Motor, 10 …… Positioning device, 11 …… Positioning cylinder, 14 …… Movable table, 15 …… Measuring rod, 16 …… Link, 20 …… Sizing roller ,
22 …… Measuring cylinder, 25 …… moving hook, 26 …… moving cylinder, 30 …… fixing hook.

Claims (7)

[Claims] 1. A vertical main shaft, to which a main roll is freely fixed, is rotatably mounted on a bed, and
A rotary table having a central opening that surrounds the main rolls at intervals is eccentrically arranged with respect to the main shaft and rotatably arranged horizontally, and on the rotary table, a radial direction is provided from the center of the rotary table. Several medium rolls are rotatably arranged on the same circumference at substantially equal intervals in the circumferential direction on the same circumference. Further, on the rotary table, one medium roll is used in cooperation with each medium roll. In a multi-spindle type table mill in which a holding roll is rotatably arranged so as to be elastically pressed toward each middle roll, each middle roll is a rotary table, and the corresponding radial direction of the axis of the main shaft Mounted on each of the positioning devices movably arranged on the rotary table, and on the outer periphery of the rotary table, a movable table is arranged together with the rotary table so as to be rotatable about the center of the spindle. On the moving table, there is a measuring rod on the inner end of which a sizing roller is horizontally attached so as to be rotatable around a vertical axis. The multi-axis table mill is characterized in that the measuring rod is attached so that it is always pressed against the spindle. 2. The multi-axis table mill according to claim 1, wherein the rotary table is rotationally driven from a prime mover installed on the bed via a speed reducer or the like. 3. A positioning device comprises a hydraulic or pneumatic cylinder for moving the intermediate roll and its piston rod adapted to be connected to the intermediate roll, the piston rod being directed in the direction toward the axis of the main shaft. The multi-screw table mill according to claim 1 or 2, which is arranged. 4. A horizontal arc shape centered on the axis of the main shaft, wherein the moving table is arranged around the axis of the main shaft so as to surround the rotary table on the bed at intervals. The multi-screw table mill according to claim 1, 2 or 3, which is movably supported in the circumferential direction of the rotary table on a guide plate formed of the plate member of FIG. 5. A fixed hook is fixed to the outer peripheral portion of the rotary table so as to project so as to correspond to the position of each middle roll, so that the movable table can be rotated together with the rotary table.
The multi-axis table mill according to any one of claims 1 to 4, wherein the movable table is provided with a movable hook that is engageable with the fixed hook. 6. A movable hook is formed to have a substantially L-shaped plane contour, one leg member of which is engageable with a fixed hook fixed to a rotary table, and the other leg member is movable table. The multi-spindle table mill according to claim 5, which is connected to a piston rod of a hydraulic or pneumatic cylinder installed in the table mill. 7. A measuring rod having a longitudinal center line horizontally mounted on a moving table so as to be movable in a substantially radial direction of a main axis, and horizontally arranged in parallel at a distance on the moving table. The free ends of two pivotally mounted links are pivotally connected to each other, and a parallelogram link is formed by a measuring rod, two links and a moving table, and the links are moved. The multi-axis table mill according to any one of claims 1 to 6, wherein the multi-axis table mill is movable via a piston of a hydraulic or pneumatic cylinder attached to the table.