JP2011011243A - Wedge type adjusting mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wedge type adjusting mechanism capable of preventing a wedge from being moved caused by load without providing a fixing manes for fixing the movement of the wedge besides a wedge mechanism.SOLUTION: The wedge type adjusting mechanism 10 for adjusting the position of the upper surface of a lower die MB includes: upper and lower movable members 12, 13; and a lower die holding member 14 for holding the lower die. The lower die holding member 14 includes: a rocking shaft 14b which is arranged so as to be parallel to the upper surface of the lower movable member 12; and a locking arm 14a having the die holding part 14c to which the lower die MB is mounted in the top part. The upper movable member 13 is formed so that the upper surface thereof is made into a cylindrical surface with the axis parallel to the rocking shaft 14b of the lower die holding member 14 as the center axis. On the bottom of the rocking arm 14a, a cylindrical surface having the radius of curvature which is equal to the upper surface of the upper movable member 13 the axis parallel to the rocking shaft 14b of the lower die holding member 14 as the center axis is formed.

Description

  The present invention relates to a wedge type adjustment mechanism.

  In a plate bending press or the like, if the left and right dimensions are large, the molding effect of the molding material located in the center of the bed is reduced due to the deflection of the bed, causing a phenomenon that it cannot be molded into a desired shape. Then, when bending a long molding material such as a plate material, the processing is usually performed in a state where the longitudinal direction of the molding material is aligned with the left-right direction of the press, and therefore, along the longitudinal direction of the molding material. There has been a problem that uniform bending cannot be performed (insufficient molding occurs in the center).

Therefore, as a method of bending the material to be molded uniformly along its longitudinal direction, a method has been proposed in which the bed, that is, the upper surface of the lower mold is horizontal in a state where a load is applied ( For example, Patent Documents 1 to 4).
Specifically, the lower molds arranged on the bed are divided, and a wedge mechanism, a hydraulic cylinder, and the like are provided between each lower mold and the bed upper surface. Then, the bed deflection is predicted or measured in a state of receiving a load (hereinafter referred to as a molding load) that is finally applied when the molding material is molded, and a wedge mechanism or the like is based on the predicted or measured deflection amount. To adjust the height of the upper surface of each lower mold. Then, the upper surface of the lower mold can be leveled when subjected to a molding load. For example, when a molding load is applied, each lower mold is moved upward by the amount of bed deflection predicted at the position of each lower mold. Then, when the molding load is received, the upper surface of the lower mold can be leveled, and a uniform load can be applied even to a long molding material.

However, in a plate bending press or the like that forms a pipe from a plate material, the lower mold is divided into front and rear, and a wedge mechanism is provided between each divided lower mold and the bed (FIG. 4). (See), during molding, a horizontal force is generated with respect to the wedge due to the molding load. When the load is large, the wedge cannot move against the horizontal force, and the wedge may move. When the wedge is moved, the upper surface of the lower mold is shifted from the position where the lower mold was planned when a molding load is applied, and the upper surface of the lower mold cannot be made horizontal. Then, in the case of a long molding material, there exists a problem that it becomes impossible to apply a uniform load with respect to a molding material.
In order to prevent the movement of the wedge, a fixing means for fixing the movement of the wedge may be provided separately from the wedge mechanism, but there is a problem that the structure of the apparatus becomes complicated.

JP 58-184019 A JP 59-144527 A Japanese Patent Application No. 2-142619 Japanese Patent Application No. 8-57543

  SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a wedge type adjustment mechanism that can prevent the movement of the wedge due to the load without providing a fixing means for fixing the movement of the wedge separately from the wedge mechanism. To do.

The wedge-type adjusting mechanism of the first invention is a wedge-type adjusting mechanism for adjusting the position of the upper surface of the lower mold, and the wedge-type adjusting mechanism includes a lower movable member having an upper surface formed on an inclined surface, An upper movable member provided on the upper surface of the lower movable member so as to be slidable along the upper surface of the lower movable member, and a lower mold holding for holding the lower mold disposed on the upper surface of the upper movable member The lower mold holding member includes a swing shaft disposed parallel to the upper surface of the lower movable member, and a distal end having a base end attached to the swing shaft. A swing arm having a mold holding part to which the lower mold is attached. The upper movable member has an upper surface centered on an axis parallel to the swing axis of the lower mold holding member It is formed in a cylindrical surface as an axis, and is in contact with the upper surface of the upper movable member on the lower surface of the swing arm. A cylindrical concave surface is formed, and the cylindrical concave surface has an axis parallel to the swing axis of the lower mold holding member, and a radius of curvature identical to that of the upper surface of the upper movable member. It is formed to have a curvature radius.
According to a second aspect of the present invention, there is provided a wedge-type adjusting mechanism comprising: a base member on which the lower surface of the lower movable member is slidably disposed; and the lower mold holding member swings on the base member. A shaft is attached.
According to a third aspect of the present invention, there is provided a wedge type adjusting mechanism according to the first or second aspect, wherein the wedge adjusting mechanism includes a moving mechanism that moves the lower movable member, and the moving mechanism is located below the swing shaft. It is arranged.

According to the first invention, since the contact surface between the upper movable member and the swing arm is a cylindrical surface, even if the lower movable member is moved, the upper movable member is moved into the lower movable member and the swing arm, respectively. It can be maintained in surface contact. Then, when the lower movable member is moved, the tip of the swing arm can be swung up and down by an amount corresponding to the amount of movement of the lower movable member, so that the position of the upper surface of the lower mold can be adjusted. it can. Moreover, since the horizontal component of the force acting on the lower mold during molding can be supported by the swing shaft via the swing arm, it can be moved upward by the horizontal component even without special holding means. The member can be prevented from moving, and the lower mold can be held in a predetermined position.
According to the second aspect, since all the components of the wedge type adjusting mechanism are arranged on the base member, the positioning of the wedge type adjusting mechanism is facilitated.
According to the third aspect of the present invention, since the device constituting the moving mechanism can be arranged at a position separated from the lower mold by the length of the swing arm, the maintenance of the device can be facilitated.

It is a single-body schematic explanatory drawing of the wedge type adjustment mechanism 10 of this embodiment. It is a schematic sectional drawing of the state which attached the wedge type adjustment mechanism 10 of this embodiment to the plate bending press, (A) is a sectional view of the position where spacer 33 is arranged, and (B) shows cylinder 31. It is sectional drawing of the position which has arrange | positioned. It is a schematic front view of the plate bending press which employ | adopted the wedge type adjustment mechanism 10 of this embodiment. It is a schematic part sectional drawing of the plate bending press which employ | adopted the wedge type adjustment mechanism 10 of this embodiment.

Next, an embodiment of the present invention will be described with reference to the drawings.
The wedge type adjusting mechanism of the present embodiment is a mechanism used for adjusting the position of the lower die of the press, and the position of the lower die is adjusted even if a horizontal force is generated by the force applied to the lower die. It is characterized by a structure that can be reliably maintained.

The press provided with the wedge type adjusting mechanism of the present embodiment is, for example, a press such as a plate bending press or a pipe making press, but any press that needs to adjust the position of the lower mold is used. It can also be used in presses.
Below, the case where it uses for the plate bending press which shape | molds a board | plate material sequentially and shape | molds a large diameter pipe is demonstrated as a representative.

First, a plate bending press provided with the wedge type adjusting mechanism of the present embodiment will be described with reference to FIGS. 3 and 4.
In FIG. 3, symbols B and C indicate the bed and crown of the plate bending press of this embodiment, respectively. Reference numeral T denotes a tie rod that connects the bed B and the crown C.
On the upper surface of the bed B, a plurality of lower molds MB are provided side by side along the width direction of the plate bending press (the left-right direction in FIG. 3).

As shown in FIG. 4, in the plate bending press for forming a large-diameter pipe, each of the plurality of lower molds MB includes two lower molds MB1 and MB2 at the front and rear. The lower molds MB1 and MB2 in the plurality of lower molds MB are arranged such that a gap is formed between them, and the gaps are arranged along the width direction of the plate bending press.
The wedge-type adjusting mechanism 10 according to this embodiment is provided between each lower mold MB and the upper surface of the bed B. The operations of the plurality of wedge type adjusting mechanisms 10 are controlled by control means (not shown).

  As shown in FIG. 4, an upper mold MA is arranged above the plurality of lower molds MB, more specifically, above the gaps between the lower molds MB1 and MB2 in the plurality of lower molds MB. ing. The upper mold MA is one mold extending along the width direction of the plate bending press (left and right direction in FIG. 3). The upper mold MA is attached to the slide S via the plate P.

  As shown in FIGS. 1 and 2, a plurality of urging means D such as a hydraulic cylinder are provided between the slide S and the crown C to move the slide S along the vertical direction. The operations of the plurality of urging means D are controlled by the control means, similarly to the plurality of wedge type adjusting mechanisms 10.

  The plate bending press having such a structure operates as follows to form a plate material, which is a material to be molded, into a large-diameter pipe.

  First, at the time of forming the plate material, the amount of bending downward of the bed B at the position of each lower mold MB in the state of being molded with the load applied when the plate material is finally formed (hereinafter, the amount of bending at the time of forming) Is predicted by the control means, and the plurality of wedge type adjusting mechanisms 10 are operated by an amount corresponding to the predicted amount of deflection, and the plurality of lower molds MB are moved upward. Specifically, the plurality of lower dies MB are moved so that the upper surface thereof becomes a convex surface with the center in the width direction of the plate bending press (the center in the left-right direction in FIG. 3) as the apex.

When the plurality of lower molds MB are moved upward by a predetermined amount, a plate material is disposed between the lower mold MB and the upper mold MA.
When the plate material is disposed, the slide S is moved downward by the urging means D according to a command from the control means 30, and therefore the plate material is urged by the upper mold MA. Then, at the position where each lower mold MB is provided, each of the lower molds MB1 and MB2 and the upper mold MA are in contact with the plate material at three points, so that the plate material is bent (FIG. 4).

When the plate material is bent to a predetermined curvature, the slide S rises and the bending process of the plate material by the upper mold MA is completed. Then, the plate material is moved along the width direction of the plate material by a sizing feed device (not shown) installed before and after the plate bending press (the left-right direction in FIG. 4), and a location different from the previously molded location on the plate material. Is placed between the lower mold MB and the upper mold MA, the plate material is bent in the same manner as described above.
If the bending process and the change of the bending position are repeated, the plate material is eventually formed into a substantially pipe shape.

  Moreover, in the plate bending press, before the plate material is biased by the upper die MA, the plurality of wedge type adjusting mechanisms 10 are adjusted so that the plurality of lower dies MB are positioned upward by the amount of bending during molding. Has been. Then, since the upper surface of the lower mold MB can be leveled in a state where a molding load is received, it is possible to prevent insufficient molding from occurring in a portion located at the center in the width direction of the plate bending press on the plate material. Can do.

(Wedge type adjusting mechanism 10)
Next, the wedge type adjusting mechanism 10 of the present embodiment will be described with reference to FIGS. 1 and 2.
1 and 2, reference numeral 11 denotes a base member of the wedge type adjusting mechanism 10. The base member 11 holds each member of the wedge type adjusting mechanism 10, and each member is disposed on the base member 11. As shown in FIG. 2, the base member 11 is disposed on the upper surface of the bed B and fixed to the bed B by the fixing means 30 when the wedge type adjusting mechanism 10 of the present embodiment is installed in the press. .

  The fixing means 30 only needs to be able to fix the base member 11 to the bed B so that the base member 11 does not move by the pressure applied from the lower mold MB held by the wedge type adjusting mechanism 10, and its structure and fixing method, in particular. It is not limited.

For example, a configuration as shown in FIG.
The fixing means 30 shown in FIG. 2 includes a cylinder 31, a positioning member 32, and a spacer 33.
The cylinder 31 has a rod tip attached to the base end (right end in FIG. 2) of the base member 11 and a cylinder body attached to the bed B, so that its axial direction is parallel to the front-rear direction of the press. It is arranged.
The positioning member 32 is fixed to the upper surface of the bed B. The positioning member 32 has a reference wall 32a erected on the upper surface thereof at an end portion (right end in FIG. 2) located outward from the center in the front-rear direction of the press. The inner surface of the reference wall 32a (the left surface in FIG. 2) is formed in a vertical plane parallel to the press left-right direction.
Further, the spacer 33 is disposed between the positioning member 32 and the base end of the base member 11, and is formed so that the front and rear surfaces (both left and right in FIG. 2) are parallel and flat. ing.
When the fixing means 30 is employed, the base member 11 can be moved in the front-rear direction of the press (left-right direction in FIG. 2) by extending and retracting the cylinder 31. Then, if the spacer 33 is disposed between the positioning member 32 and the base end of the base member 11 and the cylinder 31 is contracted, the base member 11 can be pressed against the inner surface of the reference wall 32a via the spacer 33. Then, the base member 11 can be disposed at a predetermined position with the inner surface of the reference wall 32a as a reference. That is, the position of the base member 11 can be adjusted by adjusting the thickness of the spacer 3.

(Lower movable member 12)
As shown in FIGS. 1 and 2, the upper surface of the base member 11 is formed as a flat surface, and a lower movable member 12 is provided thereon. The lower movable member 12 is formed so that its lower surface is a flat surface and can slide along the upper surface of the base member 11.
The upper surface of the lower movable member 12 is formed to be a flat surface and an inclined surface inclined along the front-rear direction of the press. Specifically, the lower movable member 12 has a thickness of an end portion located outward with respect to the center in the front-rear direction of the press (the right end in FIGS. 1 and 2, hereinafter simply referred to as one end of the lower movable member 12). A wedge-like shape whose upper surface is inclined so as to be thicker than the thickness of the end portion (the left end in FIGS. 1 and 2, hereinafter simply referred to as the other end of the lower movable member 12) located on the center side in the longitudinal direction of the press. It is a member.

(Movement mechanism 20)
Between the one end of the lower movable member 12 and the base member 11, a moving mechanism 20 that moves the lower movable member 12 along the front-rear direction of the press is provided.
The moving mechanism 20 includes a servo motor 21 fixed to the base member 11 and a screw shaft 22 connected to the main shaft of the servo motor 21. The screw shaft 22 is formed at one end of the lower movable member 12. It fits into the tapped screw hole 12h. The main shaft of the servo motor 21, the central axis of the screw shaft 22, and the central axis of the screw hole 12h are all located on the same axis and arranged in parallel with the front-rear direction of the press.
For this reason, if the servomotor 21 is operated and the screw shaft 22 is rotated, the lower movable member 12 can be advanced and retracted along the axial direction of the screw shaft 22. Moreover, if the operation of the servo motor 21 is stopped, the movement of the lower movable member 12 can be fixed.

  The moving mechanism 20 is not limited to the screw mechanism as described above, and may be any mechanism that can move the lower movable member 12 along the front-rear direction of the press and can fix the movement. For example, a screw jack or an electric cylinder can be employed.

(Upper movable member 13)
As shown in FIGS. 1 and 2, an upper movable member 13 is provided on the upper surface of the lower movable member 12. The upper movable member 13 is formed so that its lower surface is a flat surface and can slide along the upper surface of the lower movable member 12.
The upper movable member 13 has an upper surface formed in a cylindrical surface. Specifically, it is formed to be a cylindrical surface having a central axis parallel to the upper surface of the lower movable member 12 and parallel to the horizontal direction of the press.

(Lower mold holding member 14)
As shown in FIGS. 1 and 2, a swing arm 14 a of the lower mold holding member 14 is disposed on the upper surface of the upper movable member 13.
A mold holding part 14c is provided on the top surface of the tip of the swing arm 14a, and a lower mold MB2 is attached.
On the other hand, the base end of the swing arm 14a is swingably attached to the swing shaft 14b. The swing shaft 14b is fixed to a base wall surface 11b standing on the upper surface of the base member 11. The pivot shaft 14b is disposed so that the central axis thereof is parallel to the upper surface of the lower movable member 12 and parallel to the left-right direction of the press. That is, the swing shaft 14b is disposed so as to be parallel to the central axis of the upper surface (cylindrical surface) of the upper movable member 13.
A cylindrical concave surface 14d that is engaged with the upper surface of the upper movable member 13 is formed on the lower surface of the tip of the swing arm 14a. The cylindrical concave surface 14d is formed so that its central axis is parallel to the central axis of the swing shaft 14b and its radius of curvature is the same as that of the upper surface of the upper movable member 13. For this reason, the cylindrical concave surface 14d is engaged so as to come into surface contact with the upper surface of the upper movable member 13.

With the above configuration, when the lower movable member 12 is moved in the front-rear direction of the press by the moving mechanism 20, the upper surface of the upper movable member 13 and the cylindrical concave surface 14d of the swing arm 14a are engaged. Therefore, the upper movable member 13 can move only slightly in the front-rear direction of the press. For this reason, the upper movable member 13 moves up and down according to the height of the upper surface of the lower movable member 12.
At this time, the central axis of the swing shaft 14b, the central axis of the cylindrical concave surface 14d, and the central axis of the upper surface of the upper movable member 13 are all parallel, and the cylindrical concave surface 14d and the upper surface of the upper movable member 13 are all Since it is a cylindrical surface, the upper movable member 13 moves up and down while the lower surface thereof is in surface contact with the upper surface of the lower movable member 12 and the upper surface and the cylindrical concave surface 14d are in surface contact.
Then, when the lower movable member 12 is moved, the upper movable member 13 moves up and down by an amount corresponding to the amount of movement of the lower movable member 12, and by an amount corresponding to the amount of vertical movement of the upper movable member 13, Since the tip of the swing arm 14a swings up and down, the position of the upper surface of the lower mold MB2 can be accurately adjusted. If the movement of the lower movable member 12 is fixed by the moving mechanism 20, the position of the lower mold MB2 can be fixed at a predetermined position.

In addition, as shown in FIG. 2, when a plate forming force is applied to the lower mold MB2, the horizontal component force (force in the front-rear direction of the press, hereinafter horizontal component force) is caused by this force. The horizontal component force is applied to the swing shaft 14b via the swing arm 14a. For this reason, since the horizontal component force can be supported by the swing shaft 14b, the upper movable member 13 can be prevented from moving.
In addition, a force to move the upper movable member 13 along the upper surface of the lower movable member 12 is also generated by a vertical component force (hereinafter referred to as a vertical direction) caused by the force, but the cylinder of the swing arm 14a is generated. Since the concave surface 14d and the upper surface of the upper movable member 13 are engaged, this force can also be supported by the swing shaft 14b via the swing arm 14a, thereby preventing the upper movable member 13 from moving. be able to.

  Therefore, if the wedge type adjusting mechanism 10 of the present embodiment is provided, even when a force that moves the upper movable member 13 is generated due to the force for forming the plate material, the force is supported by the swing shaft 14b. can do. In other words, even if there is no special holding means, the movement of the upper movable member 13 along the upper surface of the lower movable member 12 can be prevented by the swing shaft 14b, so that the position of the lower mold MB2 is set to a predetermined position. You can keep it.

  As shown in FIGS. 1 and 2, in the case of the wedge type adjustment mechanism 10 of the present embodiment, a space can be provided between the swing shaft 14 b and the base member 11. Then, if the moving mechanism 20 is arranged in this space, the apparatus constituting the moving mechanism 20 can be arranged at a position away from the lower mold MB2 by the length of the swing arm 14a. In addition, since the upper movable member 13 is prevented by the swing shaft 14b, a wall surface provided to fix the movement across the both ends of the upper movable member 13 as in a normal wedge mechanism becomes unnecessary. Therefore, since the space can be made open to the outside, the maintenance of the device is facilitated.

  Note that a guide or the like for guiding the base member 11 in the longitudinal direction of the press may be provided between the base member 11 and the base B. In this case, it is preferable because the base member 11 can be reliably moved along the front-rear direction.

  Further, a guide or the like for guiding the upper movable member 13 in the longitudinal direction of the press may be provided between the lower movable member 12 and the upper movable member 13. In this case, the upper movable member 13 can be reliably moved along the longitudinal direction of the press, which is preferable.

  Furthermore, if the lower movable member 12 can be slidably disposed on the upper surface of the base B and the moving mechanism 20 and the swing shaft 14b can be directly fixed to the base B, the base member 11 need not be provided. . However, if the base member 11 is configured as described above, all the components of the wedge type adjustment mechanism 10 can be disposed on the base member 11, so that the wedge type adjustment mechanism 10 can be simply moved by moving the base member 11. Can be adjusted. Then, there is an advantage that the wedge type adjusting mechanism 10, that is, the lower mold MB2 can be easily aligned in the front-rear direction.

  The wedge type adjusting mechanism of the present invention is suitable for position adjustment of a lower mold in a plate bending press for forming a long plate material into a large-diameter pipe or a pipe making press.

DESCRIPTION OF SYMBOLS 10 Wedge type adjustment mechanism 11 Base member 12 Lower movable member 13 Upper movable member 14 Lower mold holding member 14a Oscillating arm 14b Oscillating shaft 14c Mold holding part 20 Moving mechanism B Bed C Crown D Energizing means P Plate S Slide MA Upper mold MB Lower mold

Claims (3)

A wedge type adjustment mechanism for adjusting the position of the upper surface of the lower mold,
The wedge type adjusting mechanism is
A lower movable member whose upper surface is formed as an inclined surface;
An upper movable member provided on the upper surface of the lower movable member so as to be slidable along the upper surface of the lower movable member;
A lower mold holding member that is disposed on the upper surface of the upper movable member and holds the lower mold; and
The lower mold holding member is
A swing shaft disposed so as to be parallel to the upper surface of the lower movable member;
A rocking arm having a base end portion attached to the rocking shaft and having a mold holding portion to which the lower mold is attached to a distal end portion;
The upper movable member is
The upper surface is formed in a cylindrical surface having an axis parallel to the swing axis of the lower mold holding member as a central axis,
A cylindrical concave surface that is in surface contact with the upper surface of the upper movable member is formed on the lower surface of the swing arm,
The cylindrical concave surface is
A wedge characterized in that its central axis is an axis parallel to the swing axis of the lower mold holding member, and its radius of curvature is the same as that of the upper surface of the upper movable member. Formula adjustment mechanism. A lower member of the lower movable member is provided with a base member slidably disposed;
2. The wedge type adjusting mechanism according to claim 1, wherein a swing shaft of the lower mold holding member is attached to the base member. The wedge adjustment mechanism is
A moving mechanism for moving the lower movable member;
The moving mechanism is
The wedge-type adjusting mechanism according to claim 1, wherein the wedge-type adjusting mechanism is disposed below the swing shaft.