JPH0340426Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a flaring press that is installed in a production line for vehicle disc wheels and expands both ends of a cylindrical wheel rim material in the axial direction. , relates to a mold position adjustment position that allows fine adjustment of the mold position without using shims or the like for thickness adjustment.

[Conventional technology] On a manufacturing line for vehicle disc wheels, a plate material is cut to a fixed size, rolled into a cylindrical shape, butt welded at the butt portions, and then sent to a flaring press to widen the ends. The rim shape is created through multiple stages of molding, and then the disc is inserted.
Weld it and send it to the painting process to create a finished product.

In a flaring press, a substantially cone-shaped mold is pressed against the inner circumferential side of the workpiece from both axial sides of the workpiece, which is a cylindrical rim material, to widen both ends of the workpiece. The mold is attached to a mold support stand, and the driving force of the hydraulic cylinder is transmitted to the mold support stand via a link mechanism to move the mold forward and backward with respect to the workpiece, thereby expanding the ends of the workpiece. When manufacturing disc wheels for different car models, the diameter and axial length of the workpiece change, so the mold must be replaced each time. Conventionally, in order to position the distance between the center of the workpiece and the mold to the dimensions seen in front, the mold was attached to a mold support via shims, and the thickness of the shim was adjusted.

[Problems that the invention aims to solve] However, adjusting the mold position using shims requires removing the mold from the mold support each time the shim is changed, which is a difficult task that requires a lot of time and manpower. It was becoming.

An object of the present invention is to provide a mold position adjustment device for a flaring press that allows fine adjustment of the mold position without using shims.

[Means for Solving the Problems] A mold position adjustment device for a flaring press according to the present invention to achieve the above object presses a mold against a cylindrical workpiece from both sides in the axial direction to expand the end of the workpiece. In a flaring press to be opened, a mold mounting block for mounting and supporting the mold is provided so as to be movable relative to the workpiece, and a connecting shaft having first and second shaft supports whose shaft centers are offset from each other is connected to the mold mounting block. A link rotatably connected to the mold mounting block at the first shaft support and transmitting force from the driving means to the mold mounting block via the connecting shaft is provided at the second shaft support. A locking mechanism is rotatably connected to the connecting shaft and is provided between the mold mounting block and the connecting shaft to lock or unlock relative rotation between the mold mounting block and the connecting shaft. consists of things.

[Operation] In the above device, the mold is moved toward and away from the workpiece by the driving means via the link, the connecting shaft, and the mold mounting block, thereby flaring the workpiece. When the type of workpiece changes, the mold is replaced with a corresponding one. When fine-tuning the mold position after replacing the mold,
The lock mechanism is unlocked to allow the connecting shaft to rotate relative to the mold mounting block. As a result, since the axes of the first and second shaft supports of the connecting shaft are offset, the relative position of the mold mounting block and the link changes, and the position of the mold relative to the link position changes. The initial position also changes. When the distance between the pair of molds reaches a predetermined distance, the rotation of the connecting shaft is stopped, and the locking mechanism is then locked to fix the connecting shaft and the mold mounting block to each other. Through the above steps, the fine adjustment of the mold position is completed. For this adjustment, there is no need for shims that are interposed between the mold and the mold mount as in the past, and the fine adjustment is easier than with the shim type, and it is stepless adjustment. .

[Example] Hereinafter, a preferred example of the mold adjustment position of the flaring press according to the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, W indicates a cylindrical workpiece having a weld extending in the axial direction,
It consists of cylindrical rim rough material manufactured in the rim welding process of the vehicle disc wheel production line. On both sides of the cylindrical workpiece W in the axial direction, molds 1 and 2 are arranged so as to be movable relative to the workpiece W. The molds 1 and 2 are directly fixed to the mold mounting blocks 3 and 4 with bolts or the like without using shims. The mold mounting blocks 3 and 4 are slidable on the press frame 15 by sliding portions 3a and 4a, and are supported so as to be movable in the axial direction of the workpiece W. The mold mounting blocks 3, 4 are connected to push arms 5, 6 via connecting shafts 7, 8. The push arms 5 and 6 are connected to link mechanisms 9 and 10,
The push arm 5 and the link mechanism 9 are arranged on one side of the left and right sides of the work W, and the push arm 6 and the link mechanism 10 are arranged on the other side of the left and right sides of the work W, and both are connected by a connecting link 11. connected. The push arms 5, 6 cooperate with the link mechanisms 9, 10 to form part of the link. push arm 5,
6 are interlocked by the connecting link 11, so that the molds 1 and 2 are simultaneously pushed onto the workpiece W, or the molds 1 and 2 are simultaneously separated from the workpiece W. This drive is performed by a hydraulic drive cylinder 12.
When the hydraulic cylinder 12 is in the position indicated by the solid line in the figure, the push arms 5 and 6 press the molds 1 and 2 against the workpiece W to expand the ends of the workpiece W, and the hydraulic cylinder 1
2 is at the position indicated by the two-dot chain line in the figure, the push arms 5 and 6 move the molds 1 and 2 away from the workpiece W.

As shown in FIG. 2, the connecting shafts 7, 8 are connected to the axis A of the first shaft supports 7a, 8a which are the shaft supports with the mold mounting blocks 3, 4, and the pusher shafts forming part of the link. The axes B of the second pivot supports 7b, 8b, which are pivot supports with the arms 5, 6, are offset from each other by a distance d. When the connecting shafts 7, 8 rotate, the relative positions of the mold mounting blocks 3, 4 and the push arms 5, 6 can be changed in the radial direction by an appropriate amount in the range of 0 to 2d due to the offset. In Fig. 2, when the connecting shafts 7 and 8 are rotated once, the axis B rotates once around the axis A, and the axis B is between +d and -d in the direction orthogonal to the paper surface of Fig. 2. move across. Therefore, the positions of the push arms 5, 6 and the mold mounting blocks 3, 4 can be adjusted relative to each other by +d to -d, and therefore by 0 to 2d, in a direction perpendicular to the plane of the paper of FIG. Handle attachment parts 7c, 8c are provided at one ends of the connecting shafts 7, 8, and the connecting shafts 7, 8
When rotating, a handle (not shown) is attached thereto. A locking mechanism is provided between the connecting shafts 7, 8 and the mold mounting blocks 3, 4 to lock the relative rotation between the two and disable the relative rotation, or to release the lock and allow the relative rotation to occur freely. It is being This locking mechanism includes, for example, a block 16 whose rotation is restrained by a key or the like with respect to the connecting shafts 7 and 8, but which moves in the axial direction.
Then, the block 16 is moved to the side of the mold mounting blocks 3 and 4, and the rotation stopper 13 consisting of unevenness formed on the opposing surfaces of the block 16 and the mold mounting blocks 3 and 4, or the member 17 that rotates integrally therewith, and the block 16 are moved toward the mold mounting blocks 3 and 4. A nut 14 that restrains the block 16 from separating from the member 17 when the block 16 and the member 17 facing it are engaged at the rotation stopper 13.
It consists of When the nut 14 is tightened, the lock mechanism locks the relative rotation between the connecting shafts 7, 8 and the mold mounting blocks 3, 4, and when the nut 14 is loosened, the block 16 is moved in the direction away from the mold mounting blocks 3, 4. If so, the lock will be released.

Next, the operation of the apparatus configured as described above will be explained.

The workpiece W that has been butt-welded in the welding process, deburred, and edge rounded is sent to a flaring press and stopped. The hydraulic cylinder 12 operates to move the molds 1 and 2 to the workpiece W via the link mechanisms 9 and 10, the push arms 5 and 6 forming part of the link, the connecting shafts 7 and 8, and the mold mounting blocks 3 and 4.
, and expand both ends of the work W in the axial direction. After being expanded, the drive cylinder 12 is driven in the opposite direction to separate the mold 12 from the workpiece W, and the conveyor is operated to send the workpiece W to the next molding process.

When changing the type of workpiece W, use molds 1 and 2.
is replaced with one corresponding to the workpiece W. After replacement, when finely adjusting the positions of the molds 1 and 2, loosen the nut 14 and tighten the rotation stopper 13 of the locking mechanism.
The rotation lock is released, detachable handles are attached to the handle attachment portions 7c and 8c of the connecting shafts 7 and 8, and the connecting shafts 7 and 8 are rotated relative to the mold mounting blocks 3 and 4. First shaft support 7 of connecting shafts 7, 8
a, 8a and the second shaft supports 7b, 8b are offset from each other, so as the connecting shafts 7, 8 rotate, the mold mounting blocks 3, 4 and the push arms 5,
The relative position with respect to the connecting shafts 7 and 6 changes continuously, and when the distance between the molds 1 and 2 and the distance between the molds 1 and 2 and the center of the workpiece W axis reach the normal positions, the connecting shafts 7 and 8 rotation is stopped, the rotation stopper 13 is engaged to lock the relative rotation between the connecting shafts 7, 8 and the mold mounting blocks 3, 4, and the nut 14 is tightened to fix the relative rotation. This completes the fine adjustment of the mold 1 and 2 positions.

[Effect of the invention] As explained above, when using the mold position adjustment device for a flaring press according to the present invention, there is a gap between the mold and the driving means for driving the mold (hydraulic cylinder in the above embodiment). Since we used a connecting shaft in which the shaft center of the shaft support (first shaft support) with the mold mounting block and the shaft center of the shaft support (second shaft support) with the link (push arm) were offset, The position of the mold can be finely adjusted by rotating the connecting shaft, and there is no need to adjust the position of the mold by inserting and replacing shims of different plate thickness through trial and error as in the past. Position adjustment can be made easier and more accurate.

[Brief explanation of drawings]

FIG. 1 is a front view of a mold position adjustment device for a flaring press according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line - in FIG. 1. W...Work, d...Offset, 1, 2...
Mold, 3, 4... Mold mounting block, 5, 6...
Push arm (part of link), 7, 8...connection shaft,
7a, 8a...first pivot support, i.e., pivot support with the mold mounting block, 7b, 8b...second pivot support, i.e., the shaft with the link (push arm), 9,
10... link mechanism (part of link), 12...
Drive means (hydraulic cylinder).

Claims (1)

[Scope of utility model registration request] In a mold position adjustment device included in a flaring press that presses a mold against a cylindrical workpiece from both sides in the axial direction to expand the end of the workpiece, a mold mounting block for mounting and supporting the mold is attached to the workpiece. A connecting shaft having first and second shaft supports whose shaft centers are offset from each other is rotatably connected to the mold mounting block at the first shaft support, and the connecting shaft is rotatably connected to the mold mounting block by the first shaft support. A link for transmitting force to the mold mounting block via the connecting shaft is rotatably connected to the connecting shaft at the second shaft support, and a link is provided between the mold mounting block and the connecting shaft. A mold position adjustment device for a flaring press, characterized in that a locking mechanism is provided for locking or unlocking relative rotation between the mold mounting block and the connecting shaft.